JDH Roof Cost Page — Hero Section
Completed asphalt shingle roof replacement on colonial home in Southern Maryland by JDH Remodeling
2026 Southern Maryland Pricing Guide — Based on 1,460+ Local Inspections

How Much Does a New Roof Cost
in Maryland? An Honest Answer.

Most Southern Maryland homeowners pay between $9,500 and $20,000 for a full roof replacement in 2026. What you actually pay depends on your home's size, pitch, existing layers, and the system you choose. This guide gives you real numbers from real JDH projects — not national averages applied to your zip code.

MHIC #137491
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Serving MD Since 1986
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Section 2 — Price by Home Type
2026 Southern Maryland Pricing

What Does a Roof Replacement
Actually Cost?

The Direct Answer

In Southern Maryland, most homeowners pay between $9,500 and $20,000 for a full asphalt shingle roof replacement in 2026. Townhomes typically run $5,500–$8,500. A standard two-story colonial averages $9,500–$15,000. Larger or more complex homes run $15,000–$20,000 or more. Your exact number depends on pitch, number of existing layers, decking condition, and the system you choose — all of which JDH documents during a free forensic inspection before quoting.

Home Type 2026 Price Range Typical Profile What This Includes
Townhome /
Smaller Cape Cod
$5,500 – $8,500 Most in this range: ~$6,800 Single-story or low-pitch. Straightforward roofline. One or two facets. Common in older Calvert County neighborhoods and Waldorf-area townhome communities. Full tearoff (one layer), OC Duration® shingles, Deck Defense® synthetic underlayment, DuraRidge® ridge cap, drip edge replacement, permit, dumpster.
Average
2-Story Colonial
$9,500 – $15,000 Most Southern Maryland homes The most common home type JDH services in Calvert, Charles, and St. Mary's Counties. Typically 2,000–2,600 sq ft of roof surface. Standard pitch. Half-acre lot. Full tearoff, OC Duration® system, ice & water shield at eaves and valleys, Deck Defense® underlayment, DuraRidge® ridge cap, drip edge, permit, full cleanup.
Large / Complex /
Custom Home
$15,000 – $20,000+ Varies significantly by scope High pitch (8/12+), multiple facets, dormers, skylights, or waterfront coastal exposure. Common on larger lots in Huntingtown, Chesapeake Beach, Solomons, and Point Lookout-area properties. All of the above plus enhanced fastening for high-pitch or coastal exposure, additional flashing work at penetrations, and OC Platinum system upgrades available.

These ranges are based on actual JDH projects completed in Calvert, Charles, St. Mary's, Anne Arundel, and Prince George's Counties between 2024–2026. They are not national averages applied to Maryland zip codes. Your exact quote depends on conditions found during a forensic inspection — specifically pitch, layers, and decking condition. If another contractor quoted significantly outside these ranges in either direction, schedule a second opinion.

What Moves Your Number Up or Down

Every variable below is assessed and documented before we price your job.

Steep Pitch

Roofs 8/12 and steeper require safety harnesses, slower installation, and more labor time. Adds 15–30% to the labor component.

Increases Cost

Two-Layer Tearoff

Maryland code allows a maximum of two layers. If yours already has two, both must come off. Adds $800–$1,500 in labor and disposal. Roughly 40% of pre-2000 homes in Calvert and St. Mary's Counties have two layers.

Increases Cost

Decking Damage

Southern Maryland's Bay humidity degrades OSB decking faster than drier inland markets. About 30–35% of JDH replacements require at least partial decking work. Documented before tearoff — never a post-tearoff surprise.

Increases Cost

Roof Complexity

Dormers, valleys, skylights, chimneys, and multiple roof planes each require additional flashing and slow installation. A hip roof with three dormers is significantly more labor-intensive than a simple gable.

Increases Cost

Coastal Exposure

Homes within two miles of the Chesapeake Bay or Patuxent River require enhanced fastening, stainless drip edge, and coastal-rated systems. Adds $1,000–$3,000 depending on proximity and exposure.

Increases Cost

Simple, Walkable Roof

A straightforward gable, 4/12–6/12 pitch, one existing layer, solid decking, and no dormers or skylights is the most efficient installation profile. If this describes your home, you're at the lower end of the range for your home type.

Reduces Cost
Section 3 — Real Project Example
Real Project — No Estimates, No Guesses

What You Actually Get
for $14,900

This is a real JDH project completed in Prince Frederick, MD. Real scope. Real system. Real final number — not a range.

Before Aging asphalt shingle roof with granule loss and weathering on colonial home in Prince Frederick, MD — before JDH Remodeling replacement
After Completed Owens Corning Platinum roof replacement on colonial home in Prince Frederick, MD by JDH Remodeling — after

Prince Frederick, MD — Two-Story Colonial

This homeowner contacted JDH after noticing granule buildup in the gutters following a storm. Our forensic inspection confirmed the roof was at end of serviceable life: 18-year-old shingles with advanced granule loss, compromised nail zones, and soft decking at two valley transitions.

The project was priced as a fixed-cost replacement before tearoff — including the partial decking repair. The homeowner knew the exact number before we arrived on installation day. No post-tearoff add-ons.

We installed the full Owens Corning Platinum System: Duration® shingles, Deck Defense® synthetic underlayment, WeatherLock® ice & water shield at all eaves and valleys, DuraRidge® hip and ridge cap, and VentSure® ridge ventilation. Drip edge replaced on full perimeter. Calvert County permit pulled, inspected, and closed.

Total project time: one day. Crew on-site by 7:30 AM. Final cleanup and magnet sweep complete by 4:45 PM.

OC Duration® Shingles Deck Defense® Underlayment DuraRidge® Ridge Cap WeatherLock® IWS VentSure® Ventilation Calvert Co. Permit OC Platinum Warranty
Project Specs
Location Prince Frederick, MD — Calvert County
Home Type Two-Story Colonial
Roof Surface ~2,000 sq ft
Pitch 6/12 — Standard
Existing Layers One — Full Tearoff
Decking Partial repair at 2 valley sections
System Installed OC Platinum Package
Final Price $14,900 Fixed price — quoted before tearoff
What Our Forensic Inspection Documented Before We Quoted

Shingle Age & Wear

18-year-old shingles. Advanced granule loss on south-facing slopes. Tabs beginning to cup. End of serviceable life confirmed.

Decking Condition

Two valley transition zones showed soft spots from moisture intrusion. Documented and priced into the fixed quote before tearoff — no surprises.

Layer Count

One existing layer confirmed — no second-layer tearoff surcharge. Single tearoff keeps total cost at the lower end of the range for this home type.

Ventilation

Existing ridge vent partially blocked. Addressed during installation with new VentSure® system — included in the quoted price.

Want a number like this for your home?

Every JDH quote is built the same way this one was — forensic inspection first, fixed price before tearoff, named products on every line. No ranges. No post-tearoff surprises.

Get My QUOTE NOW
Section 4 — What's Included
No Hidden Line Items. Ever.

Everything in Your Quote.
Nothing Added After Tearoff.

The most common complaint homeowners have after a roof replacement is a price that changed once the crew pulled the old shingles off. JDH quotes are fixed. Every line item below is included in your price before we start — documented in writing, not discovered mid-job.

Line Item What It Is & Why It's In Every Quote Status
OC Duration®
Shingles
Our standard shingle — Owens Corning Duration® architectural shingles with SureNail® Technology for 130 MPH wind resistance. Never builder-grade. Never an unlabeled substitute. The brand and product are named on every quote. Always Included
Deck Defense®
Underlayment
Owens Corning Deck Defense® synthetic underlayment — not felt paper. Synthetic is non-absorbent, stronger, and required for OC warranty compliance. Competitors often substitute generic felt at a lower cost and don't tell you. Always Included
DuraRidge®
Ridge Cap
Owens Corning DuraRidge® — a purpose-built high-profile ridge cap shingle, not cut-down three-tabs. The ridge is the most wind-exposed point on your roof. DuraRidge is thicker, wider, and engineered specifically for this location. Always Included
Ice & Water
Shield
Self-sealing waterproof membrane installed at all eaves, valleys, and roof penetrations. Required by Maryland residential code. Prevents leak paths that develop during freeze-thaw cycles common in Calvert and Charles Counties each winter. Always Included
Drip Edge
Replacement
New metal drip edge on all eaves and rakes — not a reuse of existing flashing. Drip edge protects the wooden fascia from rot by directing water into the gutter. Skipping new drip edge is one of the most common cost-cutting moves on cheap bids. Always Included
Permit &
Inspection
JDH pulls the permit and handles the county inspection. Always. In Maryland, a roof replacement without a permit is the homeowner's liability — not the contractor's. If the low bid "doesn't include the permit," you are taking on that legal exposure yourself. See our Calvert County and Charles County process for permit details. Always Included
Full Tearoff &
Dumpster
Complete removal of all existing shingles and haul-away. Dumpster on-site for the duration. Property protected with tarps and magnetic nail sweep at completion. Your yard is left cleaner than we found it — this is a written commitment, not a verbal promise. Always Included
The JDH Commitment

Your Quote Is
Your Final Price.

We conduct a forensic inspection before every quote — not after tearoff. Deck condition, layer count, pitch, and penetrations are all documented in writing. That is why our price doesn't change.

Quote Type Fixed — Not an Estimate
Post-Tearoff Surprises None — Pre-Documented
Permit Responsibility JDH Handles It
Products Named Brand + Model, In Writing
Cleanup Included Magnetic Nail Sweep
How Low Bids Cut Corners

What the $6,000 Quote Leaves Out

  • Felt paper instead of synthetic underlayment — saves ~$400, voids the OC warranty, and fails faster in Bay humidity
  • Cut-down three-tab shingles used as ridge cap — thinner, not wind-rated for ridge application, fails at the most exposed point
  • Existing drip edge reused — saves ~$200, leaves rusted metal and fascia rot exposure
  • No permit pulled — saves $150–$400, puts the legal liability on the homeowner
  • No ice & water shield at valleys — skipped on "simple" roofs, creates the leak path that shows up in year three

The Products We Name on Every Quote

Not generic descriptions — specific brand and model, in writing, before work begins.

Owens Corning Deck Defense synthetic underlayment being installed by JDH Remodeling crew in Southern Maryland
Deck Defense® Underlayment Install
Owens Corning DuraRidge ridge cap being installed on a completed roof replacement in Southern Maryland by JDH Remodeling
DuraRidge® Ridge Cap Install
JDH Remodeling crew performing magnetic nail sweep cleanup after roof replacement completion in Southern Maryland
Post-Job Magnetic Nail Sweep
Section 5 — The Crew Difference
Factory-Trained. Never Subcontracted.

The $8,000 Bid Isn't
the Same Product.

When you compare roofing quotes, you're not just comparing prices. You're comparing who shows up, what they're trained to install, and whether the warranty they promise will actually be honored. Here's what that difference looks like in practice.

JDH Employees — Not Subcontractors

Every crew member on a JDH job is a direct JDH employee, not a day-labor subcontractor hired off a board for your specific job. The same crews who showed up on yesterday's job are showing up on yours. They know the system, they know the standard, and they know their work will be inspected by the same company that trained them.

Owens Corning Certified Installation

JDH holds Owens Corning Platinum Preferred contractor status — the top 1% of OC contractors nationwide. That designation requires factory-trained, certified crews on every installation. It's not a marketing badge; it's a prerequisite for the Platinum warranty to be issued. An uncertified installer voids the warranty before the first shingle is nailed.

HAAG-Certified Forensic Inspection

Before any crew touches your roof, a HAAG Master Inspector documents existing conditions — shingle age, granule loss, fastening pattern, decking integrity, flashing condition, ventilation. This isn't a sales visit. It's a forensic assessment that determines exactly what scope of work is warranted and eliminates post-tearoff pricing surprises.

Three Generations. One Standard.

JDH Remodeling has been operating in Southern Maryland since 1986. Third-generation family ownership means the person whose name is on the truck is the person accountable for your roof in 10 years — not a franchise operator or an out-of-state claims office. When you call with a warranty question, Jim Dodson answers.

OC Warranty Tiers

Why Certification Controls the Warranty

Standard Limited 25 yr

Available through any installer. No certification required. Prorated after year 10. Does not cover workmanship.

System Protection 50 yr

Requires full OC system installation — all six components. Non-prorated. Preferred contractor required.

Platinum Protection ★ 50 yr

Requires Platinum Preferred contractor status. Covers both materials and workmanship. This is what JDH installs on every job that qualifies.

The warranty you're quoted is only as good as the contractor issuing it. A non-certified installer cannot issue OC Platinum coverage — regardless of what their estimate says. Always ask for the contractor's OC certification number before signing. JDH's is on file with Owens Corning and available on request.

What OC Platinum Certification Actually Requires

Most homeowners don't know these standards exist. Now you do.

Requirement What It Means in Practice Why It Matters to You
Factory Training Crews must complete OC-administered installation training and pass certification testing — not just watch a YouTube video on nail placement. Correct fastening pattern, nail depth, and shingle alignment are the difference between a 50-year roof and a 15-year roof in Maryland wind conditions.
Six-Component System All six OC system products must be installed together: shingles, starter strips, underlayment, ridge cap, ice & water shield, and ventilation. Each component is engineered to work with the others. Swapping one for a generic equivalent breaks the system integrity and voids the Platinum warranty.
Active Licensing & Insurance Contractor must maintain current state licensing and general liability insurance at OC-specified minimums — verified annually. If something goes wrong and the contractor isn't properly insured, the liability falls on you. JDH carries $8M general liability — MHIC #137491, VA #2705192986.
Customer Satisfaction Standards OC monitors contractor reviews and complaint history as part of ongoing Platinum status evaluation. JDH maintains a 4.9★ rating across 1,460+ reviews — not because of review management, but because the work is done right the first time.
Top 1%
OC Platinum Preferred Status

Fewer than 1% of Owens Corning contractors in the country hold Platinum Preferred status. JDH has maintained it since qualifying.

4.9
1,460+ Verified Reviews

Across Google, Facebook, and the OC contractor portal. Every review is from a real Southern Maryland homeowner — not a managed campaign.

38yr
Operating in Southern Maryland

Since 1986. Third-generation family ownership. The same name on the truck for nearly four decades means someone is always accountable.

Section 6 — What Drives Cost Up
Forensic Inspection — Documented Before Quoted

Five Things That Move
Your Number Up

Every variable below is assessed and documented during a JDH forensic inspection before we produce a quote. None of these are post-tearoff surprises — they're line items you see and approve before we start.

Roof Pitch

Pitch is measured as rise-over-run — a 6/12 pitch rises 6 inches for every 12 inches of horizontal run. Once you're above 8/12, crews require safety harnesses, slower staging, and more labor time per square. High-pitch roofs on Chesapeake Bay waterfront properties are the most common driver of above-average labor cost in our market.

Typical impact: +15–30% labor
Two-Layer Tearoff

Maryland code allows a maximum of two shingle layers. If your home already has two, both must come off — there's no legal workaround. A second-layer tearoff roughly doubles the disposal weight and adds significant labor time. Roughly 40% of pre-2000 homes in Calvert and St. Mary's Counties have two layers.

Typical impact: +$800–$1,500
Roof Complexity

A simple gable with two slopes is the fastest installation profile. Every additional element — dormers, valleys, skylights, chimneys, multiple hips — adds flashing work, cuts, and time. A hip roof with three dormers and a skylight can easily be 30–40% more labor-intensive than a geometrically simple roof of the same square footage.

Typical impact: +10–40% labor
Decking Damage

OSB decking degrades faster in Southern Maryland's Bay-influenced humidity than in drier inland markets. Soft spots, delamination, and rot — particularly at valleys and around penetrations — are common in homes over 15 years old. About 30–35% of JDH replacements require some decking work.

Typical impact: +$400–$2,500+
System Tier

The base system is OC Duration® with standard components. Upgrading to the full OC Platinum System — Deck Defense® underlayment, WeatherLock® ice & water shield, DuraRidge® ridge cap, and factory ventilation — adds cost but also adds the 50-year non-prorated workmanship warranty.

Typical impact: +$800–$2,000
Coastal Exposure

Homes within two miles of the Chesapeake Bay, Patuxent River, or major tidal tributaries face elevated wind loads and salt-air corrosion that inland homes don't. Coastal installations require enhanced fastening patterns (closer nail spacing, ring-shank nails), stainless steel drip edge and flashing, and in many cases the full OC coastal wind warranty package.

JDH documents your property's proximity to tidal water during the inspection. If enhanced fastening is required, it's a line item on your quote — not a post-tearoff add-on. This is one of the most commonly overlooked cost factors by contractors unfamiliar with the Southern Maryland market.

Typical impact: +$1,000–$3,000
Coastal Adder by Area
Chesapeake Beach / N. Beach +$1,500–$2,500
Solomons / Calvert Cliffs +$1,200–$2,200
Pt. Lookout / St. Mary's waterfront +$1,500–$3,000
Patuxent River frontage +$1,000–$2,000
Inland (>2 mi from tidal water) Standard pricing

The "Hidden Cost" Problem — and Why JDH Doesn't Have It

Decking damage is the most common source of post-tearoff price surprises in the roofing industry. The standard contractor response: "We couldn't see it until the old roof was off." That's technically true for contractors who do a walk-and-talk estimate. It's not true for a HAAG-certified forensic inspector with a moisture probe.

JDH probes every valley, every penetration, and every suspect area during the inspection — before your quote is written. If decking repair is needed, it's in the number you approve. If the deck is solid, that's documented too and reflected in your price. Either way, the number on your final invoice matches the number you signed.

Variable What JDH Documents During Inspection Typical Cost Impact
Steep Pitch (8/12+) Pitch measured via inclinometer and aerial verification. Safety requirements and labor multiplier determined pre-quote. +15–30% on labor
Two-Layer Tearoff Layer count confirmed by probing at eave edge. Disposal weight and added labor hours priced before tearoff. +$800–$1,500
Roof Complexity All valleys, dormers, penetrations, and transitions counted and measured. Flashing scope itemized on quote. +10–40% on labor
Decking Damage Moisture probe at all transitions and soft spots. Affected square footage estimated and priced into fixed quote. +$400–$2,500+
Coastal Exposure Distance to tidal water measured. Enhanced fastening and stainless hardware requirements determined. +$1,000–$3,000
System Tier (Platinum) Standard vs. Platinum component options presented with price difference and warranty comparison side-by-side. +$800–$2,000
Section 7 — What Drives Cost Down
The Lower-End Profile

What Puts You at the
Bottom of the Range

Not every home is a complex job. If your property checks these boxes, you're looking at the lower end of the price range for your home type — and a faster, simpler installation day.

Low or Standard Pitch (4/12–6/12)

A walkable pitch means no specialized safety rigging, standard staging, and full crew efficiency throughout the day. The majority of colonials and ranches in Prince Frederick, Waldorf, and Leonardtown are in this range — it's the most common profile JDH installs.

Savings vs. steep pitch: 15–30% on labor

One Existing Layer

If your home has only one layer of shingles — the most common scenario for post-2000 construction — tearoff is straightforward. No extra labor, no extra disposal weight, no second-layer surcharge. About 60% of homes JDH inspects have a single layer.

Savings vs. two-layer: $800–$1,500

Solid, Dry Decking

When the forensic inspection confirms no soft spots, no delamination, and no moisture intrusion at valleys or penetrations, decking work comes off the scope entirely. This keeps your price firmly within the base range — no repair allowance built into the quote.

Savings vs. partial repair: $400–$2,500+

Simple Roofline Geometry

A straightforward gable — two main slopes, minimal hips, no dormers, no skylights, no chimneys other than a standard flue — is the fastest installation profile. Fewer cuts, fewer transitions, fewer flashing details. Simple geometry is the single biggest driver of lower labor cost after pitch.

Savings vs. complex: 10–40% on labor

Inland Location (No Coastal Premium)

Properties more than two miles from tidal water — most of inland Calvert, Charles, and St. Mary's Counties — don't require enhanced fastening patterns, stainless hardware, or the coastal wind warranty package. Standard installation spec applies throughout.

Savings vs. coastal: $1,000–$3,000
The Lowest-Cost Profile

What the Bottom of the Range Looks Like

A home that checks all five boxes below will price at or near the low end of its home-type range. This is a real and common scenario.

Pitch: 4/12–6/12 Walkable. No safety rigging required.
One existing layer Standard tearoff. No double-layer surcharge.
Solid, dry decking No repair scope. Full base-range pricing.
Simple gable geometry Two slopes, minimal penetrations.
Inland location No coastal fastening or hardware premium.

How the Variables Stack

Same home type, different variables — see how the range shifts from the simplest to the most complex profile.

Simple Profile 1 layer · walkable · inland · solid deck · gable
~$9,500
Average Profile 1 layer · standard pitch · inland · minor decking
~$13,500
Complex Profile 2 layers · steep · coastal · decking · dormers
~$20,000+
Section 8 — Why Cheap Costs More
The True Cost of the Low Bid

The $8,000 Roof That
Costs $19,000

We see this pattern in Southern Maryland several times a year. A homeowner accepts a low bid, the job goes sideways, and JDH gets called in to document and remediate. Here's exactly how it unfolds — and what the final number looks like.

A Composite of Real Southern Maryland Cases — How the Low Bid Unfolds

1

The Quote — Walk-and-Talk Estimate

Contractor walks the yard, glances at the roof from the ground, and produces a quote in 20 minutes. No measurement, no layer count, no moisture probe. The quote looks great — $7,800 for a full replacement. No permit mentioned. No specific products listed. Generic "30-year shingle."

Original bid: $7,800
2

Post-Tearoff "Discovery" — The Second Layer

Old roof comes off on day one. Contractor calls the homeowner at 4 PM: "There's a second layer under there — we didn't see it from the ground. That'll be an extra $1,200." The old roof is in the dumpster. There's no negotiating. Homeowner approves.

Add: +$1,200
3

The Decking Surprise

Deck exposed, crew finds soft spots at three valleys. Another call: "We need to replace six sheets of decking before we can proceed — add $900." Again, the homeowner has no alternative. A JDH inspection would have found and priced this before tearoff. Now it's a hostage negotiation.

Add: +$900
4

No Permit — Problem at Sale

Job completes. Roof looks fine. Three years later, the homeowner lists the house. Home inspector flags the roof: no permit on record, non-standard drip edge, missing ice & water shield at valleys. Buyer demands a $4,000 credit or a licensed contractor re-inspection with documented remediation.

Add: +$4,000 credit at sale
5

Premature Failure — No Warranty Coverage

Year 7: shingles lifting at the ridge. Homeowner calls the original contractor — phone disconnected. Calls Owens Corning — no Platinum warranty on file, because the installer wasn't certified. No workmanship coverage. Full replacement required. JDH is called to document and quote.

Add: full reroof ~$13,000

The "$7,800 roof" cost this homeowner over $27,000 across seven years — plus the stress of a failed sale negotiation and a contractor who disappeared. A JDH Platinum installation on the same home would have been $13,500, warranted for 50 years, with a closed permit on record.

Low Bid Total $27,900 Over 7 years
vs.
JDH Platinum $13,500 50-yr warranty

* This is a composite scenario based on cases JDH has been called to document in Southern Maryland. Individual outcomes vary. The specific failure points (second layer, decking, permit, warranty) are among the most common patterns JDH encounters during second-opinion inspections.

Specific Line Items Low Bidders Skip

These are not opinions. They're the exact items most commonly absent from low bids JDH has reviewed in this market.

Skipped Item What Happens Without It Eventual Cost
Building Permit Unpermitted work flagged at resale inspection. Buyer demands credit or remediation. Insurance claim denial risk on future storm damage. $2,000–$6,000 credit at sale
Drip Edge Replacement Corroded original drip edge wicks moisture into fascia. Fascia rots within 3–5 years in Maryland humidity. Gutter detachment follows. $800–$2,500 fascia repair
Synthetic Underlayment Felt paper absorbs moisture and degrades. Secondary water barrier compromised within 5–8 years. Voids Platinum warranty eligibility entirely. Warranty voided; leak remediation varies
Engineered Ridge Cap Cut-shingle ridge caps fail at wind speeds well below what a Chesapeake Bay-area roof encounters. Blow-offs start at the ridge first. $600–$1,800 ridge repair
Ice & Water Shield at Valleys Valley leaks in the first hard freeze or ice dam event. Water intrusion at the most concentrated runoff point on the roof. $1,500–$4,000 interior water damage
Pre-Tearoff Decking Inspection Soft decking installed over. Fasteners don't hold. Shingles delaminate within 3–5 years. Warranty claim denied — decking condition not documented. Partial or full reroof required

Get a Second Opinion
Before You Sign.

If you've received a quote that's significantly below the ranges on this page, a free JDH forensic inspection will tell you exactly what's in it and what's not — before you're committed. No pressure. No obligation. Just a documented answer.

Get An Online Quote Now

HAAG Master Inspector · Calvert, Charles, St. Mary's, Anne Arundel & PG Counties

Section 9 — The 35% Rule
JDH's Repair vs. Replacement Standard

The 35% Rule:
When We Recommend Repair

Most roofing contractors make more money replacing than repairing. That creates an obvious conflict of interest. JDH uses a documented threshold — the 35% Rule — to take that bias out of the equation.

The Standard

If the repair cost is less than 35% of a full replacement
— and it's a long-term solution — we recommend the repair.

We only make repairs when it is ethical and a long-term solution. Not just a money grab. If patching a section will give you another 8–12 years of serviceable life at a fraction of replacement cost, that's what we recommend — even though replacement pays us more.

Recommend Repair

Under 35%

JDH recommends repair when the scope is isolated, the surrounding system is still structurally sound, and a repair will deliver a genuine long-term solution — not just buy a year or two of delay.

Repair cost is under 35% of full replacement cost
Surrounding shingles have 5+ years of remaining life
Damage is isolated — not a symptom of system-wide failure
Repair is a genuine long-term solution, not a cosmetic patch
Decking underneath the affected area is dry and structurally sound

Recommend Replacement

35% or Over

When repair cost approaches or exceeds 35% of replacement, the math stops working in the homeowner's favor. You're spending significant money on a partial fix that leaves the rest of an aging system in place.

Repair cost is 35% or more of full replacement cost
Shingles are at or past end of serviceable life system-wide
Damage is spread across multiple areas — not isolated
Repair would not be warrantable given the system's condition
Insurance claim involved — like-and-kind replacement is more appropriate

The Math in Practice — Two Real Scenarios

Scenario A — Repair Recommended
Home location Leonardtown, MD
Issue Storm damage — one slope, 8 squares
Roof age 9 years — solid condition overall
Full replacement cost $13,200
35% threshold $4,620
JDH repair quote $2,800
Repair recommended. At 21% of replacement cost, with 10–15 years of remaining life on the surrounding system, repair is the ethical answer.
Scenario B — Replacement Recommended
Home location Prince Frederick, MD
Issue Leaks at two valleys + granule loss
Roof age 19 years — widespread wear
Full replacement cost $14,900
35% threshold $5,215
Repair scope estimate $5,800+
Replacement recommended. At 39% of replacement cost — and with the rest of the system already at end of life — repair is not a long-term solution. It's a money grab.

Why This Standard Matters — and Why Most Contractors Don't Use It

A roofing contractor who recommends replacement on every job that could be repaired is operating at the homeowner's expense. The industry average replacement recommendation rate is significantly higher than it should be — because replacement is more profitable than repair in almost every scenario.

JDH's forensic inspection methodology exists precisely to remove that bias. When a HAAG Master Inspector documents the condition before recommending a scope of work, the recommendation is based on the data — not the contractor's margin. We make repair recommendations regularly, including on jobs where we knew the homeowner expected to hear "you need a new roof."

If you've been told you need a full replacement and you're not sure, ask for a second forensic opinion. JDH's inspection is free and comes with no replacement obligation.

Section 10 — Southern Maryland Pricing Data
Local Data — Not National Averages

Why National Cost Calculators
Get Southern Maryland Wrong

Every major roofing cost calculator on the internet uses national average labor rates, national average material costs, and generic climate assumptions. None of them account for what makes Southern Maryland different. Here's the data that actually applies to your zip code.

What National Calculators Assume

A flat labor rate applied to square footage. Standard pitch. Inland climate. No permit cost variability. No coastal exposure. No two-layer prevalence data by county. The result is a number that may be $2,000–$5,000 off for a typical Southern Maryland home — in either direction.

What JDH's Data Is Based On

Actual completed projects across Calvert, Charles, St. Mary's, Anne Arundel, and Prince George's Counties between 2022–2026. Real permit fees by county. Real coastal exposure premiums by proximity to tidal water. 38 years of pricing data in this specific market.

60%
Bay Humidity Factor

Chesapeake Bay region averages 60–75% relative humidity — significantly above the national average. Accelerates OSB decking degradation.

74mph
Design Wind Speed

ASCE 7 design wind speed for Southern MD. Coastal properties may require enhanced fastening above this baseline.

43in
Annual Rainfall

Southern Maryland averages ~43 inches of rain annually, plus occasional tropical storm rainfall. Proper valley and flashing detail is non-negotiable.

110°F
Roof Surface Temp

Dark shingles in full summer sun can reach 110–150°F. Proper ventilation prevents thermal shingle failure and premature granule loss.

County Permit Requirements & Typical Fees

JDH pulls every permit. Here's what to expect by county — and why skipping it puts you at risk.

County Permit Required? Typical Fee Inspection Required? Notes
Calvert County Yes — full replacement $75–$150 Yes — final inspection required JDH permits all work from Prince Frederick HQ. Turnaround typically 3–5 business days.
Charles County Yes — full replacement $100–$175 Yes — final inspection required Waldorf-area projects covered. Waldorf service area includes White Plains, La Plata, Indian Head.
St. Mary's County Yes — full replacement $75–$140 Yes — final inspection required Leonardtown, Lexington Park, Great Mills, Mechanicsville. Some coastal properties may require additional review.
Anne Arundel County Yes — full replacement $100–$200 Yes — final inspection required Deale, Lothian, Davidsonville, Shady Side. Higher permit fees reflect county rate structure. JDH serves the southern AA County corridor.
Prince George's County Yes — full replacement $125–$225 Yes — final inspection required Accokeek, Bryans Road, Fort Washington. Highest permit fees in the JDH service area. Permit cost included in all JDH quotes.

JDH Project Data by County — 2024–2026

Based on completed roof replacements. All projects included full OC system installation, permit, and cleanup.

County Typical Range Most Common Home Type Local Factors
Calvert County $9,500 – $18,000 Avg: ~$13,200 Two-story colonial, 1,800–2,400 sq ft. Mix of 1980s–2000s construction. Higher coastal premium near Chesapeake Beach and Solomons. ~40% of pre-2000 homes have two layers. Bay humidity elevates decking repair rate. Coastal properties in Chesapeake Beach and Lusby require enhanced fastening.
Charles County $9,000 – $17,500 Avg: ~$12,800 Waldorf-area colonials and newer construction townhomes. Higher townhome volume than Calvert. La Plata and White Plains skew toward larger homes. More post-2000 construction means lower two-layer rate. Inland location keeps most projects at standard fastening spec. Active storm season in 2023–2024 drove high volume.
St. Mary's County $9,500 – $20,000+ Avg: ~$13,800 Wide range — from Lexington Park ranch homes to large waterfront properties near Point Lookout and St. Mary's City. Higher complexity average than other counties. Highest coastal exposure rate in JDH service area. Point Lookout and St. George Island properties require full coastal spec. Rural areas have more older construction.
Anne Arundel (South) $10,000 – $18,500 Avg: ~$14,200 Deale, Shady Side, Lothian, Davidsonville. Mix of waterfront cottages, newer colonials, and rural properties. Higher permit fees factor into total cost. Deale and Shady Side waterfront properties have significant coastal premium. Higher permit fees vs. southern counties. Western Shore Bay exposure is a consistent factor.

Data source: JDH Remodeling completed projects, 2024–2026. Ranges reflect full OC system installations including permit, tearoff, and cleanup. Averages are calculated across all home types within each county. Individual project costs vary based on pitch, layers, decking condition, and system tier. These figures are not applicable to repair-only scopes.

The Chesapeake Bay Factor:
Why This Market Is Different

Southern Maryland is one of the few roofing markets in the mid-Atlantic where three distinct climate stressors act on roofs simultaneously: Bay humidity, coastal wind exposure, and wide seasonal temperature swings. A national average doesn't capture any of these.

A roof installed to standard inland spec in Chesapeake Beach will underperform versus the same system installed to coastal spec. JDH accounts for proximity to tidal water on every quote — because it's the only responsible way to specify work in this market.

Bay Humidity

60–75% average relative humidity accelerates OSB decking degradation and promotes algae growth on shingles. Deck Defense® synthetic underlayment is non-negotiable.

Coastal Wind Loads

Waterfront and near-shore properties face elevated wind speeds and direction variability. Enhanced fastening patterns and stainless hardware prevent blow-offs.

Temperature Extremes

Southern Maryland roofs cycle from 110°F+ summer surface temps to sub-freezing winter conditions. Proper ventilation and ice & water shield coverage prevent thermal failure.

Section 12 — Financing
Service Finance & Wells Fargo

Don't Let the Upfront Cost
Delay a Necessary Repair

A roof that needs replacement doesn't get better with time — it gets more expensive. JDH offers financing through two institutional lenders so the project that protects your home doesn't have to wait for a lump sum.

Service Finance Company

Primary home improvement lender — most approvals

Same-As-Cash Promo 0% for 12 months

No interest if paid in full within the promotional period. Best option for homeowners who can pay within the year — insurance checks, tax refunds, or structured savings.

Extended Term 60–120 months

Fixed monthly payment over 5–10 years. Competitive rates. Best for homeowners who prefer a predictable monthly cost spread over a longer horizon.

Soft credit pull for pre-qualification. Hard pull only at final approval. Most decisions in minutes. Ask JDH during your inspection appointment.

Wells Fargo Home Projects

Secondary option — broader credit range

Reduced Rate Promo Low fixed rate

Promotional fixed-rate financing for qualified borrowers. Strong option if you don't qualify for the Service Finance 0% promo or prefer Wells Fargo's terms.

Standard Terms Up to 84 months

Standard financing up to 7 years. Established lender relationship — same Wells Fargo account management most homeowners are already familiar with.

Good option for homeowners with established credit history. JDH can run both lenders simultaneously to find the best approval. Ask during your inspection.

What Your Monthly Payment Looks Like

Based on representative project costs and financing terms. Actual rates and payments depend on credit profile and lender approval.

Project Cost 12-Mo / 0%
Service Finance promo
60-Mo / Fixed
~9.99% APR est.
120-Mo / Fixed
~12.99% APR est.
Typical Scenario
$7,500 $625 / month ~$159 / month ~$112 / month Townhome or smaller cape cod. Single layer, standard pitch.
$12,500 $1,042 / month ~$266 / month ~$186 / month Average Calvert County colonial. OC Platinum system, one layer.
$15,000 $1,250 / month ~$319 / month ~$224 / month Standard colonial with decking repair or two-layer tearoff.
$18,500 $1,542 / month ~$394 / month ~$276 / month Larger or coastal home. Steep pitch, full Platinum system.

Common Financing Questions

Can I finance my insurance deductible?

Yes. Your deductible is a real cost and financing it is completely legitimate. JDH's financing options can cover any portion of your out-of-pocket cost — including the deductible, upgrade difference, or the full project amount if you're paying without insurance.

When does financing get applied?

Financing is applied at contract signing, before work begins. Your approval is confirmed before installation day so there are no payment complications at project completion. The financing timeline never holds up your job.

Does financing affect my contract price?

No. JDH's fixed-price quote is the same whether you pay cash, check, or finance. We do not add a financing surcharge or adjust the project price based on payment method. The number you approve is the number on the invoice.

What credit score do I need?

Service Finance and Wells Fargo both offer options across a range of credit profiles. A score of 640+ typically qualifies for most terms. JDH can run a soft pre-qualification that doesn't affect your score before you decide whether to proceed.

Can I pay off the loan early?

Yes — both lenders allow early payoff without penalty. If you receive an insurance check after financing the project, you can apply it directly to the loan balance. No prepayment penalties on either lender's standard terms.

What if I'm denied by one lender?

JDH works with two lenders specifically so we have a backup option. If Service Finance declines, we move to Wells Fargo — or vice versa. If both decline, we'll discuss alternative options. We don't leave homeowners without a path forward.

Ask About Financing During
Your Free Inspection.

There's no obligation to finance and no pressure to decide on-site. JDH will present your options at the time of quote so you can make an informed decision. The inspection and quote are always free — financing is just one more tool available to you.

Get Online Price
Section 11 — Storm Damage & Insurance
Insurance Claims — How It Works

Storm Damage &
Your Insurance Claim

If your roof was damaged by hail or wind, insurance likely covers it. Here's the exact process JDH uses — and what makes it different from how most contractors handle a claim.

1

Storm Damages Your Roof

Hail, wind, falling debris. You notice damage or a neighbor flags it.

2

JDH Forensic Inspection

HAAG-certified inspection documents damage type, extent, cause, and affected squares. Free, no obligation.

3

Review Options & Sign with JDH

We present your scope and system options. You choose, sign the contract. No carrier call first.

4

Contract Submitted to Carrier

The signed JDH contract is submitted to your insurance carrier as the documented basis for settlement.

5

Work Done — You Pay JDH

JDH completes the job. You pay us. Your carrier reimburses you for the covered amount.

Your Deductible Is Always Your Responsibility

Your deductible is the amount your policy requires you to pay before coverage applies. It is always the homeowner's responsibility — not the contractor's. This is a contract between you and your insurer, not a negotiating point.

Many coastal and waterfront policies in Southern Maryland carry percentage-based wind/hail deductibles — typically 1–5% of your home's insured value. On a $450,000 home with a 2% wind deductible, that's $9,000 out of pocket before coverage applies. JDH offers financing options that can cover your deductible.

Waiving the Deductible Is Insurance Fraud in Maryland

Any contractor who offers to "waive your deductible," "work within your deductible," or "cover your deductible" is asking you to participate in insurance fraud. In Maryland, this is a misdemeanor for both the contractor and the homeowner.

JDH does not do this. We never have. We quote what the job costs and collect what the contract says. If a contractor leads with "we'll handle your deductible," that tells you everything you need to know about how they operate.

Think You Have Storm Damage?
Start With the Inspection.

JDH's forensic inspection is free and comes with no replacement obligation. We'll document what's there, tell you what it means, and give you options — before you sign anything.

InstanT Roof PRICE
Section 13 — FAQs
Common Questions — Answered Directly

Roof Replacement FAQs

The questions Southern Maryland homeowners ask us most often — answered the way we'd answer them in person.

01
How much does a new roof cost in Maryland?
In Southern Maryland, a full roof replacement typically costs between $9,500 and $20,000 for most residential homes. A standard two-story colonial (1,800–2,400 sq ft) runs $9,500–$15,000. Townhomes range from $5,500–$8,500. Larger or more complex homes with steep pitches, coastal exposure, or two-layer tearoff can reach $20,000 or more.
These ranges are based on actual JDH projects in Calvert, Charles, and St. Mary's Counties and include permit, full tearoff, and Owens Corning system installation. National average calculators often miss Southern Maryland's Bay humidity surcharges, county permit fees, and coastal wind load requirements. See pricing by home type above or request a free inspection for your specific address.
02
What's included in JDH's roof replacement price?
Every JDH replacement includes: HAAG forensic inspection before the quote, county permit and final inspection, full tearoff and dumpster, new drip edge, Deck Defense® synthetic underlayment, WeatherLock® ice & water shield at all eaves and valleys, Owens Corning Duration® shingles with SureNail® technology, DuraRidge® hip and ridge cap, new pipe boots and flashing at all penetrations, and complete debris cleanup.
There are no line items that appear after signing. JDH quotes fixed prices — what you sign is what you pay. See the full inclusion comparison for a side-by-side with typical low-bid contractors.
03
How do I know if I need a repair or full replacement?
JDH uses the 35% Rule: if the cost to repair an isolated problem is less than 35% of a full replacement — and the repair is a genuine long-term solution — we recommend the repair. Repair is appropriate when the surrounding shingles have 5+ years of remaining life, the damage is isolated, and the decking is sound.
Replacement is recommended when repair cost approaches 35%+ of replacement, when the shingle system is broadly at end of life, or when damage is spread across multiple areas. We don't default to replacement because it pays more. See the full 35% Rule explanation above.
04
Does homeowner's insurance cover roof replacement?
Yes, if the damage was caused by a covered peril — typically hail, wind, falling debris, or storm events. Insurance does not cover normal wear or age-related deterioration. When damage is covered, your insurer is required to restore your roof to like-and-kind condition.
JDH provides a HAAG-certified forensic damage report, detailed measurements, and a material specification letter to support your claim. JDH does not file claims on your behalf — you file, we provide the documentation. See the full storm damage and insurance section.
05
How long does a roof replacement take?
Most residential replacements in Southern Maryland are completed in one day. Larger or steeper roofs may require two days. Weather holds are the primary variable — JDH does not install in rain or below-freezing temperatures. Typical scheduling lead time after contract is 1–3 weeks, longer during storm season.
06
What is an Owens Corning Platinum Preferred contractor?
Owens Corning Platinum Preferred is the highest contractor designation OC awards — less than 1% of roofing contractors in the United States hold it. Requirements include factory-trained direct crews (no subcontractors), full six-component OC system installation, active licensing and insurance, and demonstrated customer satisfaction.
The designation is required to issue the OC Platinum Protection Warranty — which covers materials and workmanship for 50 years. No other warranty tier includes workmanship coverage. JDH has held Platinum Preferred status since qualifying. See the crew difference section for full certification details.
07
What is a HAAG Master Inspector — and why does it matter?
HAAG Engineering is the industry standard for forensic roof damage analysis. HAAG Master Inspector certification requires passing a rigorous written and field examination covering hail impact patterns, wind damage mechanisms, installation defects, and the difference between covered storm damage and excluded wear.
In practice, it means JDH produces a documented, defensible report of your roof's condition — not a visual walk-and-talk. That report matters most when negotiating a coverage dispute with your carrier, or when you need to document the scope of work for a future home sale. Most roofing contractors do not have this credential.
08
Do I need a permit for a roof replacement in Maryland?
Yes. All five counties in JDH's service area — Calvert, Charles, St. Mary's, Anne Arundel, and Prince George's — require a permit for a full roof replacement, with a county inspection on completion. JDH pulls every permit. It's included in every quote.
A roof replaced without a permit creates a title problem at sale. Buyers' home inspectors flag unpermitted work, and it can delay or kill a closing. Typical permit fees range from $75–$225 depending on county. See the county permit table for specific fee ranges.
09
How does JDH's fixed-price quote work?
JDH conducts a HAAG forensic inspection before quoting. The inspection documents decking condition, layer count, pitch, all penetrations, and any access issues that affect cost. The resulting quote is a fixed price including all labor, materials, permit, tearoff, cleanup, and the specified OC system components.
If the inspection finds decking damage, that scope and cost are documented before you sign — not added as a surprise after tearoff begins. The number on the contract is the number on the invoice. There are no post-sign change orders for items a thorough inspection would have identified.
10
What financing options does JDH offer?
JDH offers financing through Service Finance Company and Wells Fargo Home Projects. Service Finance offers a 0% same-as-cash promotional period (typically 12 months) and extended fixed-rate terms of 60–120 months. Wells Fargo offers promotional and standard terms up to 84 months.
Both lenders offer pre-qualification with a soft credit pull that does not affect your score. Financing can cover any out-of-pocket cost including your insurance deductible. JDH's quoted price does not change based on payment method — there is no financing surcharge. See the full financing section for payment examples.

Still Have a Specific Question?

Every roof is different. Schedule a free forensic inspection and Jim will walk through your specific situation — scope, cost, warranty options, and insurance documentation if a claim is involved. No sales pressure. No replacement pitch before the inspection is done.

Instant Roof Price
Step 1 of 9
Step 1 of 9

What's Your
Home Address?

Start typing to search your address.

Your address is only used to estimate your roof. Never shared.
Step 2 of 9

How Big Is
Your Home?

Select the closest match to your home's square footage.

Small
Under 1,500 sq ft
Medium
1,500 - 2,500 sq ft
Most Common
Large
2,500+ sq ft
Step 3 of 9

How Many
Stories?

Multi-story homes require additional safety equipment and staging time.

1 Story
Single-level home
2 Stories
Most common in Southern MD
Most Common
3+ Stories
Requires extra staging
Step 4 of 9

Roof Shape &
Complexity

More valleys and angles mean more cuts, flashing, and labor.

Simple
Basic gable, 1-2 planes
Moderate
Hip or cross-gable, a few valleys
Most Common
Complex
Multiple planes, dormers, many valleys
Step 5 of 9

Current Roofing
Material

This affects tear-off cost and disposal fees.

Asphalt
Standard shingles, easiest tear-off
Metal
Standing seam or panels
Tile / Slate
Heavy, labor intensive removal
Step 6 of 9

How Many Layers
Are On Your Roof?

Multiple layers require more labor to remove. Most homes replaced after 1990 have just 1.

1 Layer
Standard, easiest removal
Most Common
2 Layers
Additional labor required
3+ Layers
Maximum tear-off effort
Step 7 of 9

How Old Is
Your Roof?

Older roofs are more likely to have damaged decking underneath.

Newer
Under 10 years, likely sound decking
Mid-Age
10-20 years, some wear expected
Most Common
Older
20+ years, higher decking risk
Step 8 of 9

What's Your
Roof Pitch?

Match your roof to the closest silhouette below.

Low Pitch
Gradual slope - 2:12 to 4:12
Medium Pitch
Standard slope - 5:12 to 8:12
Most Common
Steep Pitch
Very steep - 9:12 and above
Step 9 of 9

Any Additional
Work Needed?

Optional -- select anything that applies. Our inspector will confirm on-site.

Tear-Off (Multiple Layers)
Extra removal for 2+ existing shingle layers
Decking Replacement
Replace rotted or damaged plywood sheathing
Skylight Install / Replace
New or replacement skylight with flashing

Not sure? Leave unchecked -- our inspector identifies everything during your free inspection.

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Based on your answers -- all three tiers include OC Platinum Preferred installation and full warranty.

Estimates based on Southern Maryland market pricing. Actual cost confirmed after your free on-site inspection with a HAAG-certified inspector.
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