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Commercial roofing services across the DMV

Flat and low-slope work is the whole job here. Each page below covers what the system is, what it costs, what the code requires, and the things worth knowing before you sign anything.

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Roof replacementFull replacement is the largest single line item most commercial buildings will spend on the envelope. Here is what actually drives the number, what the code forces, and how to tell a real scope from a thin one.Read more → TPO roofingTPO is the default for most low-slope replacements in this region, and for good reasons — but only if it is specified properly. Thickness, attachment and seam quality separate a twenty-five year roof from a twelve year one.Read more → EPDM roofingEPDM has the longest real-world track record of any modern low-slope membrane. On buildings with a lot of rooftop equipment, it is often still the right answer.Read more → PVC roofingIf your roof has kitchen exhaust, chemical discharge or industrial fume on it, PVC is not the upgrade option — it is the correct specification.Read more → Modified bitumen & BURMulti-ply asphalt systems are no longer the default, but on small complex roofs with real foot traffic they are still frequently the toughest thing you can put down.Read more → Coatings & restorationA restoration coating can add ten to twenty years to a sound roof for a fraction of replacement cost. It can also be the most expensive way to delay a tear-off by two years. The substrate decides which.Read more → Metal roofingMost commercial metal roofs in this region do not need replacing. They need fasteners, seam treatment and a coating — at a fraction of the cost of tearing one off.Read more → Roof repair & leaksThe water on your ceiling tile is almost never below the hole. Finding the actual entry point is the job; the patch is the easy part.Read more → Maintenance programsThe cheapest roof you will ever own is the one you already have, maintained. Two visits a year is the difference between a twenty-year roof and a thirty-year one.Read more → Storm & insuranceA claim succeeds or fails on documentation gathered in the first week. Here is what to capture, what carriers actually pay for, and where storm-chaser contractors will get you in trouble.Read more →

Cost

DMV commercial roofing cost ranges.

Planning numbers for the region, so you can sanity-check a bid before it reaches your board.

SystemInstalled cost / sq ftTypical service lifeNotes
TPO, mechanically attached$9 – $1620–30 yrsMost common DMV replacement. Reflective, heat-welded seams.
TPO, fully adhered$11 – $1920–30 yrsQuieter, better wind performance, no fastener pattern telegraphing.
EPDM, mechanically attached$8.50 – $1520–30 yrsProven on older stock. Black absorbs heat; ballast or white options exist.
EPDM, fully adhered$10.50 – $1825–30 yrsCleaner detailing around heavy penetration counts.
PVC single-ply$11 – $1920–30 yrsGrease and chemical resistant — restaurants, kitchens, industrial exhaust.
Modified bitumen, 2-ply$10 – $1815–25 yrsTough underfoot. Good on small, complex, high-traffic roofs.
Built-up (BUR), 3–4 ply$11 – $2020–30 yrsRare as new work now; mostly repaired or overlaid.
Silicone restoration coating$3.50 – $710–20 yrsOnly over a sound, dry substrate. Renewable warranty at end of term.
Metal retrofit / recover$12 – $2530–40 yrsWide range — standing seam over purlins vs. coating an existing panel roof.

How to read these. Ranges are DMV market pricing for planning and budgeting, not a quote. Real numbers move with deck condition, insulation required to hit code, access and staging, how much rooftop mechanical equipment has to be lifted and reset, and whether the work is phased around tenants.

Investigation, maintenance and discovered conditions

ItemTypical rangeNotes
Leak investigation and repair$500 – $5,000Most single-source leaks land in the low four figures. Chronic leaks need a survey, not a patch.
Infrared or moisture survey$0.05 – $0.15 / sq ftMaps wet insulation so you replace only the saturated area instead of the whole field.
Preventive maintenance program$0.08 – $0.20 / sq ft / yrTwo inspections a year plus minor repairs. Usually required to keep an NDL warranty alive.
Tapered insulation for drainage$2 – $5 / sq ft (added)Where ponding has to be corrected rather than lived with.
Deck replacement$6 – $14 / sq ft (added)Only discovered once the old roof is off. Should be a unit price in your contract, not a change order fight.

How to read these. Ranges are DMV market pricing for planning and budgeting, not a quote. Real numbers move with deck condition, insulation required to hit code, access and staging, how much rooftop mechanical equipment has to be lifted and reset, and whether the work is phased around tenants.

Code

Four rules that decide most commercial roofing jobs.

You get two roofs, then you tear off

IBC §1511 prohibits a roof recover where the existing roof already has two or more applications of any roof covering. It also prohibits recovering when the existing roof is water-soaked or has deteriorated to the point that it is no longer an adequate base. In either case the code requires removal down to the deck. This is the single most common place a cheap bid quietly goes non-compliant.

Energy code drives the insulation, and the insulation drives the price

The DMV sits in climate zone 4. For low-slope roofs with insulation entirely above the deck, the IECC commercial table calls for roughly R-30 continuous. On an older building that was built with two inches of insulation, meeting that number is frequently the largest single line item in a replacement — and the reason a tear-off costs meaningfully more than the recover somebody quoted you.

Edges and corners are not the field

Wind uplift concentrates at perimeters and corners, and ASCE 7 requires tighter attachment in those zones. A bid that specifies one fastening pattern for the whole roof is either an oversight or a shortcut. Ask to see the zones called out.

Drainage is a code item, not a preference

Roofs need primary drainage plus a secondary (overflow) path sized so a blocked primary drain does not load the structure with standing water. On replacements we look at whether existing overflow scuppers are present and correctly set — on older DMV buildings they often are not.

Service areas

Where we work.

Washington, DCThe District has more commercial flat roof per building than almost anywhere in the country — a consequence of the Height Act — and a permitting and historic review layer that punishes contractors who have not worked here.Local codes & costs → Montgomery County, MDMontgomery County runs one of the more demanding permit and energy code regimes in the region.Local codes & costs → Prince George's County, MDPrince George's has the largest concentration of big-format industrial roof area inside the Beltway.Local codes & costs → Howard County, MDHoward County's commercial stock is unusually uniform in age — and that means an unusually large share of it hits end of roof life at the same time.Local codes & costs → Anne Arundel County, MDAnne Arundel puts two very different roofing problems in one county: a protected historic waterfront city, and a high-volume industrial corridor around BWI.Local codes & costs → Frederick County, MDFrederick has two permit counters, one of the largest historic districts in the country, and a life-science corridor with roofs that need specific membrane chemistry.Local codes & costs → Baltimore County, MDBaltimore County has some of the oldest industrial roof stock in the region, and a permitting authority that is entirely separate from Baltimore City.Local codes & costs → Arlington County, VAArlington is dense, vertical and permit-efficient.Local codes & costs → Alexandria, VAAlexandria is the DMV jurisdiction where the historic review process most often determines the roofing schedule.Local codes & costs → Fairfax County, VAFairfax has the largest commercial office inventory in Northern Virginia, and a very large share of it was built in one twenty-year window.Local codes & costs → Loudoun County, VALoudoun contains the densest concentration of mission-critical roof area in the world.Local codes & costs → Prince William County, VAPrince William is where the region's big-box distribution and retail roof area is still growing — and where roofs from the last building boom are now old enough to need decisions.Local codes & costs →

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