Low-slope roofs that actually drain
Boston's triple-deckers, brownstones and mixed-use blocks sit under flat roofs. We replace and repair them with membranes chosen for the building, the deck above and the budget.
How we approach it
Most flat roof problems start with drainage: ponding water around a clogged scupper, a sagging joist bay or a roof deck built without crickets. Our flat roof crew fixes the slope first with tapered insulation, then installs heat-welded TPO, fully adhered EPDM or two-ply modified bitumen.
We work regularly with condo associations and property managers, including roof deck removal and reinstallation, rooftop HVAC curbs, and coordination with building occupants during the work.
The process, step by step
First
Survey
Core samples, drainage review and photos of every penetration.
Then
Specify
We recommend a membrane and insulation build-up for your building.
Next
Install
Old roof removed in sections, insulation and membrane installed and sealed daily.
Finally
Close out
Seam probing, flood check at drains and warranty paperwork for the association.
Why homeowners choose us for this
No ponding
Tapered insulation designed to move water to drains within 48 hours.
Energy savings
White TPO and added insulation cut summer heat gain on top-floor units.
Association ready
Scopes, certificates of insurance and schedules for boards and managers.
Deck friendly
Details that allow roof decks to be removed and serviced in the future.
What affects the price
Every roof is measured and priced in writing. These are the factors that move the number most.
| Factor | How it affects cost |
|---|---|
| Membrane type | EPDM is economical; TPO and modified bitumen cost more but suit decks and traffic. |
| Insulation | Tapered systems and code-required R-values add material cost. |
| Roof decks | Removing and reinstalling decks adds carpentry time. |
| Hoisting | Urban sites may need crane days or rooftop hoists. |
Sample price range
$780 to $1,450 per square installed (sample range)
Ranges are illustrative for this demo site. Your written estimate follows a free inspection.
Flat & Commercial Roofing: common questions
EPDM is proven and economical. TPO is our usual pick for roofs with decks or foot traffic because its welded seams are very strong. We will explain both on your roof.
We coordinate removal and reinstallation with our carpentry partners, or protect a deck in place when the design allows it.
Yes. We schedule noisy work in daytime hours and give residents written notice and daily updates.
Talk to us about flat work
A free photo inspection, a straight answer on repair or replacement, and a written estimate within the week.
Licensed and insured in Massachusetts. No-pressure estimates (sample).