Foster, RI Commercial Flat-Roof Replacement — New Membrane on a Working Farm Building

Like most Pinnacle projects, the work was completed efficiently — minimizing disruption for the property owner.

Pinnacle makes every project affordable with monthly financing options, including 0% interest for 18 months.

On Mill Road in Foster, the owner of a commercial farm building needed a lasting answer for a low-slope roof that had simply worn out. Years of ponding water, brittle seams, and a hard New England freeze-thaw cycle had pushed the flat section past the point of patching, and leaks were starting to threaten what was stored below. Pinnacle Roofing & Skylights was called in to strip the failing roof back to a sound substrate and install a fully-adhered single-ply membrane system engineered for exactly this kind of low-slope commercial exposure.

Scope of Work

Our commercial roofing crew began by clearing the old low-slope roof and inspecting the substrate for soft spots, moisture, and any deck damage that had to be corrected before a new membrane went down. We addressed the substrate, set a self-adhered base layer for a clean bond, then rolled out and fully adhered the single-ply membrane across the field of the roof. Seams were welded and rolled tight, and every penetration and the brick chimney were detailed with proper flashing so water has nowhere to work in. We finished with a full cleanup of the grounds around the building.

What We Installed (And Why)

The building received a fully-adhered single-ply membrane roof — the right system for a low-slope commercial structure where a steep-slope shingle simply won’t shed water. A self-adhered base layer was set first to create a stable, uniform bond, and the membrane was adhered across the entire field so there are no mechanical fasteners puncturing the deck and no loose areas for wind to lift. The membrane forms one continuous, watertight surface designed to flex through Rhode Island’s temperature swings without cracking or splitting.

The details are where a flat roof lives or dies, so we gave them the most attention. Seams were heat-welded and inspected, the base of the brick chimney was flashed and sealed, and each rooftop penetration was wrapped and terminated so the whole assembly drains and stays sealed as a single system. On a working farm building, that continuous membrane and clean flashing work is what keeps the interior dry season after season — not a coat of sealant hiding an old, tired roof.

Project Photo Gallery

flat membrane roof and chimney

barn exterior with brick chimney

red farmhouse exterior

Good To Know: Why does a flat commercial roof need a membrane instead of shingles?

Shingles are built to shed water fast down a steep slope; on a low-slope or flat roof, water lingers, and that standing moisture will find its way under any lapped, seamed product. A fully-adhered membrane solves that by covering the roof as one continuous waterproof sheet with welded seams and flashed penetrations, so there are no shingle courses for water to back up under. That is why nearly every flat commercial and agricultural building is roofed with a membrane system rather than shingles.

Why This Approach Works

A commercial flat roof is only as good as its weakest seam and its flashing details, which is why we treat the substrate prep, the adhered base, and the terminations as one connected system rather than a stack of separate steps. Fully adhering the membrane eliminates the wind-uplift and fastener-leak risks that plague loose-laid or mechanically attached roofs, and welding every seam turns dozens of joints into a single watertight surface. Done this way, the roof protects the building for the long haul and stands up to the freeze-thaw punishment a Rhode Island winter delivers.

Why Pinnacle

Commercial low-slope work demands specific credentials, and Pinnacle carries them: we are a Mule-Hide & Gaco Licensed Applicator and Firestone Building Envelope Certified, so membrane and coating systems are installed to manufacturer standard by a crew that does this for a living. We’ve been serving Rhode Island since 2012, hold RI Commercial License #261, and are members of the NRCA and RIBA. Property owners lean on our 5.0-star Google rating with 100+ five-star reviews and our BBB A+ rating because they want a flat roof done once and done right.

Foster, RI

Foster is one of Rhode Island’s most rural corners, a spread of working farms, wood lots, and historic homesteads along winding country roads in the state’s northwest. Buildings here take the full brunt of the weather with little shelter, so a roof that can handle ponding, wind, and hard winters really matters. Pinnacle is proud to bring commercial-grade roofing to Foster property owners who need their working buildings to stay dry.