Across Northwest Pennsylvania, a lot of the problem roofs are low-slope: metal shops and pole barns, older main-street buildings with built-up roofs, churches, schools and commercial units that have been patched for years. They leak in the same places every spring because the problem isn’t one bad seam. It’s that the roof is made of seams.
Our Cochranton crew installs spray foam (SPF) roof systems that replace all of those seams with one continuous, insulating layer, protected by a weatherproof topcoat. Most go straight over the existing roof, with no tear-off and no time lost from the building.
SPF is spray polyurethane foam. It goes on as a liquid, expands into a rigid closed-cell layer and bonds to whatever is underneath it: metal, built-up, modified bitumen or single-ply. Once it’s cured, a silicone, acrylic or elastomeric topcoat seals it against UV and weather.
In Northwest PA, the best candidates are rusting metal roofs on shops and barns, and tired flat roofs on commercial buildings. Rather than stripping the old roof, we repair any wet or damaged areas and spray the new roof straight over. You get a new waterproof surface and a continuous layer of insulation in the same job.
The snow belt along the lake and the long winters inland put the same strain on low-slope roofs: heavy snow load, meltwater that can’t drain, and freeze-thaw cycles that open every lap a little further each year.
Spray foam has no laps to open. Because it goes on in passes, we can build extra thickness into low spots and taper it towards the drains, so water leaves the roof instead of sitting on it. On metal buildings, the foam locks every fastener and seam in place and stops the condensation that drips inside an uninsulated shop on cold mornings. At roughly R-6 to R-7 per inch, it also takes a real bite out of the heating bill.
And it’s light. Roofing foam adds a fraction of a pound per square foot per inch, so a recover doesn’t load up an old barn or shop the way a second roof of board and membrane would. With the snow some winters drop on Erie and Crawford County, that’s worth knowing.
If the deck is solid and the roof isn’t saturated, tearing it off is money you don’t need to spend. An SPF recover leaves the old roof in place and builds a new one over it.
What we won’t do is spray over a wet roof. Before we quote, we inspect the roof and run core tests and pull tests to decide between an overlay and a removal. Wet insulation and rotten decking come out and get replaced first. If the roof needs a full tear-off, we’ll tell you so.
On metal roofs, a recover is almost always possible. As long as the panels and purlins are sound, rust is treated, loose fasteners are tightened and the foam goes straight over the panels. The ribs and laps that leak on a metal roof disappear under one continuous surface.
Spray foam needs a topcoat, because UV breaks down bare foam quickly. We apply it the same day as the foam or shortly after. Silicone is our default on roofs that hold water after rain or thaw. Acrylic suits roofs that drain well and need to stay cool in summer.
Warranties run 5, 10, 15 and up to 25 years, with the term set by the topcoat type (acrylic, silicone or elastomeric) and its thickness. When it wears, the roof is cleaned and recoated, not replaced.
Look after the coating and it looks after the foam. Have the roof checked in spring and after big storms, keep the drains and gutters clear, and get any punctures sealed early. A small patch now saves a bigger repair once water has got into the foam.
Visual inspection, core tests and pull tests first, then repairs to any wet sections or damaged deck. On metal roofs, loose fasteners get tightened and rust treated before any foam goes down.
Then prep: the roof is cleaned, edges and equipment are masked, and curbs, drains and penetrations are detailed. The foam is sprayed in passes to the specified thickness, with extra build-up wherever we need slope, and the topcoat follows with extra coating at the details.
Most roofs take a few days, weather permitting, and the building keeps working underneath. SPF needs dry weather and moderate temperatures, so we schedule Northwest PA roofs through the warmer months.
We’ll agree the work area before day one. Rooftop intakes get covered while we spray, and vehicles or equipment parked close to the building are moved or covered. On farm buildings, we work around livestock and machinery access so the building stays usable.
Spray foam roofing is priced off the roof in front of us. The main factors are foam thickness, how much wet material has to come out first, how much detail work the roof needs around curbs, skylights and equipment, and the topcoat and warranty you choose.
Set it against a tear-off quote and count what you aren’t paying for: stripping, hauling and disposal, plus separate insulation. On a barn, shop or warehouse, the insulation alone is often what tips the decision.
Our Pennsylvania crew is based in Cochranton and installs SPF roofs across Cochranton, Meadville, Erie, Franklin, Grove City, Hermitage, New Castle, Slippery Rock and Titusville, plus the surrounding counties. For a building in New York, our Falconer crew handles SPF roofing in New York. For how spray foam roof systems work in more detail, see spray foam roofing.
We’ll inspect the roof, check for trapped moisture and give you a straight answer on whether spray foam is the right call. You’ll get a written quote with the foam thickness, topcoat and warranty spelled out. Call our Pennsylvania branch to book your free roof assessment.
