Spray foam roofing, or SPF (spray polyurethane foam), is a complete roof system for flat and low-slope buildings. Two liquid components are mixed at the spray gun and expand on contact into a rigid, closed-cell foam that bonds to the deck or the old roof underneath. There are no seams and no laps, and no fasteners go through the waterproofing layer for water to find.
The foam is built up in passes, which means we can add thickness where the roof holds water and taper it towards the drains. Once it has cured, it gets a protective topcoat. That two-part build, foam for insulation and waterproofing and coating for UV and weather, is what separates an SPF roof from a coating on its own.
Our crews in Falconer, NY and Cochranton, PA install SPF roofs on warehouses, shops, pole barns, churches, schools and low-slope residential roofs across both states.
The foam goes straight over most existing roofs once they’re sound and dry. No dumpster, no open deck, and the building stays in use while we work.
Closed-cell foam adds roughly R-6 to R-7 per inch across the whole deck, with no gaps at the fasteners. You get a new roof and a warmer building in one job.
When the topcoat wears, the roof gets cleaned and recoated. The foam underneath stays put, so the roof doesn’t go back to zero every 20 years.
Every SPF roof is priced off the building, not a rate card, and four things move the number more than anything else.
Foam thickness. More inches means more insulation and more material, and roofs that need slope built in or a higher R-value need more of it.
The condition of the existing roof. Wet insulation has to come out before any foam goes down. Sometimes that’s a handful of patches and sometimes it’s a large section of the roof, and a moisture survey tells you which before we quote.
Detail work. Curbs, skylights, rooftop units, drains and parapet walls all take time to seal properly. A clean, open roof costs less per square foot than a busy one.
The topcoat and warranty term. A thicker coat with a longer warranty costs more upfront and less per year of service.
When you weigh it against a tear-off, remember the disposal costs you don’t pay and the insulation you get for free. That’s often what makes SPF the cheaper option over the life of the building.
Most roofing systems keep water out and do nothing for the heating bill. An SPF roof does both. Closed-cell spray foam runs at roughly R-6 to R-7 per inch, so every inch sprayed adds real insulation across the whole deck.
The number matters less than how it’s applied. Board insulation under a membrane is fastened through every few feet, and every one of those fasteners is a small cold spot. Foam is continuous. It also fills the gaps where walls meet the roof, around curbs and along the edges, which are the places conditioned air usually leaks out of a commercial building.
For a heated shop or warehouse in the snow belt, that shows up in the winter fuel bill. On a building that’s cooled in summer, a reflective topcoat over the foam keeps the roof surface far cooler than bare asphalt or rusting metal.
Most of our SPF roofs go on commercial and agricultural buildings: flat-roofed warehouses and offices, metal shops and pole barns, churches, schools and older main-street buildings with built-up roofs that have been patched for decades. Those roofs are big, flat and expensive to tear off, which is exactly where spray foam earns its keep.
Spray foam works on homes too. It suits porch roofs, additions, garages and low-slope sections that keep leaking at the same seams no matter how often they’re patched. It isn’t the right answer for a steep shingle roof, and we’ll tell you so.
Metal roofs are a strong fit. The foam seals every lap and fastener at once and stops the expansion and contraction that loosens screws. It also kills the condensation that drips inside uninsulated metal buildings every cold morning.
Foam adds very little weight, a fraction of a pound per square foot per inch, so it suits older structures where adding a heavy second roof would be a problem. It also handles light foot traffic for routine maintenance, though a roof with regular traffic around equipment should have walk pads.
The usual quote for a leaking flat roof is a tear-off. If the deck is sound, there’s often a cheaper route. An SPF recover goes straight over the existing roof once the wet sections are cut out and replaced, so you’re not paying to strip, haul and dump the old one.
That only works when the roof underneath is dry and the deck is solid. Foam sprayed over saturated insulation traps the water, and the roof fails from the inside. So we test before we quote. A visual inspection, core tests and pull tests tell us whether the roof can take an overlay or needs removing, and show us anything that has to be cut out first.
Existing foam roofs can be repaired too. Small punctures, bird damage and worn topcoat areas get cleaned, filled with foam or sealant and recoated. If an older foam roof has been left uncoated and the foam has started to break down under UV, we’ll tell you whether it can be saved or needs a new layer.
Foam doesn’t like sunlight. Left bare, UV breaks down the surface within months. Every SPF roof we install is sealed with a silicone, acrylic or elastomeric topcoat, applied the same day as the foam or shortly after.
Silicone is our usual choice on roofs where water ponds after rain or snowmelt, because it holds up to standing water better than most coatings. Acrylic is highly reflective and cost-effective on roofs that drain well.
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 the coating reaches the end of its life, the roof is cleaned and recoated, not torn off. For silicone and acrylic restoration coatings on roofs that don’t need foam, see our roof coating services.
We run two crews. Our New York crew works out of Falconer and covers Jamestown, Ellicottville, Gowanda, Hamburg, Olean, Mayville, Fredonia and the rest of Chautauqua and Cattaraugus County. See SPF roofing in New York.
Our Pennsylvania crew is based in Cochranton and covers Meadville, Erie, Franklin, Grove City, Hermitage, New Castle, Slippery Rock, Titusville and the surrounding counties. See SPF roofing in Pennsylvania.
Both regions get the same weather problem: heavy snow load, long freeze-thaw seasons and roofs that hold meltwater well into spring. That’s the climate SPF handles best, because a seamless, sloped surface gives that water nowhere to get in.
Tell us about the building and we’ll come and look at the roof. We check the deck, survey for trapped moisture and measure up the details, then give you a written quote with the foam thickness, topcoat and warranty term spelled out. If your roof isn’t a good candidate for spray foam, we’ll say so and tell you what we’d do instead. Book your free SPF roofing assessment with the branch nearest you.
