Spray foam roofing in Wainwright is a low-slope proposition. It is for the flat and nearly flat roofs on the older downtown buildings, on single-storey commercial and institutional stock, and on additions with a membrane rather than shingles. It is not an alternative to a shingled roof on a house, and anybody offering it as one has misunderstood the product.
What a sprayed roof is
Closed-cell foam applied over the existing roof surface, built up to the required depth, then covered with a protective coating. It becomes the insulation and the waterproofing in one assembly. The reason that matters on an old low-slope roof is seams: a conventional membrane roof leaks at its laps, its flashings and its penetrations, and a sprayed application has none of those. It goes up over the parapet, around the curbs, around the vents and the drains in one continuous pass, which is exactly where a patched roof has been failing.
It can be sloped where the roof is not
The common fault on an older flat roof is standing water, because the deck has deflected over decades and the water no longer reaches the drains. Foam can be applied at varying depth to create fall towards the drains, which is something no sheet product can do without a separate tapered insulation layer. On a building where the roof is otherwise sound but holds water in the middle, that is often the specific reason to choose this system.
The coating is the roof's service life
This is the part that has to be said plainly. The foam does the insulating and the sealing; the coating protects the foam from ultraviolet light and from physical damage, and it is a maintenance item with a service interval. A sprayed roof that is inspected and recoated on schedule performs for a long time. One that is sprayed and forgotten will chalk, erode and eventually let water into the foam. Choosing this system means accepting a maintenance cycle, and an owner who will not do that is better served by something else.
Prairie exposure and what the roof has to take
Low-slope roofs here deal with a sustained wind, dry snow that drifts and loads unevenly rather than settling flat, long periods of sustained cold with no thaw, and strong sun in summer. Wind uplift at the perimeter and the parapet is the detail that matters most for attachment, and because a sprayed application adheres across the whole surface rather than being fastened at intervals, it does not have the same edge vulnerability as a mechanically attached sheet. Drifting on a roof with parapets also means snow load is not evenly distributed, which is a structural question to settle before adding anything to the roof.
When it is the wrong answer
On a steep-slope roof. On a deck that is structurally unsound, where the real job is the deck. Where the existing roof holds a lot of trapped water, which has to be removed rather than sprayed over. And where the owner wants a system that needs nothing done to it for twenty-five years. We would rather rule a building out at the quote stage than spray a roof that was always going to fail.
One company, start to finish
For spray foam roofing Wainwright, we quote and manage the whole job and our own installers do the work. The free quote comes from the people who will be on site.
Spray Foam Roofing Wainwright: Common Questions
Can spray foam go over my shingles? No. This is a low-slope system. A sloped shingled roof is a different trade and foam does not belong on it.
Does the old roof have to come off? Often not, which is part of the appeal. But trapped water and unsound areas have to be dealt with first, and that is determined by inspecting the existing roof rather than assuming.
How does it fix standing water? It can be built up at varying depth to create fall towards the drains, so the water goes where it was supposed to go in the first place.
How much does spray foam roofing cost in Wainwright? Priced over the roof area at the depth required, plus the coating system, plus any repair to the existing roof and deck. The recoat cycle is a future cost that belongs in the comparison.
How do I choose a spray foam roofing contractor in Wainwright? Ask about the coating and the recoat interval, and ask what they will do about the parapet and the drains. A quote that treats the coating as optional is pricing half a roof.
Size the assembly with the R-value calculator, then get a free Wainwright quote. More on Spray Foam Roofing Alberta province-wide.