Spray foam roofing in Edson is a recover system, sprayed over the low-slope roof that is already there and finished with a protective coating. On a commercial building in this town the argument for it starts with something simple: for a large part of the year nobody can see the roof at all.
A roof nobody can inspect from November to April
Snow arrives here and stays. That means a low-slope roof spends the worst months of the year under a layer that hides everything happening beneath it, and a problem that starts in December is generally discovered in April by the tenant underneath rather than by anybody on the roof. A seamless surface matters more under those conditions than it does in a climate where somebody can walk the roof once a month. There is nothing to come loose and nothing to check, which is the point.
The weather window is short and it decides the method
Application needs a dry deck and a workable temperature, and in Edson that is a genuinely limited part of the year. A tear-off makes that window the riskiest part of the project, because the building is open and the weather here does not give much notice. A recover leaves the existing roof in place as protection while the new system goes on, which is why it suits this town specifically rather than merely being cheaper. Where the survey shows the existing assembly is wet, that changes and the wet material has to go, and that is said before a price rather than after.
Snow load, and what a recover adds to it
Owners ask about weight, and it is a fair question when a roof is already carrying a serious seasonal load. The honest answer is that a sprayed foam and coating system is one of the lighter roof assemblies available, considerably lighter than another layer of conventional roofing, and that the structural question worth asking is about the snow rather than the roof. Where a building has a history of concern about load, that gets looked at first and the roofing decision follows it.
Where meltwater goes on a roof under trees
Drainage is the other half of it. Needles and cones come down onto these roofs all year, they collect at the drains and in the low spots, and they do not blow away. When the melt comes there is a lot of water arriving at once and it has to find a clear path. The survey looks at the drains and at where water sits after a thaw, and where the slope is wrong the foam can build it up toward the drain on the way through, which is one of the more useful things this system does.
Spray Foam Roofing Edson: Common Questions
Does the existing roof come off? Not usually. It stays in place as protection, unless the survey finds the assembly is wet.
Is it heavy? It is one of the lighter systems available. The load question here is about snow, not about the roofing.
When can it be done? The window is short in this town. It gets booked early rather than fitted in.
Size the assembly with the R-value calculator, then get a free Edson quote. More on Spray Foam Roofing Alberta.