Spray foam roofing in Lacombe is a recover system sprayed over an existing low-slope roof and finished with a protective coating. On this main street the roofs it goes on are hidden behind the fronts that everybody looks at.
Flat roofs behind a heritage parapet
The buildings on a street like this present a tall decorative front to the pavement and carry a nearly flat roof behind it. Nobody sees that roof, which is exactly the problem: it is not looked at, water collects against the back of the parapet where it cannot run off, and the first anybody knows about it is a stain on a ceiling inside. A seamless surface with no laps to work loose suits a roof that is out of sight, because there is nothing on it that needs checking.
Where the water goes on an attached row
These buildings share walls, and on an attached row the drainage is frequently shared too, or at least routed in ways that made sense to somebody decades ago. Water off one roof can end up crossing another, and a blocked outlet on one building shows up as a problem next door. The survey looks at the whole run rather than the single roof being quoted, because that is the only way to see what is actually happening.
Recovering rather than tearing off above a shop that is open
A tear-off puts a trading building under an open roof for a period, and on a street where every unit is somebody's business that is a serious proposition. A recover leaves the existing assembly in place as protection while the new system goes over it, so at no point is the building open and at no point does a shop have to shut. Where the survey finds the existing assembly is wet, that changes and the wet material comes out, and that is said before a price rather than after.
What the parapet and the flashings need
On an older Lacombe building the parapet is usually where the failures are, not the field of the roof. The cap, the flashing behind it, and the junction where the roof surface turns up the back of the parapet have all been repaired by several people over the years. Foam and coating can carry continuously up that upstand and remove the joint entirely, which is one of the more useful things this system does on exactly this kind of building.
Spray Foam Roofing Lacombe: Common Questions
Do we have to close the shop? No. It is a recover, done from above, and the building is never open to the weather.
Where do these roofs actually fail? At the parapet and its flashings far more often than in the middle of the roof.
Does the front of the building get touched? No. This is work on the roof behind the parapet, out of sight from the street.
Size the assembly with the R-value calculator, then get a free Lacombe quote. More on Spray Foam Roofing Alberta.