Spray Foam Insulation Roof Problems

Improperly applied spray foam often contains voids where the foam does not completely cover.

Spray foam insulation roof problems.

Spray foam insulation problems there are several majors spray foam installation problems that have been associated with the use and application of spray foam in a home some of these problems will vary based on how much of the spray foam is used where it is placed who applies the spray foam and the conditions in this environment. Lstiburek takes blame for bad language. Poor application of the spray foam insulation. The poor application of spray foam insulation by an untrained or.

Moisture generated indoors or that infiltrates into the home is responsible for the bulk of the moisture in an attic insulated with spray foam on the underside of the roof sheathing. In other words the spray has not been used in the right way or the mixture is not right for the location. Even small gaps can allow the passage of warm air through the foam rendering the foam all but useless as an insulator. It s not coming from above the roof and it s not some new moisture source resulting from the spray foam.

Older spray foam insulations such as uffi urea formaldehyde foam insulation may crumble and break down. Insulating with spray foam insulation at the roof line will cause moisture problems with the roof sheathing. In an unvented attic scenario to limit air leakage as well as any associated condensation at the roof line a continuous air barrier is required. In both cases the quick fix of a spray on foam then looks a good way to resolve the problems with the sales techniques being that is cures roof leaks greatly improves insulation which is always a problem when you live in an older property as you suddenly realise how much heat is needed to keep it warm.

Since there are dozens of brands of spray foam insulation. Almost all of the problems associated with spray foam roof insulation comes down to incorrect application. To get the best performance out of spray foam insulation you must cover the roof rafters and surrounding areas as thoroughly as possible. The spray foam insulation.