Spray Foam Roof Damage

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.

Spray foam roof damage.

The spray foam can also serve as the thermal and vapor control layers in both new and retrofit construction. The elastomeric coating on a spray foam roof naturally degrades after time. 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. This coating needs to be replaced.

Insulating with spray foam insulation at the roof line will cause moisture problems with the roof sheathing. How a spray foam roof handles hail damage as we saw before spray foam roofs will indent and the surface may crack when being exposed to hail. This phenomenon has been stopped with the inclusion of granule surfacing embedded into the top coat. The foam itself will also degrade and laminate over time.

This document provides a means to evaluate information collected from the investigation of an spf roof system after damage has occurred and to make recommendations for the rehabilitation and or repair of. Spray foam roofing repair for extensive damage. Spray foam roofing cons. One last point owens corning makes about spray foam insulation is that it can make detecting a roof leak harder.

When a roofing contractor sprays foam down it s usually about 1 5 inches thick. A natural disaster or intense hail storm can also cause extensive damage to your flat roof. Spfa 139 recommendations for repair of spray polyurethane foam roof systems due to hail and wind driven damage this document provides a means to evaluate information collected from the investigation of an spf roof system after damage has occurred and to make recommendations for the rehabilitation and or repair of the damaged areas. Despite the advantages of using spray foam under the roof deck there are some potential risks.

Early spray polyurethane foam roof designs were susceptible to occasional mechanical damage by birds crows and seagulls. Moisture problems in your attic can lead to mold as well as damage to the homes internal structure. This damage can usually be repaired economically and does not require the roof to be replaced. It s not coming from above the roof and it s not some new moisture source resulting from the spray foam.

A spray polyurethane foam spf roof to leak. Lstiburek takes blame for bad language. We ve seen some crazy hailstorms ones that ve made impacts as deep as inch. Atlas corporation technical bulletin for what they call under deck sprayed in place foam insulation.