Spray Foam Metal Roof Wood Purlins

Traditionally we ve insulated the roof panel to try and keep the temperature on the panel from reaching the dew point.

Spray foam metal roof wood purlins.

Metal sales classic rib inside closures 4 pack foam vented roof panel closure strip. Union corrugating metal solid roof panel closure strip. We ll add a vapor barrier so the moist air does not flow up through the insulation and condense on the roof. This type of assembly is designed to dry to the interior so the assembly should never include an interior polyethylene vapor barrier.

Personally i am hard pressed to see how it is the application of closed cell spray foam insulation on the interior of the steel roofing would influence the life of coatings on the exterior. It has red iron main frame with all 2x6 wood framing 16 on center on walls in between i beams and 8 steel purlin on roof. The problem with using. Of course everyone looks for an out when it comes to warranties and the reality is a good warranty protects the seller manufacturer far more than it.

For pricing and availability. But a preinstalled membrane may be even more effective at removing condensation. Install a layer of closed cell spray foam against the underside of the steel roofing or roof sheathing and fill the rest of the purlin cavity with an air permeable insulation. Spray foam directly on metal building barndominium i have a 30x60 metal building barndominium in the san antonio tx area.

For pricing and availability. There seem to be no chemicals in spray foam that could react with steel or the galvanized protective coverings on the metal siding and roofing panels. The insulation then attaches to the underlayment and should you ever have to remove a piece of metal for whatever reason you do not destroy the. Another thought if you plan to spray foam insulation onto the underside of a metal roof on purlins install some type of underlayment tyvek etc over the purlins before applying the metal.