Metal Building Roof Insulation Details

My question is if i install a metal roof could i eliminate the second layer of sheathing.

Metal building roof insulation details.

Bar joist buildings are often times insulated on the underside of the roof deck to increase the building s energy efficiency. Insulation can be placed over the top of the roof purlins and or wall girts prior to the exterior metal panels being installed. Both materials make a great physical barrier between the interior building and the metal roof. Fabral s translucent panels are intended for siding applica tions only.

Our metal building insulation is composed of inorganic glass fibers bonded with a thermoset resin formed as a flexible uniformly textured tan blanket insulation and furnished in rolls. Porous insulation materials may absorb and retain moisture and should not be used in direct contact with metal panels. Metal building leak repair metal roof cut and paste. It s not only an improved product with new advantages but also continues to comply with all industry standards and provides equivalent thermal performance.

The fiberglass rolls are essentially sandwiched between the interior metal and the exterior sheeting. Metal panels and any potentially corrosive materials should be pre vented. Most details show a second layer of sheathing on top of foam then the roofing material. The most common material used for an insulating metal roof is fiberglass batts or glass mineral wool.

Fiberglass batts or glass mineral wool metal roof insulation. The fiberglass insulation starts to hold water and starts rusting the roof from the bottom. It won t leak at first unless its a very heavy rain but the roof is being damaged. Below is how you would determine how much insulation is needed for a 60x80x16 metal building.

Porous insulation materials may absorb and retain moisture and should not be used in direct contact with metal panels. Metal bar joists vary in depths and shapes therefore attaching the insulation to the bar joist building can prove to be limited in comparison to a common metal building. Each area is done independently because each requires a different formula. The vapor barrier is faced towards the inside of the building giving the building a clean finished look.

The batts are located side to side on the rafter of the roof. Computing how much insulation you will need involves calculating both the perimeter wall and the roof areas separately. Get the most out of your insulation materials with owens corning. Install furring and 2 4 purlins instead of the sheathing.

Our new ecotouch insulation with purefiber technology for metal buildings provides exceptional thermal and acoustical performance and is energy efficient formaldehyde free and made with natural materials. Use a vapor barrier such as polyethylene plastic or 30 lb felt to prevent moisture from contacting both the insulation and the metal panel. 60 60 80 80 280.