Spray On Insulation Attic Roof

The insulation reduces wildly high temperature spikes and so the attic becomes a conditioned part of the home like any other room.

Spray on insulation attic roof.

The blower should include two 50 ft. You ll also see another safety hazard and code violation. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. Use canned minimally expanding spray foam daptex plus window door foam sealant 7 for 16 ounces.

Similar to loose fill though this is a liquid that when applied becomes a durable layer of foam insulation. Roof attic insulation options costs and pros cons. If you don t have hvac and ducts in the attic spray foam on the roofline isn t really necessary. Your helper will feed the blown in insulation into the hopper while you work the hose up in the attic photo 5.

Hoses that you can connect and snake into the attic. One of the most common reasons to put spray foam on the roofline is to avoid having to air seal the attic floor because the attic is connected with the air in the house and indoor air is more humid than outdoor air which can cause moisture problems. It really should be called spray foam insulation and air barrier. It can be fairly messy so benefits from having experienced crew do the installation.

It has been said that insulating with spray foam insulation at the roof line will lead to moisture problems with the roof sheathing. The big disadvantage with spray foam is cost. Once you deal with the air up there this problem goes away with or without the insulation in the attic floor. I d blow insulation on the attic floor after air sealing of course.

Spray foam insulation is an incomplete name. You should never do this. Most unvented attics incorporate spray polyurethane foam spf on the underside of the roof deck and attic walls. The installer sprayed foam directly on the metal flues.

If you look closely you ll see two exhaust flues on the left side. When spray foam is installed on the underside of the roof deck the attic space is insulated from heat that otherwise would be entering the attic. It s generally 3 to 4 times what you ll pay for blown cellulose or fiberglass. Set the blower on a tarp on flat ground near the window or vent opening closest to the attic access.

This construction approach was first used in the 1970s and it has been implemented much more widely since it was first included in the international code council s icc model building code in 2007 irc section 806 4. To get a better air seal.