Spray On Insulation Attic Roof

A properly done spray foam job not only insulates but also greatly reduces the air leakage of a home.

Spray on insulation attic roof.

It s generally 3 to 4 times what you ll pay for blown cellulose or fiberglass. Spray foam insulation is an incomplete name. Polyurethane or polystyrene spray foams can provide thorough coverage to roof rafters and attic walls in much less time than is needed for other materials. You ll also see another safety hazard and code violation.

Similar to loose fill though this is a liquid that when applied becomes a durable layer of foam insulation. You should never do this. It really should be called spray foam insulation and air barrier. 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.

The big disadvantage with spray foam is cost. Roof attic insulation options costs and pros cons. It can be fairly messy so benefits from having experienced crew do the installation. The insulation reduces wildly high temperature spikes and so the attic becomes a conditioned part of the home like any other room.

To get a better air seal. 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. Hoses that you can connect and snake into the attic. Set the blower on a tarp on flat ground near the window or vent opening closest to the attic access.

Use canned minimally expanding spray foam daptex plus window door foam sealant 7 for 16 ounces. The attic you see in the photo here is a different home but it does have one feature in common besides the spray foam. If you don t have hvac and ducts in the attic spray foam on the roofline isn t really necessary. If you look closely you ll see two exhaust flues on the left side.

I d blow insulation on the attic floor after air sealing of course. 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. Once you deal with the air up there this problem goes away with or without the insulation in the attic floor.

Your helper will feed the blown in insulation into the hopper while you work the hose up in the attic photo 5. Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly.