Spray On Insulation Attic Roof

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.

Spray on insulation attic roof.

You should never do this. If you look closely you ll see two exhaust flues on the left side. If you don t have hvac and ducts in the attic spray foam on the roofline isn t really necessary. The attic you see in the photo here is a different home but it does have one feature in common besides the spray foam.

I d blow insulation on the attic floor after air sealing of course. The big disadvantage with spray foam is cost. Roof attic insulation options costs and pros cons. Spray foam insulation is an incomplete name.

Use canned minimally expanding spray foam daptex plus window door foam sealant 7 for 16 ounces. It s generally 3 to 4 times what you ll pay for blown cellulose or fiberglass. To get a better air seal. You ll also see another safety hazard and code violation.

Once you deal with the air up there this problem goes away with or without the insulation in the attic floor. The installer sprayed foam directly on the metal flues. 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. It really should be called spray foam insulation and air barrier.

A properly done spray foam job not only insulates but also greatly reduces the air leakage of a home. 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. Your helper will feed the blown in insulation into the hopper while you work the hose up in the attic photo 5. Most unvented attics incorporate spray polyurethane foam spf on the underside of the roof deck and attic walls.

Unlike solid insulation products that require careful measurement cutting and fitting spray foam can cover even the most uneven surface instantly. The blower should include two 50 ft. Similar to loose fill though this is a liquid that when applied becomes a durable layer of foam insulation. It has been said that insulating with spray foam insulation at the roof line will lead to moisture problems with the roof sheathing.

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.