Spray Foam Insulation On Attic Ceiling

If you look closely you ll see two exhaust flues on the left side.

Spray foam insulation on attic ceiling.

The insulation reduces wildly high temperature spikes and so the attic becomes a conditioned part of the home like any other room. Most unvented attics incorporate spray polyurethane foam spf on the underside of the roof deck and attic walls. How to insulate your attic with foam it green spray foam kits are quicker and easier to use plus you get a seamless air barrier and high r value in just 1 inch. Installing insulation attics one of the high tech insulation products being utilized these days is a foam spray product called icynene which is a foam that starts as two liquid components a and b if you will that are heated up and sent through two hoses and meet at a tip of a gun where the magic begins.

However in a traditionally insulated attic insulation on the ceiling the attic is vented. The installer sprayed foam directly on the metal flues. Using icynene spray foam as your attic insulation will turn your attic into a conditioned space. The attic you see in the photo here is a different home but it does have one feature in common besides the spray foam.

You ll also see another safety hazard and code violation. Thus the air in the attic is connected with the air in the house. It will also help keep any duct leaks within the conditioned space of your attic. 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.

Moisture is also another huge issue when it comes to spray foam insulation in an attic. 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. Choose foam it green spray foam insulation kits and don t settle for less than you deserve. If you leave the insulation in the attic floor after insulating the roofline the attic will be cooler in winter than if you remove the insulation.

One huge benefit of the spray foam insulated attic is that conditioned air leakage from the ac furnace duct system is contained and used to condition the attic. Whereas too little spray foam insulation can leave for thermal bypass because of the complete lack of insulation in the attic. But a common reason to put spray foam on the roofline is to avoid having to air seal the attic floor. When we seal the attic with spray foam it s as tight as a butter tub.