Spray Foam Insulation Attic With Furnace

Compared to traditional insulation whether fiberglass or cellulose spray foam has the potential to provide better performance via its air sealing properties high r values per inch of thickness and in the case of closed cell spray foam ability to repel moisture.

Spray foam insulation attic with furnace.

High r value six per inch for closed cell air barrier no sagging so no air gaps air tightness 0 10 to 0 20 air changes per hour high shear and compressive strength when bonded to facing materials. To combat that a combination of spray foam and or batt insulation can be installed to keep heat in and reduce energy bills. Earlier this year i got a question about a home that had spray foam insulation in the attic. The good news is that some installers understand this problem and seek to address.

A lot of builders and homeowners are going with spray foam insulation because of the airtightness benefits but then the questioner mentioned that the spray foam contractor had intentionally left big holes to the outside by not sealing the gable vents. Nothing unusual about that. 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. You can downsize hvac equipment which will save you money when purchasing and operating the equipment.

However in a traditionally insulated attic insulation on the ceiling the attic is vented. Spray foam insulation for attics. Many homeowners love spray foam insulation and it s easy to understand why. I have witnessed in cases where cutting the size in half when using spray.

Heat rises and much of the heat your furnace or fireplace puts out into your home can escape into the attic and out through the roof of your home. Especially for roofs and attics. A while back i wrote about the incompatibility of putting an atmospheric combustion furnace in a sealed attic most often the attic is sealed by installing spray foam insulation at the roofline thus bringing the attic inside the building enclosure and turning it into conditioned space directly or indirectly. Most often the attic is sealed by installing spray foam insulation at the roofline thus bringing the attic inside the building enclosure and turning it into conditioned space directly or indirectly.

A while back i wrote about the incompatibility of putting an atmospheric combustion furnace in a sealed attic. With spray foam because it is both an air seal and an insulation it simply works better than other types of insulation. When we seal the attic with spray foam it s as tight as a butter tub.