Foam Attuc Insulation Vs Attic Fan

One of the most hotly contested debates in the world of attic insulation is the question fiberglass or spray foam whereas fiberglass has been a classic go to staple insulated in american homes for several decades now spray foam is the en vogue new kid in the neighborhood generating all the latest buzz.

Foam attuc insulation vs attic fan.

Add weatherstripping around the perimeter and a sweep to the door of a walk up attic. Find out whether you have to worry about an attic fan blowing your insulation around. I d blow insulation on the attic floor after air sealing of course. However in a traditionally insulated attic insulation on the ceiling the attic is vented.

Moisture is also another huge issue when it comes to spray foam insulation in an attic. Get tips on installing sufficient attic ventilation to vent the air that gets pulled up there. If you don t have hvac and ducts in the attic spray foam on the roofline isn t really necessary. When we seal the attic with spray foam it s as tight as a butter tub.

If you have air conditioning and you use an attic fan you tend to suck the air conditioning out of the house as well. Signs that your attic insulation is subpar include drafts uneven temperatures between rooms high heating cooling bills and ice dams in the winter i e those pretty icicles that hang from the. If we assume that the outside air is 10 f warmer than the desired. 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.

Nothing unusual about that. Affix rigid foam insulation to the attic side of the hatch or door. We d only use one or the other. 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.

It has been said that insulating with spray foam insulation at the roof line will lead to moisture problems with the roof sheathing. If planning to insulate the attic ceiling you could use the former though the foam in the top pic likely has fiberglass under it too. Earlier this year i got a question about a home that had spray foam insulation in the attic. The alternative would be to install an attic fan that would draw cooler outside air into the attic while expelling the hot air.

For diy attic insulation you ve got two choices. Loose fill or batt the common term for blanket insulation. Attic hatch or door. Whereas too little spray foam insulation can leave for thermal bypass because of the complete lack of insulation in the attic.