Foam Attuc Insulation Vs Attic Fan

However in a traditionally insulated attic insulation on the ceiling the attic is vented.

Foam attuc insulation vs attic fan.

Topshot oct 4 16 at 16 34 also if you have any air gaps behind the foam and any way for air to flow in and out of that space your insulation value is reduced to near zero. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic. If you don t have hvac and ducts in the attic spray foam on the roofline isn t really necessary. I d blow insulation on the attic floor after air sealing of course.

The alternative would be to install an attic fan that would draw cooler outside air into the attic while expelling the hot air. It has been said that insulating with spray foam insulation at the roof line will lead to moisture problems with the roof sheathing. 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. For diy attic insulation you ve got two choices.

Whereas too little spray foam insulation can leave for thermal bypass because of the complete lack of insulation in the attic. Affix rigid foam insulation to the attic side of the hatch or door. Direct all exhaust fans and vents to the exterior. 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.

Get tips on installing sufficient attic ventilation to vent the air that gets pulled up there. Attic hatch or door. 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. When we seal the attic with spray foam it s as tight as a butter tub.

Loose fill or batt the common term for blanket insulation. In a new home spraying foam in the roofline can bring the ducts inside the envelope without having to redesign the system and house. We d only use one or the other. Nothing unusual about that.

If we assume that the outside air is 10 f warmer than the desired. 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. Find out whether you have to worry about an attic fan blowing your insulation around. If you have air conditioning and you use an attic fan you tend to suck the air conditioning out of the house as well.