Does A Finished Attic Need To Be Vented

But with spray foam ventilation is not an issue.

Does a finished attic need to be vented.

5 year old house finished attic. The insulation is spray foam open cell directly on the underside of the roof deck min r19 and on the inside of the exterior walls. To meet all three goals insulating your finished attic ventilating the roof and maximizing headroom use a combination of dense batt insulation rigid foam sheeting and air chutes. That is now a conditioned part of your house just like any room in your house.

However the designs need to be climate sensitive. Control of ice dams moisture accumulation and heat gain can be successfully addressed by both vented and unvented attic or roof design. Both vented and unvented attic roof designs can be used in all hygro thermal regions. You may not have heating ducts up there but it does not need to be ventilated.

Now we use attic ventilation when we use products like fiberglass because we have to manage the moisture. Permanent stairs carpet heat ceilings drywall completely finished. Ridge vent install ridge vent even though there won t be any air flow space in the majority of attic i e except behind knee walls which when i really think about it is a good amount of space. Most codes require a specified minimum amount of headroom and it s tough to meet this requirement when insulating a finished attic especially since most codes require insulation equal to r 38 or more.

Venting knee walls do you mean to take down the exposed insulation insert venting material to connect with vents to be cut into soffets reinsert insulation.