Do Attics Require Ventilation With Spray Foam Insulation

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

Do attics require ventilation with spray foam insulation.

Do attics with spray foam insulation need ventilation. They need the right level of ventilation but they also require insulation in order to help improve the energy efficiency of the property. This spray foam is applied as a low or high pressure two component polyurethane spray foam that can be applied onto walls in unvented attics to ducts and ceilings and in vented attics and crawl spaces. 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.

It s terrific because it s pretty much the same temperature as the rest of the house all the time. Here s the answer to the question posed in my article title. Nope you absolutely do not need to ventilate a spray foam house and here s why. Yes using spray foam we have added your attic to the conditioned space.

When we seal the attic with spray foam it s as tight as a butter tub. I have a spray foamed attic. Because basically now that attic is a conditioned space. The ventilation helps to keep the air fresh in the home the insulation stops warm air from escaping and cold air from leaking in.

Attic ceiling to stop airborne moisture from reaching a cold surface and condensing inside the building envelope in this design insulation effectively separates the interior and exterior spaces while slowing down moisture flow so the dewpoint is not achieved within.