Spray Foam Attic Insulation Ventilation

Actually you should probably get rid of power attic ventilators whether or not you re sealing the attic but that s another article.

Spray foam attic insulation ventilation.

A combination of air sealing and insulating the attic floor while providing ventilation considerably reduces potential for condensation as warm moist air is less likely to enter the space and condense on cold surfaces. Cathedral roofs especially need a lot more insulation between the ceiling and the rafters because there usually isn t any attic space. Spray polyurethane foam will provide thermal insulation that will minimize air infiltration which can help to save on heating and cooling costs within the indoor environment. One of the biggest benefits of using spray foam is to get greater airtightness.

Only spray polyurethane foam can be used for this application as batt insulation will end up sagging and blown insulation simply can t adhere to the roof decking. That means you get rid of all attic ventilation whether it s passive ridge gable soffit vents or active fans. A case of incompatibility. 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.

Oh and when you put it in your attic spray foam insulates the attic itself. Spray foam is eco friendly non toxic and thermally efficient. Air sealing also reduces the natural ventilation rate or air leakage rate further reducing heating and cooling loads. All insulation materials require proper venting.

Rigid foam and spray foam are two of them. The case for unvented attics. Spray foam from home logic is an excellent insulation type to choose for the attic. Spray foam is applied directly where it s needed ensuring that any ventilation vents are left untouched.

The spray foam expands on contact filling up the space where it begins working immediately. This application effectively seals off the attic from the outdoors and eliminates air leakage and infiltration through the attic and roof areas. Spray foam insulation has been increasing in popularity over the last several years due to. Heat from the house rises up to the attic but when there isn t one the heat rises up to the roof.

Becoming more affordable significant long term energy savings sealing restricts air movement through the building envelope.