Spray Insulation Attic Ventilation

Spray foam is applied directly where it s needed ensuring that any ventilation vents are left untouched.

Spray insulation attic ventilation.

In heating and cooling climates this moisture could potentially travel through fibre insulation in building cavities. Because basically now that attic is a conditioned space. Insulation is used in an attic for cross ventilation to minimize potential for moisture accumulation and condensation to help energy savings and moisture control. I have a spray foamed attic.

One of the biggest benefits of using spray foam is to get greater airtightness. 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 from home logic is an excellent insulation type to choose for the attic. Oh and when you put it in your attic spray foam insulates the attic itself.

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. 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. Nope you absolutely do not need to ventilate a spray foam house and here s why. Nothing unusual about that.

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. Open cell spray polyurethane foam or closed cell spray polyurethane foam ccspf insulation can be sprayed along the underside of the roof sheathing to provide a conditioned and insulated attic space that can be durable and efficient in all climate zones see figure 1. However in a traditionally insulated attic insulation on the ceiling the attic is vented. The spray foam expands on contact filling up the space where it begins working immediately.

Traditional methods of insulation materials and design call for using air circulation within the attic space to assist in drying excess moisture. Earlier this year i got a question about a home that had spray foam insulation in the attic. That means you get rid of all attic ventilation whether it s passive ridge gable soffit vents or active fans. It s terrific because it s pretty much the same temperature as the rest of the house all the time.