Air Seal Attic Joysts Spray Foam

Move in a steady stroke around the joist.

Air seal attic joysts spray foam.

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. 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. Closed cell spf is an effective thermal air moisture and vapor barrier. When properly applied to a thickness of one inch or more spray foam insulation is an effective air barrier preventing air leakage that creates drafty conditions and reduces energy efficiency.

Unvented attic assemblies unvented attics rely on an air impermeable insulation installed to the roof deck s underside i e. Clean product from the dispenser with a cloth and apply petroleum jelly one last time. Fold the bag over and stuff it into the open joist space under the wall a piece of rigid foam board sealed with spray foam also works well for covering open joist cavities. Keep in mind that foam cures in just 30 60 seconds.

If you have any holes or cracks in the space then the foam will penetrate the area to give you a better insulation experience. When we seal the attic with spray foam it s as tight as a butter tub. In a vented attic all of that expensive airflow is lost to the environment. When spray foam insulation is applied to your attic then you will create a fast seal thanks to the expansive nature of this product.

It provides a seal that is air tight. Push down on the ejector to remove the nozzle once spraying is complete. Hold the insta flow dispenser at least 6 inches from the spray area and pull the trigger when ready.