Because basically now that attic is a conditioned space.
Spray foam ceiling or roof.
Spray foam is used to seal the ceiling plane in an airtight manner figure 8.
The spray foam creates an airtight bathtub that is then filled with air permeable insulation such as fiberglass or cellulose.
Nope you absolutely do not need to ventilate a spray foam house and here s why.
It s terrific because it s pretty much the same temperature as the rest of the house all the time.
You can install spray foam on the underside of the roof sheathing to create an unvented conditioned attic.
Using spray foam products.
Even though your attic is large this makes sense because you don t want to install your ducts or hvac equipment outdoors.
It has less chemical off gassing during application.
Eco spray foam insulation.
I have a spray foamed attic.
It is critical to provide air sealing at the perimeter to control wind washing of air permeable insulation.
Products with a higher r value provide greater insulation.
Installing insulation attics one of the high tech insulation products being utilized these days is a foam spray product called icynene which is a foam that starts as two liquid components a and b if you will that are heated up and sent through two hoses and meet at a tip of a gun where the magic begins.