Ridgid Foam On Attic Roof

Rigid foam insulation also known as insulating boards provide high r values.

Ridgid foam on attic roof.

It can be applied on the roof floor and walls and it s most widely used in structural insulated panels and insulated concrete forms. The spray foam is on the underside of the roof deck. Strip the old roof lay down ice and water membrane add the foam overlapped screw down the 2x4 s add sheathing. Not on the floor of the attic.

Eps is by far the most versatile of the three rigid insulation options. You can even place it under the foundation slab. The superattic system utilizes proprietary silverglo rigid foam insulation panels to fully seal and insulate the attic directly beneath the roof rafters and directly inside the gable ends. Rigid foam under roof sheathing indydog.

So picture this if your in the attic and lay down on your back. Performance imperatives for high r value roof retrofit using insulating sheathing above the roof deck plus cavity insulation in roof framing. Get free shipping on qualified attic foam board insulation or buy online pick up in store today in the building materials department. Eps is also the most inexpensive of the three types of rigid foam insulation while also meeting the required building and energy codes.

They keep your home at a comfortable temperature without the need to crank your heat. Effective water control is essential to the performance of any attic roof system. You might as well put the rigid foam in the branches of a tree in your back yard. I agree with the comment that it sure is a lot of work for so little insulation our standard approach would be about 8 inches of xps screwed thru 2x4 s laided flat with timber loks.

The attic is inside the thermal envelope and all the mechanicals and electrical are free and clear less a few wires that go. If you have a vented attic it makes no sense to install rigid foam above the roof sheathing. Measure the length and width between two rafters in your attic and transfer the measurements to a 4 ft by 8 ft of rigid foam insulation board. Look up and from eave to eave there is foam insulation but none below you.

Install it anywhere from the roof to the foundation. A vented attic is basically outdoors so installing rigid foam above your roof sheathing is a waste of money and a waste of rigid foam.