Foam insulation board also comes with a foil backing and when the foil is just on one side of the board you have a decision to make regarding its orientation.
Insulating an attic with foam board.
Install it anywhere from the roof to the foundation.
Rigid foam insulation also known as insulating boards provide high r values.
Polyisocyanurate is another option coming in as the densest and more expensive option for foam board.
Affix rigid foam insulation to the attic side of the hatch or door.
You can use foam board in the attic.
Add weatherstripping around the perimeter and a sweep to the door of a walk up attic.
You can even place it under the foundation slab.
It is an excellent installation option for the attic because it is lightweight easy to work with and offers high r values.
To attach the insulation you can use screws with large washers a special adhesive made for adhering foam board insulation or for smaller pieces you can seal them in with caulk or spray foam.
Foam board insulation is easy to cut with a circular saw with a masonry blade or scored with a utility knife and snapped like you would drywall.
Foil faced iso board can be cost effective insulation for finished attics and cathedral ceilings.
Rigid insulation is one of the best tools to reduce your energy costs.
Attic hatch or door.
Typically sold as sheet insulation in a standard size of 4 x 8 foam insulation panels can help reduce energy costs get a handle on moisture control and more.
Installing foam insulation boards in the attic is no that hard and can save you money compared with professional installation.
Spray foam is a very expensive option however.
Shop at lowe s to find the foam sheeting you need for your next insulation project.
Foam board insulation would be a more economical especially if you are supplying the labor see photo.
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.