Ceiling Roof Insulation Foam
Looking upward through the open ceiling if the exterior wall and roof deck assemblies both contain spray foam then a continuous insulation and airtight layer is established from the base of the walls to the peak of the roof.
Ceiling roof insulation foam. If you decided to use a rigid foam board to help insulate your cathedral ceiling you would install the board on top of the roof sheathing and underneath the plywood at the top of the roof. Technically known as spray polyurethane foam or spf spray foam is most commonly applied in the space between attic rafters. Find ceiling foam board insulation at lowe s today. Foil faced iso board can be cost effective insulation for finished attics and cathedral ceilings.
Even though your attic is large this makes sense because you don t want to install your ducts or hvac equipment outdoors. They keep your home at a comfortable temperature without the need to crank your heat. Better materials for attic roof insulation are rigid foam boards and spray foam insulation. You can even place it under the foundation slab.
Foam board insulation is easy to use and is a great diy way to add some insulation. Dow froth pak 620 sealant foam insulation kit. Rigid foam board installation in the case of a cathedral ceiling involves installing three different layers that are each 1 5 inches thick according to the procedure discussed in this article appearing in fine homebuilding. Install it anywhere from the roof to the foundation.
It can act as an air and moisture barrier in addition to providing very high r value. Foam board insulation would be a more economical especially if you are supplying the labor see photo. Rigid foam insulation also known as insulating boards provide high r values. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches.
Image courtesy of d7 spray foam insulation houston tx. Some types of thicker foam board insulation are available but they may need to be special ordered. Rigid insulation is one of the best tools to reduce your energy costs. Spray foam is a very expensive option however.