Roof Insulation Sizes

Working with home insulation boards insulation panels typically come in 4x8 foot sheets.

Roof insulation sizes.

Some types of thicker foam board insulation are available but they may need to be special ordered. It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. They re much lighter and easier to work with than plywood sheets. Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter.

Foam board insulation is easy to use and is a great diy way to add some insulation. For new construction use rigid boards to insulate slabs and the outside of foundation walls. Install them using panel adhesive or screws. Insulation decreases the amount of heat entering from outside when it s hot and traps warmth inside when it s cold.

Smaller sizes are also available. It s light weight provides ease of handling. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. R values vary based on the type thickness and density of the insulation material.

See the department of energy s doe ranges for recommended levels of insulation below. Composed of a closed cell polyisocyanurate foam core bonded in the foaming process to 1 2 thick duraboard an expanded perlite mineral aggregate board on one side and a fiber glass reinforced facer on the other. If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs.