Roof Insulation Sizes

Insulation decreases the amount of heat entering from outside when it s hot and traps warmth inside when it s cold.

Roof insulation sizes.

It s light weight provides ease of handling. Some types of thicker foam board insulation are available but they may need to be special ordered. Working with home insulation boards insulation panels typically come in 4x8 foot sheets. Smaller sizes are also available.

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. See the department of energy s doe ranges for recommended levels of insulation below. Foam board insulation is easy to use and is a great diy way to add some insulation. They re much lighter and easier to work with than plywood sheets.

Rigid roof insulation board. 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 value measures how resistant types of insulation are to heat flow. Insulation is rated by its r value.

It comes in standard size 4 8 sheets and smaller sizes in many different thicknesses from 1 4 inch to 2 inches. For new construction use rigid boards to insulate slabs and the outside of foundation walls. R values vary based on the type thickness and density of the insulation material.