How thick is Styrofoam insulation?

Answer Styrofoam home insulation sheets provide long-lasting insulation that is easy to install. The sheets come in varying lengths and widths, and according to, the most common thic... Read More »

Top Q&A For: How thick is Styrofoam insulation

How thick is r28 insulation?

An R-value indicates an insulation's resistance to heat flow. So, thickness will depend on the material used.

How Thick is R25 insulation?

R25 can be many different thicknesses. It depends on the insulation product. Styrofoam SM would need to be 5" thick. Pink fiberglass would need to be about 7" thick. White (beadboard) styrofoam wou... Read More »

How thick is R-30 ceiling insulation?

Owens Corning manufactures R-30 pink fiberglass insulation. It comes in various sizes, but the thickness for all sizes is 9/12 inch. It is available in widths from 15 1/2 inches to 24 inches and is... Read More »

How thick is R-38 cellulose insulation?

The R-value is a measure of how well a substance acts as insulation. Blown-in cellulose insulation has a value of about R-3.5 to R-3.7 per square inch. So to get R-38 protection, you'll need a laye... Read More »