An insulation R-value chart refers to a table that lists the levels of insulation recommended for different climates and for different areas in the home, according to Energy Star. Some R-value tables detail the specific R-values and other properties of different insulation types or building materials, illustrates Inspectapedia.Continue Reading
The R-value expresses a material's thermal performance, a measure of the insulation’s ability to resist heat, explains Energy Star. More specifically, the R-value is the calculated thermal resistance, which measures the insulating material's resistance to conductive heat flow, according to the U.S. Department of Energy. Insulation with a higher R-value is more resistant to heat flow and insulates more effectively.
The type, thickness and density of an insulation's material affect its R-value, explains the U.S. Department of Energy. The insulation's ability to provide its full rated R-value depends on its installation. Overall R-value varies by location of the building as well by manner of installation. Compressed insulation is less effective, as is insulation located in a wall, since heat is lost trough studs and building materials.
One uses an insulation R-value chart to find the amount of R-value needed for the type of insulation material, climate, type of heating system and part of the building to be insulated, notes the U.S. Department of Energy.Learn more about Building Materials