Definition:
R-Value is a measure of the resistance of a material or assembly to heat flow. Used as a measure of the insulating capabilities of a material. It is the inverse of the U-Factor (R = 1/U). A high window R-value has a greater resistance to heat flow and a higher insulating value. You want the R-Value to be a high number and the U-Factor to be a low number.
R-Value is a measure of the resistance of a material or assembly to heat flow. Used as a measure of the insulating capabilities of a material. It is the inverse of the U-Factor (R = 1/U). A high window R-value has a greater resistance to heat flow and a higher insulating value. You want the R-Value to be a high number and the U-Factor to be a low number.
