Question

what is r value? how to get the r value? and what is the importance of it?

Answer 1

R-value (also known as R-factor) is relevant in terms of insulation used around the window during installation; this includes the use of caulking and insulation around the window where it meets the walls of the building. The higher the R-value of any material, the greater the insulating value. It’s important to understand that when it comes to windows, U-value takes more than conduction of heat into consideration: It also considers airflow or convection around the window and the amount of radiated or reflected heat off the glass.

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Answer 2

Answer:

The R-value per unit of a barrier's exposed surface area measures the absolute thermal resistance of the barrier. , quantifies the temperature difference per unit of heat flow rate needed to sustain one unit of heat flow rate.