Roof Insulation R Value Chart

The following table provides typical r values and rsi for various materials these r values were taken from manufacturer technical data sheets and are the reported r values per inch of actual products.

Roof insulation r value chart.

You should of course see the manufacturer provided technical data sheet for the r value of specific products. The table below shows what levels of insulation are cost effective for different climates and. Polyiso insulation thickness r value chart. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.

These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Recommended home insulation r values. For a very good introductory overview article on r value see r values over at the website of. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.

To learn more about r value see roof online s r value page. Insulation level are specified by r value. A higher r value means that the insulation will do a better job of holding in conditioned air whether that s heat in the winter or cool air in the summer. The higher the r value the better the thermal performance of the insulation.

R value of various materials. Notes on the r value k values of different forms of asbestos. Notes to the table above.