Roof Insulation R Value Chart

R value of various materials.

Roof insulation r value chart.

Recommended home insulation r values. Understanding r value thursday december 13 2018 what does r value mean. Rosato asbestos insulation is the most authoritative source on asbestos properties and gives data for the thermal conductivity of asbestos in different forms and with varying temperatures for magnesia asbestos insulation at mean temperatures ranging from 100 f to 400 f the k value thermal. The higher the r value the better the thermal performance of the insulation.

Polyiso insulation thickness r value chart. Notes on the r value k values of different forms of asbestos. 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. You should of course see the manufacturer provided technical data sheet for the r value of specific products.

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. Insulation level are specified by r value. To learn more about r value see roof online s r value page. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

For a very good introductory overview article on r value see r values over at the website of. The table below shows what levels of insulation are cost effective for different climates and. Notes to the table above.