R Value Of Rubber Roof

Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces.

R value of rubber roof.

The following table is in metric form. There are many websites on the internet which have imperial building material r value numbers but not so many with metric r value numbers. What r value do i need. Insulation level are specified by r value.

The higher the r value the better the thermal performance of the insulation. R value of building materials material r inch r thick ness fiberglass inch 3 00 1 inch 4 00 inch 6 00. R3 r18 r21 total roof r value. To learn more about r value see roof online s r value page.

R value is calculated by more than just the insulation. For a very good introductory overview article on r value see r values over at the website of. R value is a measure of insulation s ability to resist heat traveling through it. Recommended home insulation r values.

R value of various materials. The average r value for some common roof materials include. 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. Click here to go to our calculator to understand the real r value of a ceiling system or wall system with gaps in the insulation.

The increase r21 r3 exactly 18 the value by which you are increasing the r value. You should of course see the manufacturer provided technical data sheet for the r value of specific products. Calculate percent improvement in r value. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.

I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number. For instance if you have a material with an r value of 12 attached to another material with an r value of 3 then both materials combined have an r value of 15. The map and chart show each region of the u s the subsequent zones and corresponding r values. As we said before the r value measures the thermal resistance of a material.

Rubber pad 1 23 roofing materials asphalt shingles 0 44 wood shingles 0 97 windows single glass 0 91 w storm 2 00 double insulating glass inch air space. R value insulation chart find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.