Highest R Vallue Roof

Energy and the environment.

Highest r vallue roof. Note that the r value of this insulating board is increased to r 9 3 per inch if construction includes a 3 4 air space. 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. Insulation level are specified by r value. You should of course see the manufacturer provided technical data sheet for the r value of specific products.

Therefore the doe s value is on the high end of the r value of a log wall. R value of various materials. A high r value system is commonly referred to as a double layer system. These are closed cell polyisocyanurate insulating foam core board products.

Steel bands are installed on the underside and perpendicular to the roof purlins. Recommended home insulation r values. Concrete homes magazine web search 5 18 2010 r value for concrete glass other materials wikipedia web search 5 18 2010 citing ristinen robert a and jack j. Tuff r and super tuff r dow building solutions have an r value of r 6 5 per inch.

Two layers of insulation are installed and held up with metal bands to achieve a high r value. 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. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.