Highest R Vallue Roof

Tuff r and super tuff r dow building solutions have an r value of r 6 5 per inch.

Highest r vallue roof.

Insulation level are specified by r value. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. 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. The higher the r value the better the thermal performance of the insulation.

R value of various materials. 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. As we said before the r value measures the thermal resistance of a material. Two layers of insulation are installed and held up with metal bands to achieve a high r value.

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. A high r value system is commonly referred to as a double layer system. Steel bands are installed on the underside and perpendicular to the roof purlins. Recommended home insulation r values.

Energy and the environment. R values of uninsulated concrete. Therefore the doe s value is on the high end of the r value of a log wall. These are closed cell polyisocyanurate insulating foam core board products.