Metal Building Roof Insulation R Value

For over 30 years we have developed and promoted high r value insulation systems in metal buildings.

Metal building roof insulation r value.

Built up roof membrane gravel surfaced membrane and gravel only 0 33. Up to 6 r 19 can be used in a single layer appliction. Uncompressed unfaced insulation rests on top of the membrane between the purlins. Amount of time and research over the past two decades on the insulation methods and performance expectations for metal building roof and wall assemblies.

For a very good introductory overview article on r value see r values over at the website of. Beginning in 2005 the buildings technology center at the oak ridge national laboratory. The thicker the fiberglass insulation blanket the higher the r value. R value per inch ft f hr btu rsi per millimeter k m w r value for typical installed thickness not per inch source.

Although metal carports do not require insulation many people who choose to construct this type of steel building do so because they plan to fill in the gaps with concrete blocks. R value measures how well certain building insulation materials can resist heat. When determining how much insulation you need don t guesstimate calculate. R value of roofing materials and building insulation.

This system enables the performance values to be increased significantly and is considered an innovative new construction of metal buildings for energy savings. In order to select the metal building insulation that will best meet your needs first you need to understand r value. Multiple thicknesses or layers can be combined in a double layer system to achieve high r values. R value is the measurement of insulation effectiveness to prevent heat loss.

For multilayer installations the last rated r value of insulation is for unfaced insulation draped over purlins and then compressed when the metal roof panels are attached ashrae news release january 12. The higher the r value of insulation the more energy saved. When choosing metal building insulation there are several thicknesses or r value s to choose from ranging from 2 5 8 r 8 to 9 5 r 30. Below is a listing of the accepted r values for fiberglass blanket insulation of different thicknesses when properly installed in metal buildings higher numbers indicate greater effectiveness.

Including its r value of 2 2 5 per inch there are various reasons why you may choose to use concrete blocks rather than traditional steel wall panels but the most common reason is increased security. High r value insulation systems. Be aware that improper installation can significantly lower the effectiveness of insulation. You should of course see the manufacturer provided technical data sheet for the r value of specific products.

National roofing contractors association. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. This is dependent on the depth of the purlins girts. R value of various materials.