Roof System R Values

R value is used as a measurement of the effectiveness of thermal insulating materials.

Roof system r values. 0 24 per inch of thickness epdm. The higher the r value the better a material performs as a thermal insulator. 0 24 per inch of thickness. Here are the r values of the most popular commercial roofing systems.

To convert rsi to r value multiply the rsi by 5 67826. 5 0 per inch eps insulation. The way it works is simple. 0 34 per inch of thickness bur smooth.

To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. R value because many states or regions require that a roof system have a minimum amount of thermal resistance on commercial industrial and or institutional buildings. The higher the r value the more the material insulates. R value table for roofing materials and building insulation.

Rsi r value système international is the metric equivalent. 6 6 per inch of thickness metal. 3 85 per inch polyiso. Some of the possible material combinations may not be suitable for actual constructions i e.

0 00 per inch of thickness tpo. Types of roof insulation. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1 93721. 0 33 per inch of thickness bur gravel.

This webpage calculates the r value of walls roofs and suspended floors for most insulation material r values. Eps based claddings directly fixed on timber framing.