Roof Panel R Value

Expanded polystyrene eps is type i per astm c578 11.

Roof panel r value.

R value table for roofing materials and building insulation. Extruded polystyrene xps is type iv type x per astm c578 11. R value is used as a measurement of the effectiveness of thermal insulating materials. The r value of each osb facing is r 0 55.

R value measures how well certain building insulation materials can resist heat. The higher the r value the greater the insulation performance. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1. When determining how much insulation you need don t guesstimate calculate.

Rsi r value système international is the metric equivalent. Types of roof insulation. The higher the r value the better a material performs as a thermal insulator. To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826.

R value is used in the united states.