Calculated r values for generic structural insulated panel sip including 7 16 oriented strand board osb on each side.
Roof panel r value.
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.
The higher the r value the greater the insulation performance.
Extruded polystyrene xps is type iv type x per astm c578 11.
R value is used in the united states.
Know exactly how much you need with our project calculators.
The higher the r value the better a material performs as a thermal insulator.
Expanded polystyrene eps is type i per astm c578 11.
Types of roof insulation.
The r value of each osb facing is r 0 55.
R value is used as a measurement of the effectiveness of thermal insulating materials.
To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826.
R value table for roofing materials and building insulation.