Roof R Value Calculator

Includes multi unit residential buildings.

Roof r value calculator.

To calculate the total r value of a roof assembly find the total thickness in inches of each type of insulating material within the system. The r value calculator is best used as follows. This calculator is to be used as an estimating tool only. Ceiling insulation r value r value for walls and more.

Some of the possible material combinations may not be suitable for actual constructions i e. For each different material multiply the thickness by the standard r value per inch for that material. Remember the horizontal or vertical orientation of the material is important to get its insulation value correct. Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications.

This webpage calculates the r value of walls roofs and suspended floors for most insulation material r values. Work out all the different materials and surfaces that make up the wall ceiling or surface you want to work out the r values and u values for. Eps based claddings directly fixed on timber framing. Class 2 high rise apartment a building containing 2 or more sole occupancy units each being a separate dwelling.

Input depth of existing blown in insulation in inches. R value is a measurement that rates how resistant a product is to heat flow measuring the ability of heat to transfer from one side of an object to another.