Roof R Value Calculator

Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications.

Roof r value calculator.

The r value calculator is best used as follows. Eps based claddings directly fixed on timber framing. It uses the iso thermal planes method the same method as used in nzs4214 2006. This webpage calculates the r value of walls roofs and suspended floors for most insulation material r values.

Add the results for all the materials together to get the total r value for the roof assembly. 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. This calculator is to be used as an estimating tool only.

Ceiling insulation r value r value for walls and more. Click the button to calculate the approximate r value for this job. Some of the possible material combinations may not be suitable for actual constructions i e. 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. Class 2 high rise apartment a building containing 2 or more sole occupancy units each being a separate dwelling.