Roof R Value Calculator

For each different material multiply the thickness by the standard r value per inch for that material. Add the results for all the materials together to get the total r value for the roof assembly. This webpage calculates the r value of walls roofs and suspended floors for most insulation material r values.

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Class 2 high rise apartment a building containing 2 or more sole occupancy units each being a separate dwelling.

Roof r value calculator.

It uses the iso thermal planes method the same method as used in nzs4214 2006. 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. Eps based claddings directly fixed on timber framing. This calculator is to be used as an estimating tool only.

Some of the possible material combinations may not be suitable for actual constructions i e. 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. Ceiling insulation r value r value for walls and more. Input depth of existing blown in insulation in inches.

Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications. 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. Click the button to calculate the approximate r value for this job. The r value calculator is best used as follows.

Includes multi unit residential buildings. Remember the horizontal or vertical orientation of the material is important to get its insulation value correct.

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