Roof Insulation R Value Calculator

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.

Roof insulation r value calculator.

As a result the higher the r value the better the insulation properties when it comes to roof insulation in fact what this means is by increasing or decreasing the thickness of the insulation one can change the effectiveness. Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications. Input depth of existing blown in insulation in inches. R value of insulation is the most important guiding factor on the ability of the insulation to reduce heat flow up or down.

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. You should of course see the manufacturer provided technical data sheet for the r value of specific products. Whether it s a backyard workshop a man cave a studio or a potting shed you can keep your space comfortable safe with the right insulation vent. This calculator is to be used as an estimating tool only.

Click the button to calculate the approximate r value for this job. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. R value of various materials. Remember the horizontal or vertical orientation of the material is important to get its insulation value correct.