Roof Insulation R Value Calculator

R value of insulation is the most important guiding factor on the ability of the insulation to reduce heat flow up or down. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. 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.

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Click the button to calculate the approximate r value for this job.

Roof insulation r value calculator.

You should of course see the manufacturer provided technical data sheet for the r value of specific products. Input depth of existing blown in insulation in inches. The r value calculator is best used as follows. This calculator is to be used as an estimating tool only.

Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications. 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. For a very good introductory overview article on r value see r values over at the website of. 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.

R value of various materials. Remember the horizontal or vertical orientation of the material is important to get its insulation value correct. 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.

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