Roof Insulation R Value Calculator

R value insulation chart find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1 93721. This calculator is to be used as an estimating tool only.

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To convert rsi to r value multiply the rsi by 5 67826.

Roof insulation 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. 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. Ceiling insulation r value r value for walls and more. Input depth of existing blown in insulation in inches.

R value is a measure of insulation s ability to resist heat traveling through it. The r value calculator is best used as follows. Recommended home insulation r values. R value of various materials.

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. Our insulation calculator enables simple calculation of total wall roof ceiling or floor system insulation r values. 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. Click the button to calculate the approximate r value for this job.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Remember the horizontal or vertical orientation of the material is important to get its insulation value correct. To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. You should of course see the manufacturer provided technical data sheet for the r value of specific products.

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. The table below shows what levels of insulation are cost effective for different climates and. The higher the r value the better the thermal performance of the insulation. Built by esd consultants low impact development lid consulting in melbourne australia the r value calculator is a practical tool to simplify total insulation calculations.

For a very good introductory overview article on r value see r values over at the website of. Insulation level are specified by r value.

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