Roof Insulation R Value Calculator

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.

Roof insulation r value calculator.

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. Our insulation calculator enables simple calculation of total wall roof ceiling or floor system insulation r values. 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.

R value of various materials. To convert rsi to r value multiply the rsi by 5 67826. 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.

Recommended home insulation r values. 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 a very good introductory overview article on r value see r values over at the website of. The r value calculator is best used as follows.

Click the button to calculate the approximate r value for this job. Ceiling insulation r value r value for walls and more. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1 93721. 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.

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. You should of course see the manufacturer provided technical data sheet for the r value of specific products. This calculator is to be used as an estimating tool only. Insulation level are specified by r value.

Input depth of existing blown in insulation in inches. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.