Roof Insulation R Value Calculator

Ceiling insulation r value r value for walls and more.

Roof insulation r value calculator.

To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. 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. R value is a measure of insulation s ability to resist heat traveling through it. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.

For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1 93721. You should of course see the manufacturer provided technical data sheet for the r value of specific products. The higher the r value the better the thermal performance of the insulation. Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications.

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. Insulation level are specified by r value. 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.

Our insulation calculator enables simple calculation of total wall roof ceiling or floor system insulation r values. Remember the horizontal or vertical orientation of the material is important to get its insulation value correct. The r value calculator is best used as follows. This calculator is to be used as an estimating tool only.

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. Input depth of existing blown in insulation in inches. To convert rsi to r value multiply the rsi by 5 67826. The table below shows what levels of insulation are cost effective for different climates and.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Click the button to calculate the approximate r value for this job.