Roof Insulation R Value Calculator

Ceiling insulation r value r value for walls and more.

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. This calculator is to be used as an estimating tool only. Our insulation calculator enables simple calculation of total wall roof ceiling or floor system insulation r values. Insulation level are specified by r value.

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. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. R value of various 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.

Click the button to calculate the approximate r value for this job. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1 93721. Remember the horizontal or vertical orientation of the material is important to get its insulation value correct. 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.

To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. For a very good introductory overview article on r value see r values over at the website of. The table below shows what levels of insulation are cost effective for different climates and. Input depth of existing blown in insulation in inches.

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. Recommended home insulation r values. Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications. The r value calculator is best used as follows.

The higher the r value the better the thermal performance of the insulation. R value is a measure of insulation s ability to resist heat traveling through it.