Roof Insulation R Value Calculator

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.

Roof insulation r value calculator.

To convert rsi to r value multiply the rsi by 5 67826. Building insulation of course is what we are normally referring to when we say thermal insulating materials but in a commercial roof system the r values of other components such as cover boards and certain adhesives can often be included when calculating the total r value of the system. Ceiling insulation r value r value for walls and more. Input depth of existing blown in insulation in inches.

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. The r value calculator is best used as follows. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Click the button to calculate the approximate r value for this job.

Our insulation pack calculator will help you work out the area to be insulated and provide a recommendation on the number of packs required for your project. 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. To calculate the total r value of a roof assembly. 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.

Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. 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.

R value of insulation is the most important guiding factor on the ability of the insulation to reduce heat flow up or down. Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications.