Calculating Attic Insulation R Value

R value measures how well certain building insulation materials can resist heat.

Calculating attic insulation r value.

R values help homeowners decide which type of insulation material to use and in what thickness. The higher the r value the greater the insulation performance. Input length width and desired r value of the area to be insulated. The cost of one bag.

Recommended home insulation r values. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. The square footage of the area. Here are the r values per inch of the most common types of insulation.

The length of the area feet inches the width of the area feet inches the coverage of one bag cubic feet the r value per one inch of thickness of the insulation settled the desired r value. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. As a benchmark one inch of solid wood has an r value of 1. Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications.

Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. R value is a measure of insulation s ability to resist heat traveling through it. When determining how much insulation you need don t guesstimate calculate. Click the button to calculate the depth in inches and pounds of total insulation required for this job.

Insulation level are specified by r value. The table below shows what levels of insulation are cost effective for different climates and. Applied depth of insulation the height of placing the insulation. How to calculate existing r value in an attic.

Know exactly how much you need with our project calculators. Inspecting your attic insulation. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. 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.

This calculator is to be used as an estimating tool only. 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. An r value is a measure of a given material s.

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