Calculating Attic Insulation R Value

An r value is a measure of a given material s.

Calculating attic insulation r value.

This calculator is to be used as an estimating tool only. 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. Ceiling insulation r value r value for walls and more. To determine the r value of the insulation in your attic you need to know the r value of the type of insulation in your home and the thickness of the insulation.

Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. R value measures how well certain building insulation materials can resist heat. When determining how much insulation you need don t guesstimate calculate. Applied depth of insulation the height of placing the 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. As a benchmark one inch of solid wood has an r value of 1. Know exactly how much you need with our project calculators. The higher the r value the better the thermal performance of the insulation.

Input length width and desired r value of the area to be insulated. The cost of one bag. Recommended home insulation r values. The table below shows what levels of insulation are cost effective for different climates and.

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 square footage of the area. R value is a measure of insulation s ability to resist heat traveling through it. This calculator is to be used as an estimating tool only.

How to calculate existing r value in an attic. Insulation level are specified by r value. 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. R value of insulation by type.

Here are the r values per inch of the most common types of insulation. The higher the r value the greater the insulation performance. 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. Input depth of existing blown in insulation in inches.

Inspecting your attic insulation. Our calculator helps you measure what r value for exterior walls you may be looking for as well as for different applications.