Determine Need For Attic Insulation

Department of energy it s recommended that attics have an r 38 to r 49 or about 12 to 15 of fiberglass or cellulose insulation.

Determine need for attic insulation.

Click the button to calculate the amount of insulation in square feet and man hours wall and ceiling fiberglass insulation needed for this job. Inspecting your attic insulation will help you determine your insulation needs. There are four especially common signs of problems with attic insulation. Insulation levels are specified by r value.

If you notice one or more of these occurring you probably need to take action. Use unfaced insulation when adding more insulation to an attic that already has some insulation laying the rolls or batts at right angles to the floor joists. In particularly cold climates you might go up to r 60. 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.

Let s say the insulation you ve selected has an r value of three per inch and. A quick way to see if you need more insulation is to look across your attic floor. Choose your insulation type and material 1. The higher the r value the better the thermal performance of the insulation.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Input length and width of area to be insulated. Loose fill insulation fibers are packaged in bags and blown in place to the desired depth and density using special. To view the next video in this series click here.

This calculator is to be used as an estimating tool only. R value is a measure of insulation s ability to resist heat flow. Common signs of problems with insulation. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.

In general an attic s r value should be between r 30 and r 49. According to the u s. The correct amount can help maintain a comfortable temperature and save money. If you can t see the joists because the insulation is above them then you should measure the insulation depth with a ruler to see if you have enough.