Determine Need For Attic Insulation

The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.

Determine need for attic insulation.

Let s say the insulation you ve selected has an r value of three per inch and. If your insulation level is at or below the top of the floor joists you probably need to add more insulation but remember to seal the air leaks before you insulate. The correct amount can help maintain a comfortable temperature and save money. In particularly cold climates you might go up to r 60.

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. Choose your insulation type and material 1. 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. This calculator is to be used as an estimating tool only.

R value is a measure of insulation s ability to resist heat flow. However there are a few easy things you can do to see if your attic is properly insulated. The higher the r value the better the thermal performance of the insulation. According to the u s.

To view the next video in this series click here. Input length and width of area to be insulated. If you notice one or more of these occurring you probably need to take action. Insulation levels are specified by r value.

If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs. In general an attic s r value should be between r 30 and r 49. Loose fill insulation fibers are packaged in bags and blown in place to the desired depth and density using special. Click the button to calculate the amount of insulation in square feet and man hours wall and ceiling fiberglass insulation needed for this job.

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. Inspecting your attic insulation will help you determine your insulation needs. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. There are four especially common signs of problems with attic insulation.