Determine Need For Attic Insulation

Insulation levels are specified by r value.

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. In particularly cold climates you might go up to r 60. R value is a measure of insulation s ability to resist heat flow. 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.

Common signs of problems with 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. There are four especially common signs of problems with attic insulation. To view the next video in this series click here.

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

This calculator is to be used as an estimating tool only. 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. 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. According to the u s.

In general an attic s r value should be between r 30 and r 49. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. If you notice one or more of these occurring you probably need to take action. 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.

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. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. The correct amount can help maintain a comfortable temperature and save money.