Standard Depth Of Blown In Fiberglass Insulation Attic

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.

Standard depth of blown in fiberglass insulation attic.

Fibreglass insulation material has no nutritional value for insects and less likely to get attacked by them. Insulation level are specified by r value. For loose fill cellulose this translates to a total depth ranging from 8 inches. Making sure the correct amount of insulation is installed requires a bag count or a comparison with the recommendations on an attic card.

In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended. You d need a thickness of. Blown in insulation thickness can vary in an attic space. R value is a measure of insulation s ability to resist heat traveling through it.

You can usually obtain an r factor of 3 1 to 4 2 or slightly higher per inch of material with batts. Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter. And you want to have probably a good 12 to 15 inches in the attic when you re done of built up insulation. 3200 ft2 1000 3 2.

The r factor of blown in fiberglass is usually 2 3 to 2 8 per inch of material. The higher the r value the better the thermal performance of the insulation. The table below shows what levels of insulation are cost effective for different climates and locations in the home. When blown into attics and wall spaces loose fill fiberglass offers an average r 2 5 thermal value per inch the higher the number the greater the insulating effect.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Each bag of fiberglass insulation will cover approximately 65 square feet of attic space to a depth of 10 inches cellulose insulation covers half as much. Cellulose attic insulation read more. 19 2 bags per 1000 ft2for r 38 x 3 2 61 4 bags.

Building inspectors typically check the insulation depth to verify compliance with local codes. Once installed and expanded to the uniform manufactured thickness batts offer a known r factor. 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.