Attic Insulation Cellulose Thickness
Cellulose provides an r value of approximately 3 5 per inch.
Attic insulation cellulose thickness. In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended. It is pulverized into a fine powder that adheres and remains a part of the insulation. The cellulose insulation method creates lots of dust but it gets the job done. You d need a thickness of.
R value is a measure of insulation s ability to resist heat traveling through it. The two main least expensive and most commonly used residential insulation materials is cellulose and fibreglass. The cellulose product home comfort insulation uses is treated with 100 borate fire retardant formula. Loose fill cellulose insulation can settle around and conform to most of the obstructions found in walls and attics.
If your current insulation is only five inches deep you will need to add seven inches of insulation to achieve the 12 inch r 38 rating. Cellulose will settle after installation creating a dense continuous layer helping to block air transfer through any holes into your attic. 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. For loose fill cellulose this translates to a total depth ranging from 8 inches.
The table below shows what levels of insulation are cost effective for different climates and locations in the home. R 38 is the industry standard and the minimum thickness for r 38 is 12 inches. The higher the r value the better the thermal performance of the insulation. Insulation level are specified by r value.
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. So what are the advantages and disadvantages of each of these. Inspecting your attic insulation. Measure the depth of your current insulation.
Measure the area needing insulation. If you hire a pro they use wet spray cellulose which adds a small amount of water to help control the dust and to slightly increase the insulation value per inch. They come with or without a paper or foil facing that acts as a vapor barrier. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.