How Thick Should Insulation Be For Attic Walls

Because high performance batts achieve the same r value as standard insulation and are not as thick they need not be compressed to fit the angles and spaces typically found in cathedral ceilings.

How thick should insulation be for attic walls.

Add insulation to 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. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. The thicker the better.

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. Existing 3 4 inches of insulation. 3 1 2 inches two by four 2x4 stud walls. It is not uncommon to see 15 to 20 of insulation in a well insulated attic.

Measure the length and width of the area you need to insulate. They come with or without a paper or foil facing that acts as a vapor barrier. Inspecting your attic insulation. 3 1 2 inches two by four 2x4 stud walls with true 4 inch depth.

3 1 2 inches two by four 2x4 stud walls. R 38 is the industry standard and the minimum thickness for r 38 is 12 inches. You d need a thickness of. Best insulation for 2x4 and 2x6 wall studs.

Appropriate for this wall type. R 38 high performance batts are 10 to 10 1 4 thick as opposed to standard r 38 fiberglass insulation batts of 12. 6 1 4 inches two by six 2x6 stud walls. This flexible insulation material is most often packaged in rolls that come in various thicknesses and standard widths usually 16 inches and 24 inches to fit between joists or studs in a house s framing.

Measure the area needing insulation. 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. The insulation in your attic should be at least 12 thick. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.