How To Amp Up Attic Insulation Depth

Handy homeowners can install blown in insulation in the attic.

How to amp up attic insulation depth.

Affix rigid foam insulation to the attic side of the hatch or door. Insulation level are specified by r value. R value is a measure of insulation s ability to resist heat traveling through it. Attic insulation using fiberglass mary has a four bedroom detached house 150m2 in size.

Attic hatch or door. Just lay the new batting right on top of your current between joist batting. Inspecting your attic insulation. Add weatherstripping around the perimeter and a sweep to the door of a walk up attic.

The higher the r value the better the thermal performance of the insulation. 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. Pricing can vary based on thickness and material but it s generally 0 15 to 0 50 cents per square foot. In temperate coastal areas such as zone 3 attic insulation of at least r30 up to a maximum of r60 is recommended.

Pull down stair or ladder. For loose fill cellulose this translates to a total depth ranging from 8 inches. You can expect an r value of 3 1 to 3 8 per inch. Mary previously had 100mm of fibreglass insulation in her attic but decided to upgrade the insulation in her attic to the required 300mm following consultation with the seai and various contractors.

The table below shows what levels of insulation are cost effective for different climates and locations in the home. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. If your attic just needs a top up you can apply a second layer of batting perpendicular to your current one. Blowing insulation into walls is best left to the pros because it involves drilling into stud spaces that may contain electrical.