Attic Insulation Not Deep Enough

Many homes are leaky and have insufficient insulation in the attic.

Attic insulation not deep enough. Work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just put in. Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and to prevent thermal bridging the heat loss that occurs through the wood framing. Hot air fills the attic and raises the temperature. According to the u s.

When you re blowing insulation it can get dusty and hard to see whether you ve got it deep enough around the entire attic. Pick up the blower and insulation cellulose blown in ceiling insulation is a good choice for diyers. If the rafters are deep enough it may be possible to use rigid foam as the ventilation baffles sealing along the perimeter of each piece to create an air barrier then filling the rest of the cavity with batts or blown insulation see ceiling remodel. Add the right kind of insulation when adding additional insulation you do not have to use the same type of insulation that currently exists in your attic.

Mark the desired level on different roof trusses around the attic before you start photo 4. Inspecting your attic insulation first things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. This allows a lot of heat up to the attic. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type.

For instance in some places like las vegas the sun tends to set on the roof causing the attic to be warm. Fiberglass and cellulose insulation have r values of 2 9 to 3 8 per inch while sprayed foam insulation can go as high as 8 0 per inch. For fiberglass and cellulose insulation you can estimate about r 3 per inch. 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.

But in homes that do not have proper attic insulation or ventilation heat tends to migrate. Once you know total depth you can estimate the r value if the insulation. From flat to cathedral in fhb 192. For houses with 2 6 rafters it s necessary to increase rafter depth to make room for enough insulation to meet code minimums.

Warm spaces have less condensation risk than colder space so when you add insulation to the attic floor you re intentionally blocking some of that heat from keeping the attic warm.