Attic Insulation Not Deep Enough

When you re blowing insulation it can get dusty and hard to see whether you ve got it deep enough around the entire attic.

Attic insulation not deep enough.

Pick up the blower and insulation cellulose blown in ceiling insulation is a good choice for diyers. Department of energy it s recommended that attics have an r 38 to r 49 or about 12 to 15 of fiberglass or cellulose 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.

If you can t see the joists because the insulation is above them then you should measure the insulation depth with a ruler to see if you have enough. 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. Once you know total depth you can estimate the r value if the insulation. 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. For instance in some places like las vegas the sun tends to set on the roof causing the attic to be warm. 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. For fiberglass and cellulose insulation you can estimate about r 3 per inch.

This allows a lot of heat up to the attic. 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. Hot air fills the attic and raises the temperature. 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.

According to the u s. 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. Many homes are leaky and have insufficient insulation in the attic. 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.

Generally heat rises and cool air falls.