Insulating Attic Over Existing Insulation

Another benefit of the ventilation is that it will keep your attic cooler in the summer as well as your house.

Insulating attic over existing insulation.

Pull back the existing insulation and use expanding spray foam the fire blocking type to seal any. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. Measure how much insulation you already have. In this case the area behind the knee wall will be uncomfortably hot or cold.

Check the attic walls and floors adjacent to an unheated space like a garage or basement. Pull the existing insulation away from the roof. Faced insulation should not be placed on top of existing insulation in the attic. An un insulated attic should have some airflow to prevent humidity from building up in the winter which could condense and form ice.

Check the depth using a tape measure. Blown in insulation in the attic seal attic bypasses. More insulation installation tricks and tips work from the perimeter of the attic toward the door or hatch so that you don t trample all over the insulation you just. Insulating a finished attic there are two basic ways to insulate a finished attic.

To install fiberglass batts over existing insulation lay the batts perpendicular to the joists so they do not compress the insulation below whether you live in a warm weather state as i do or in a cooler northern climate it s hard to stay comfortable and keep your energy bills in check if you don t have adequate insulation in the attic. The structural elements are usually exposed in these areas which makes it easy to see what type of insulation you have and to measure its depth or thickness inches. 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. Install fiberglass batts over existing batt insulation.

During new construction batt insulation thick strips of spun fiberglass or a paper based product is cut. How do i add insulation to existing attic insulation. Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and. Install or repair vent chutes.

Position the new vent chute so the. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. A quick rule of thumb is that you should have a vapor barrier on the warm side of the insulation. The vapor retarder on top of or between layers of insulation can trap moisture.

Put on goggles and gloves to protect yourself while handling.