Insulating Attic Over Existing Insulation

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.

Insulating attic over existing insulation.

Measure how much insulation you already have. Position the new vent chute so the. A quick rule of thumb is that you should have a vapor barrier on the warm side of the insulation. Pull back the existing insulation and use expanding spray foam the fire blocking type to seal any.

Blown in insulation in the attic seal attic bypasses. Blown in insulation fills between existing wall studs and ceiling joists quickly and easily. In this case the area behind the knee wall will be uncomfortably hot or cold. Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.

If only the living space will be insulated wrap the insulation around the room s walls and ceiling and then continue along the floor of the non living space. Check the attic walls and floors adjacent to an unheated space like a garage or basement. Install or repair vent chutes. How do i add insulation to existing attic 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. The vapor retarder on top of or between layers of insulation can trap moisture. An un insulated attic should have some airflow to prevent humidity from building up in the winter which could condense and form ice. Install fiberglass batts over existing batt insulation.

Faced insulation should not be placed on top of existing insulation in the attic. Insulating a finished attic there are two basic ways to insulate a finished attic. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. Put on goggles and gloves to protect yourself while handling.

Any new batt or roll insulation installed over existing insulation in the attic needs to be without a vapor retarder face. Pull the existing insulation away from the roof. Another benefit of the ventilation is that it will keep your attic cooler in the summer as well as your house. Check the depth using a tape measure.

During new construction batt insulation thick strips of spun fiberglass or a paper based product is cut.