New Insulation In Attic

In most cases homeowners will add new insulation over old insulation.

New insulation in attic.

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. R value is a measure of insulation s ability to resist heat flow. Pull the existing insulation away from the roof. Insulation levels are specified by r value.

Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. You should consider attic or roof radiant barriers in hot climates reflective insulation and foundation insulation for new home construction. Position the new vent chute so the. The higher the r value the better the thermal performance of the insulation.

The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. Typically this is done either by placing batt or roll insulation in between the ceiling joists or by using a blower to blow loose fill insulation in between the joists. Blown in insulation in the attic seal attic bypasses. Attic insulation considerations batt blanket or rolled insulation batt insulation consists of long rolls of insulation fibers which are held together with a paper or reflective foil backing.

Once the old insulation has been removed and the attic is cleaned the installation of the new insulation can begin. Batt loose fill or roll insulation can be installed on top of existing insulation. If your insulation doesn t measure up and you need more installation can be done as a weekend diy project or you can call a professional installer to handle the job. The vapor retarder on top of or between layers of insulation can trap moisture.

The insulation fibers may be comprised of fiberglass cellulose mineral wool or even recycled blue jeans. Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and. Adding new insulation over old insulation. Any new batt or roll insulation installed over existing insulation in the attic needs to be without a vapor retarder face.

This is because there are no chemical interactions that are caused by mixing these kinds of insulation meaning there are no health concerns to worry about. Consider products that provide both insulation and structural support such as structural insulated panels sips and masonry products like insulating concrete forms.