How To Install Insulation In Attic

If installing shredded insulation fill the attic space at least 15 inches high with insulation.

How to install insulation in attic. Attic insulation and ceiling insulation are discussed in this guide. Batt and roll insulation also called blanket insulation are designed to fit between joists and wall stud cavities. Determine the type of insulation needed for your attic. Loose fill blown in insulation is best for tight spaces or if your attic already has a layer of insulation.

At the perimeter of the attic lay the insulation up to the roof rafters but keep it away from plywood roof sheathing. Installing attic insulation requires first preparing the surfaces around the attic entry to ensure that any contaminants in the attic aren t spread throughout the home. Lay the batts across the ceiling joists covering the existing insulation. If using insulation with a vapor retardant facing install the material with the vapor retardant side down.

Begin laying in the insulation starting at an area farthest from the attic access image 1. Continue laying down the insulation making sure the batts are pressed tightly together at all edge and end joints. Whether using loose fill or batts put the vapor barrier closest to the warm side of your installation where hot moist air would get in facing the house s interior in cold climates beneath floor insulation and the attic s interior in hot climates on top of floor insulation. It covers details for installation of fiberglass and mineral wool batt insulation.

Next any stored belongings or debris in the attic are removed and stored in a safe location that is out of the way. This section provides a guide on how to install insulation it covers specific information on attic insulation and ceiling insulation that will assist with proper installation to meet. When you reach the end of a line pull the insulation back slightly then place it on a joist so there is a solid surface to cut on. To install insulation batts and blankets.

Begin at a wall and work toward the center of the attic floor or the entryway carefully placing insulation between joists and ensuring a snug fit. Old insulation is removed and the attic space is cleaned out. There are many different ways to install insulation. If you re installing additional insulation in an attic that s already insulated use unfaced insulation that doesn t have a vapor barrier.

Batt and roll insulation and loose fill sometimes known as blown in insulation. When rolling the insulation cut it to length using a utility knife. So if you re installing insulation in an attic that doesn t have any used faced insulation and put the paper side down toward the ceiling. See install batt and roll insulation for details.

There are two main types of insulation. The pros often use spray foam insulation or blow shredded insulation.