How To Install Insulation In Attic Ceiling

When rolling the insulation cut it to length using a utility knife.

How to install insulation in attic ceiling.

Set up a stepladder tall enough to work comfortably from. 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. See below for a shopping list and tools. Purchase rolls or packages of insulation that will fit in the spaces between the ceiling joists.

Lay the batts across the ceiling joists covering the existing insulation. If you re installing additional insulation in an attic that s already insulated use unfaced insulation that doesn t have a vapor barrier. 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. Before installing determine the insulation material best suited for your home.

Measure and mark the height on the baffle. Begin laying in the insulation starting at an area farthest from the attic access image 1. The standard width for joists is 24 inches. Cut side fin and fold baffle at the measured mark to allow for correct insulation height.

While wearing dust mask and gloves carry r 38 batts of unfaced fiberglass insulation into the attic. This old house general contractor tom silva and host kevin o connor demonstrate the proper way to insulate an attic. Using a straightedge as a guide make your cut image 2. Calculate how much you need.

Check pipes and vents. Verify the height allows for 1 inch of required air space.