How To Install Insulation In Attic Ceiling

For all eaves with vents fasten bottom of baffle in place to allow insulation to completely cover the top plate.

How to install insulation in attic ceiling.

Measure and mark the height on the baffle. While wearing dust mask and gloves carry r 38 batts of unfaced fiberglass insulation into the attic. Choose your insulation type. Set up a stepladder tall enough to work comfortably from.

Begin laying in the insulation starting at an area farthest from the attic access image 1. Cut side fin and fold baffle at the measured mark to allow for correct insulation height. See below for a shopping list and tools. Using a straightedge as a guide make your cut image 2.

When rolling the insulation cut it to length using a utility knife. If you re installing additional insulation in an attic that s already insulated use unfaced insulation that doesn t have a vapor barrier. This old house general contractor tom silva and host kevin o connor demonstrate the proper way to insulate an attic. Purchase rolls or packages of insulation that will fit in the spaces between the ceiling joists.

Check pipes and vents. 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. The standard width for joists is 24 inches. Before installing determine the insulation material best suited for your home.

You can find out more in our articles on how to apply a vapor barrier to attic insulation and which way to face insulation. Verify the height allows for 1 inch of required air space.