If you decided to use a rigid foam board to help insulate your cathedral ceiling you would install the board on top of the roof sheathing and underneath the plywood at the top of the roof.
Best way to insulate attic ceiling.
See below for a shopping list and tools.
It s available in fiberglass mineral wool plastic fibers and natural fibers.
This type of ceiling is insulated in the same manner that you would insulate a standard attic space.
Insulate across the top of flat attic.
Installing a vapor barrier.
This type of insulation.
Batts and blankets insulation often comes with a vapor retardant facing and some varieties.
This installation would proceed as any insulation installation.
This old house general contractor tom silva and host kevin o connor demonstrate the proper way to insulate an attic.
In these designs take out attic floor insulation only below the finished space from knee wall to knee wall and insulate the knee walls themselves.
Place planks 1 by 6 or 1 by 8 or plywood sheaths across floor joists to improve.
Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and.
Blanket insulation is available as batts or rolls and is the easiest diy insulation material.
To install insulation.