This old house general contractor tom silva and host kevin o connor demonstrate the proper way to insulate an attic.
How to insulate attic space.
For the center areas hold the hose level and blow in insulation evenly until you ve reached your level lines photo 6.
In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below.
See below for a shopping list and tools.
Pay attention to areas where plumbing ductwork or wiring enter the space.
Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and.
To cut blanket style insulation place the product over a piece of plywood with its paper or foil side down.
Blow in insulation until the hopper is empty.
1a attic access door 2.
How to insulate an unfinished attic preparing an attic for insulation.
See do it yourself spray foam insulation and how to caulk.
Attic insulation is installed in the floor of the attic so you ll need to do a few things to make the process straightforward.
Check your local building code for r value insulation level recommendations and any vapor barrier requirements that apply to your area.
To install insulation.
Then pivot in place and do the same thing to the other side.
Installing a vapor barrier.
Batts and blankets insulation often comes with a vapor retardant facing and some varieties.
Move across the attic until you ve hit your desired height at every point.
If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space.
The average home needs up to 19 inches of fiberglass insulation in the attic for maximum energy efficiency.
Place planks 1 by 6 or 1 by 8 or plywood sheaths across floor joists to improve.
Start by installing temporary lighting such as clip lights and laying a few sturdy boards along the joists to create a walkway.
Seal gaps that allow unconditioned air into the space you re insulating.