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heat gain
Posted by tomh on July 6th, 2004 10:39 AM
In reply to Wall insulation by Kevin Gray on July 6th, 2004 08:35 AM [Go to top of thread]
Most summer heat gain is through the roof. Be sure you have at least an R-30 in the attic first. Cellulose insulation can be blown in through the walls by drilling holes top and bottom and using a rented insulation blower. Fill from the bottom first, then top off from the top.
The holes can be placed interior or exterior. Exterior plugs are sold for various siding, but will always show, interior drywall repairs are pretty easy to cover the 1 to 1-1/2 inch holes, and is the method I have preferred. It will be hard not to have some voids if there is already some insulation in the walls, but if there is an adequate uninsulated space, the cellulose seems to fill well.
We just added a SEER 15 AC unit, which was expensive, but it dropped my power bills by at least 1/3, and possibly 1/2. I also have spent some time doing duct sealing using mastic and insulation. Many homes have disconnected or leaking ductwork that pours conditioned air to the outside. Be sure to do a through inspection of your duct system, and if it runs through the attic, add insulation to the ducts. This can produce the biggest savings of all if there are leaks. Was this post helpful? Yes: or No:
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