Question by Christopher W: Home insulation question — insulate walls, or replace single pane sliding glass doors w/ dual pane?
Can’t afford to do both. Which might be more effective (most interested in the reasoning). The single pane doors are big, obvious energy leaks. Yet none of the thinnish (six inches?) walls on the 1-story 1500 sq. foot house are insulated. The insulation would cover a lot more sq. feet than the doors , so that seems to make it a contender. We’re in a climate regularly 50-65 degrees on average, but colder in winters.
Answer by Bambi Berkowicz
Take care of the door first. You don’t lose that much heat through your walls, but you DO through windows – even those really good ones. The other thing is that if your door is drafty, you tend to bump the thermostat up a little.
Just to be sure, you do have attic insulation, right? If not, make that your first objective, the door next, and the walls last.
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