insulation upgrade


Old 05-22-01, 11:46 AM
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We are currently building a 2,500 sqft home. Two stories, with 1,760 feet on the first floor the remainder on the second floor. We live on the Illinois / Wisconsin border. The heating source is gas/forced air. Our builder would like to take our exterior walls from around an R19 insulation factor to around a R25 factor. The cost of this upgrade is around $1,500. Is this money well spent? How long will it take for this upgrade to payback in energy cost? Overall is this a good investment?
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Old 05-22-01, 04:49 PM
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My first approach would be to make sure that I had a minimum of R-38 in all attic areas where most heat loss occurs...

Then lets assume that for the 1500 dollars difference you want to break even on your investment. If you saved $50 per month on energy use that would be $600 per year so it would take approximately 22 years to recoup your investment... I don't think you would notice a comfort difference between the two products.. also curious as to what product gives you an R-25, I am assuming in a 2" x 6" stud cavity.

Windows are a large factor in heat loss from the wall areas of a structure... I reccommend foam sealing all openings and behind electrical outlets on exterior walls, This drastically reduces air infiltration.

Good Luck


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