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Old 09-04-2007, 09:03 AM   #1
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Putting R25 Footer Sill


would like to insulate the sill above my footer and would like to use R 25, would I save on my Energy Bill and keep the house warmer in the Winter and cooler in the Summer?

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Old 09-04-2007, 11:01 AM   #2
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Putting R25 Footer Sill


The insulation will help more with the cold then the heat, but it will help. You probably won't see a large difference in the energy bill, but there will be less drafts as a result.
Ron

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Old 09-09-2007, 08:04 PM   #3
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Putting R25 Footer Sill


I assume when you say R25 you are referring to fiberglass batts. The sill/foundation area typically allows alot of air flow. In this situation I would consider an application of spray foam. Expanding foam does alot better job sealing cracks and crevices than fiberglass does. Keep in mind that a well sealed basement or crawlspace may allow previously unnoticed mosture problems to come to light and some type of controlled ventilation may become necessary which is not a bad thing.
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Old 09-09-2007, 09:58 PM   #4
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Putting R25 Footer Sill


Scrapiron, I think he means against the rim joist, but sealing the space between the sill plate and the concrete foundation with foam is the way to go.
Ron
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