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Insulation in flooring between basement and upstairs

Insulation in flooring between basement and upstairs


Old 02-26-02, 09:29 PM
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Insulation in flooring between basement and upstairs

We just moved into our newly built house with a finished daylight basement. We had asked our builder to have the basement ceiling insulated but "he forgot" and the drywall was up before we caught it. Because we were already behind schedule we opted to NOT have them tear out the drywall and insulate.
NOW the basement is 4-5 degrees colder than upstairs PLUS voices can be heard between the 2 floors. Did we make the wrong decision? Would the insulation have prevented these problems? Is there an economical remedy?

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Old 02-27-02, 01:09 AM
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It is cooler in the lower level because heat rises and insulation between floors alone would not have solved the temperature difference.
Proper insulation between floor joists, resiliant channel and 5/8" drywall on the ceiling would certainly have reduced sound transmission through the floor, yet air borne sound would still be heard without isolating the basement from the upstairs via sound proofing a door at the stair well. Sound will also be transmitted via the heat ducts.
A lost day or two on your schedule would have proven a lesser trade off for your present situation. You could have insulation blown in between the joists, then patch the holes. A resiliant channel could be applied on existing ceiling and re-drywall. This will require adjustment of ceiling light fixtures and heat ducts as well as lost head room. Bonne chance
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