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Old 04-19-2012, 11:07 PM   #1
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Cantilever floor


Anybody have any links to specs and/or diagrams on how to properly insulate an exposed floor with plumbing? We are doing an addition that will sit on columns/footings so the bottom side of the bathroom floor will be 'exposed'. Under the addition is landscaping and egress windows in the basement.

We are in central wi so the winters get pretty cold and I am concerned about the water lines and drains freezing.

I had intended in fiberglass insulating the floor cavities and putting 2-3" of foam board across the bottom... Any suggestions?

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Old 04-19-2012, 11:08 PM   #2
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Cantilever floor


Quote:
Originally Posted by Justgaff
Anybody have any links to specs and/or diagrams on how to properly insulate an exposed floor with plumbing? We are doing an addition that will sit on columns/footings so the bottom side of the bathroom floor will be 'exposed'. Under the addition is landscaping and egress windows in the basement.

We are in central wi so the winters get pretty cold and I am concerned about the water lines and drains freezing.

I had intended in fiberglass insulating the floor cavities and putting 2-3" of foam board across the bottom... Any suggestions?

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Sorry-it's not technically cantilevered-I forgot to change the subject line...

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Old 04-19-2012, 11:17 PM   #3
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Cantilever floor


More depth for insulation and a thicker foam.

Make sure that you consider perm ratings and air barrier detailing.
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Old 04-20-2012, 04:08 PM   #4
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Cantilever floor


http://www.buildingscience.com/docum...n-crawlspaces/
No vinyl above. Cover with plywood, trim. Just verifying.

Gary
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Old 04-22-2012, 07:27 PM   #5
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Cantilever floor


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Originally Posted by GBR in WA
http://www.buildingscience.com/docum...n-crawlspaces/
No vinyl above. Cover with plywood, trim. Just verifying.

Gary
Awesome article! Thank you!!
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