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Justgaff 04-19-2012 11:07 PM

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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Justgaff 04-19-2012 11:08 PM

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?

Sent from my iPad using DIY Forum

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

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Windows on Wash 04-19-2012 11:17 PM

More depth for insulation and a thicker foam.

Make sure that you consider perm ratings and air barrier detailing.

Gary in WA 04-20-2012 04:08 PM

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

Gary

Justgaff 04-22-2012 07:27 PM

Quote:

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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