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Insulating Floors And Moisture

 
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Old 02-16-2014, 08:47 PM   #1
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Insulating Floors And Moisture


Are floors generally insulated between the upstairs( bedroom) and downstairs family room area. If so, are mousture barriers needed?
What about between the basement and the upstairs?
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Old 02-16-2014, 08:57 PM   #2
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Re: Insulating Floors And Moisture


Pretty normal to insulate floors on custom jobs.

No moisture barriers used inside.

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Old 02-16-2014, 10:27 PM   #3
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Re: Insulating Floors And Moisture


What about when installing hard wood to prevent moisture absorbtion?
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Old 02-17-2014, 07:53 AM   #4
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Re: Insulating Floors And Moisture


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What about when installing hard wood to prevent moisture absorbtion?
The insulation between floors isn't there to be insulation, it's intended to provide some sound deadening so you don't hear loud footsteps above you. It's unfaced - there should be no moisture barrier on it.

Controlling moisture from a basement is a completely different topic and it isn't done with the insulation you're referring to.
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Old 02-17-2014, 08:30 AM   #5
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Re: Insulating Floors And Moisture


If a basement runs the full length of a home, a ranch style home for example, you dont need a moisture barrier in the flooring directly above the basement?
Obviously the basement ceiling is about 8 ft high.
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Old 02-17-2014, 08:37 AM   #6
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Re: Insulating Floors And Moisture


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If a basement runs the full length of a home, a ranch style home for example, you dont need a moisture barrier in the flooring directly above the basement?
Obviously the basement ceiling is about 8 ft high.
If it has some heat / cooling, no. If you actually have a basement moisture problem, that's dealt with completely separate from your question. Any barrier would be over the floor / walls, and never the ceiling.
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Old 02-17-2014, 10:33 AM   #7
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Re: Insulating Floors And Moisture


So if the basement is a concrete slab, the barrier woukd go over the concrete slab?
If concrete walls are framed out with 2 x 4, the barrier goes overbthe insukation or directky over the concrete wall?
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Old 02-17-2014, 04:38 PM   #8
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Re: Insulating Floors And Moisture


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So if the basement is a concrete slab, the barrier woukd go over the concrete slab?
If concrete walls are framed out with 2 x 4, the barrier goes overbthe insukation or directky over the concrete wall?
The slab should have been poured over a barrier. The outside walls should have had a barrier coating before back fill. If this is true for your situation, then there would be no further moisture barrier put over the basement floor, but if stud walls are built at the basement walls, you would put vapor barrier on the inside of the insulated stud walls. Whether you need a vapor retarder or a vapor barrier depends on your location and other details, so I can't say what's the best for you.

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