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Old 03-11-2012, 07:48 AM  
keitht
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Default flooring help - moisture proof or jack up floor?

I need to install new flooring. I have an uninsulated craw / walk space.

To install wood flooring I am told that I would need to moisture proof. For assorted reason, I cannot lay moisture barrier on the ground. Could it be attached to the underside of the floor? How and what would I attach?

The other option is to install tile. To do this I will need to increase my floor strength with joist supports.

I'm not sure which is the best option.

I guess I could allways go with vinyl tiles. But I'm not convinced that vinyl tiles in the living room would look acceptable?

I do not want carpet.

Every option seems to have multiple complications and my brain is getting frizzled trying to decide which way to go.

Any expert advice would be greatly appreciated.


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Old 03-11-2012, 11:08 AM  
joecaption
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Since no one here knows why you can not install a vaper barrer on at least the crawl space area, no mention of floor joist spans or widths.
We also need to know what you have now for a subfloor and underlayment if there is any. Need thickness and what material it is.


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Old 03-11-2012, 06:52 PM  
keitht
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Joe:

I do not know what the joist's are made of. The house is 40-50 years old.
The joists are 7 1/2 inches by 1 1/2 inch.
The joist spacing is on 16 inch centers.
I think.... that the span is about 11 to 11 1/2 feet.
It looks as if my subfloor is one sheet of 3/4 plywood.

I am going to look it over soon and see how much of a pain it would be to shorten up the joist spans. I plan to add subfloor.

The reason that I cannot put moisture barriers in is because this house is built up over a crawl space / walk in area that is subject to occasional flooding. The house is high and dry, but it occasionally gets inundated below.

I'm guessing that wood flooring would be a crapshoot (although the neighbor has had wood flooring in his house forever with no issues) But it's too pricy to gamble with.
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Old 03-12-2012, 08:49 AM  
isola96
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I don't think there should be any need for more support with you joist spans 3/4" will be strong enough if in good condition to do hard wood right over.
If you do tile you will want to add a 1/2 ontop of the 3/4" ply or backer board.

I think your basement hight is good enough for any floor really but that's my thoughts.
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