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Old 03-20-2018, 10:58 AM   #1
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Replacing water damaged subfloor in bathrooms.


I am renovating both my bathrooms due to water leaks. I have ripped everything up and all that's left are the joists. My house is approximately 2 feet off the ground and I live in South Louisiana, so stays pretty damp under my hous: humid climate. My question is, because there is the possibility of moisture below my house, and possible moisture because it's in the bahtroom, should I use 3/4" PT plywood as my subfloor?
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Old 03-20-2018, 01:36 PM   #2
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Re: Replacing water damaged subfloor in bathrooms.


what shape are your joists in? moisture readings?
I would think you would consider using
PT subfloor for termites & moisture...
any real options for reducing moisture under house?

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Old 03-22-2018, 06:57 AM   #3
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Re: Replacing water damaged subfloor in bathrooms.


Joists are in god condition. Hard to control moisture here in South Lousiana lol Under my house doesn't hold puddles of water, just stay damp due to the weather in general.
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Old 03-22-2018, 07:51 AM   #4
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Re: Replacing water damaged subfloor in bathrooms.


I used pressure treated in mine. Iím in south Louisiana too and your right. The moisture is terrible. I had replaced a lot of subfloor previously when I had a roof leak only to have to replace it again. Third rime I went treated. I had 6mil plastic on the ground, plenty of vents but with humidity close to 100 percent all summer it doesnít help. I wound up doing it in the whole house. I did let it dry for about 4 months before I put my finished flooring though. In our bathroom I had some termite damage about 15 years ago. Well we decided to remodel. Moved shower and commode and sinks to all new locations. I used treated plywood and thatís the only plywood in the whole house I didnt have to replace. We didnít actually flood but had water up to the bottom of the joists for five days. Had a hell of time trying to get the place to dry out. Warped all our wood floors on the downstairs floor. I believe advantech is better in most situations. But itís nothing but treated for me in south LA


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Old 03-22-2018, 08:26 AM   #5
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Re: Replacing water damaged subfloor in bathrooms.


Blue wood and pink wood have showed the house dry's fast after a flood, perhaps it should be considered in high humidity areas. It is available in liquid.
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Old 03-22-2018, 08:22 PM   #6
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Re: Replacing water damaged subfloor in bathrooms.


this was about 4 days after flood still trying to dry everything out. This is the section that had treated plywood. You can see all the water beading on the bottom of the plywood. The rest of the house subfloor just soaked up the water which is what buckled all our hardwood floors.


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Old 03-22-2018, 08:23 PM   #7
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Re: Replacing water damaged subfloor in bathrooms.


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Blue wood and pink wood have showed the house dry's fast after a flood, perhaps it should be considered in high humidity areas. It is available in liquid.


Thanks for posting. Didnít know such a product existed


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Old 03-22-2018, 08:28 PM   #8
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Re: Replacing water damaged subfloor in bathrooms.


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Thanks for posting. Didnít know such a product existed


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Mike Holmes did a show about a flooded area and the basements finished with blue wood was drying out much fast. I have not seen it here yet.
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Old 03-22-2018, 08:37 PM   #9
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Re: Replacing water damaged subfloor in bathrooms.


this was about 7 days after. Still trying to dry out


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Old 03-22-2018, 08:40 PM   #10
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Re: Replacing water damaged subfloor in bathrooms.


this was about a month later. Which is why we tore everything up and went back with treated. Look at the stuff growing. Sorry, didnít intentionally want to hijack your thread


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Old 03-22-2018, 08:42 PM   #11
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Re: Replacing water damaged subfloor in bathrooms.


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this was about 7 days after. Still trying to dry out


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How often does this happen?
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Old 03-22-2018, 08:48 PM   #12
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Re: Replacing water damaged subfloor in bathrooms.


I've lived here 27 years. The fella I bought the property from owned it since the 40's. He said it never flooded. It never flooded until last year. Freak no named storm. Rained 36" in one day over about a 45 mile area. Just kept raining, wouldn't stop. Hope it never happens again.
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Old 03-22-2018, 08:54 PM   #13
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Re: Replacing water damaged subfloor in bathrooms.


You need a house boat. I would dig a perimeter drain a sump pump on the outside.

We have houses in the flood plain here and now the new code is to raise the ground level for the house to above the 100 year flood level
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Old 03-22-2018, 09:13 PM   #14
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Re: Replacing water damaged subfloor in bathrooms.


Lol. I did that week. I had to rescue my sister and her family. They were on their roof. She lives about 5 miles away. Took me about 6 hours to get there. Had to rescue my ex wife too. She had spent the night in the back of a pickup truck because her place flooded. Had my wife, my ex wife, my sister and her family and my son and one of my granddaughters and 7 dogs for 5 or 6 days at my house while it was flooding. I was so glad when the water receded lol
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