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-   -   What kind of uderlayment for bathroom (http://www.diychatroom.com/f5/what-kind-uderlayment-bathroom-140679/)

ozweepay 04-18-2012 03:25 PM

What kind of uderlayment for bathroom
 
Hi, I just joined the forums, hoping someone can help me out.
I ripped up the vinyl flooring in our bathroom, and there was a few spots where the wood had some moisture in it. I believe it's called "underlayment", the wood that's stapled to the actual rough wood floor (subfloor?).I ripped up all the wood, it was pressed wood, took a while as it came out in chunks due to the staples every 4". The subfloor hasn't sustained any water damage, only a few colored spots that are drying with a fan. My question is, what kind of wood should I use for the new underlayment? And should I lay a vapor barrier in between the subfloor and underlayment? There wasn't any before, but I don't know if this is common practice. I will be putting new vinyl flooring in, for what it's worth. Thanks for any help, and I apologize for my lack of knowledge.

cablerailing 04-19-2012 08:02 PM

Quote:

Originally Posted by ozweepay (Post 901837)
Hi, I just joined the forums, hoping someone can help me out.
I ripped up the vinyl flooring in our bathroom, and there was a few spots where the wood had some moisture in it. I believe it's called "underlayment", the wood that's stapled to the actual rough wood floor (subfloor?).I ripped up all the wood, it was pressed wood, took a while as it came out in chunks due to the staples every 4". The subfloor hasn't sustained any water damage, only a few colored spots that are drying with a fan. My question is, what kind of wood should I use for the new underlayment? And should I lay a vapor barrier in between the subfloor and underlayment? There wasn't any before, but I don't know if this is common practice. I will be putting new vinyl flooring in, for what it's worth. Thanks for any help, and I apologize for my lack of knowledge.

Pressed wood prolly means ply wood. I would go with the same stuff maybe even pressure treated plywood. It'll cost more but last a hell of lot longer.. Not to sure about the vapor barrier, but since its a bathroom I would put it in.:yes:

gregzoll 04-19-2012 09:12 PM

Check out Georgia Pacific's Dens Shield & DensGuard. I have used the Dens Shield when I tiled our bath floor, and would not hesitate to use it again. Easy to work with, and no extra tools needed to cut it with, since it cuts like Gypsum board.

rusty baker 04-19-2012 09:26 PM

Quote:

Originally Posted by gregzoll (Post 902686)
Check out Georgia Pacific's Dens Shield & DensGuard. I have used the Dens Shield when I tiled our bath floor, and would not hesitate to use it again. Easy to work with, and no extra tools needed to cut it with, since it cuts like Gypsum board.

The poster said vinyl not tile.

rusty baker 04-19-2012 09:29 PM

Quote:

Originally Posted by cablerailing (Post 902647)
Pressed wood prolly means ply wood. I would go with the same stuff maybe even pressure treated plywood. It'll cost more but last a hell of lot longer.. Not to sure about the vapor barrier, but since its a bathroom I would put it in.:yes:

You never use pressure treated wood indoors, the chemicals can cause problems. Use underlayment grade plywood. Stapled just like what you removed. No vapor barrier.

gregzoll 04-19-2012 09:29 PM

Quote:

Originally Posted by rusty baker (Post 902695)
The poster said vinyl not tile.

Either one will still work with vinyl. They just need to seal the seams and along the edge where it meets the wall, so that if water does get on the floor, it does not seep through, or get into the material. A whole lot better than using Luann plywood, which is not waterproof.

JazMan 04-19-2012 09:42 PM

Oz,

I don't know what kind of "pressed wood" underlayment you had, but I doubt it was plywood. Probably OSB or particle board. You should determine what kind of underlayment is recommended by the maker of the new flooring you're gonna install and what's available to you.

And YIKES, you never use pressure treated plywood indoors and especially as an underlayment. :whistling2:

Jaz

rusty baker 04-19-2012 09:42 PM

Quote:

Originally Posted by gregzoll (Post 902700)
Either one will still work with vinyl. They just need to seal the seams and along the edge where it meets the wall, so that if water does get on the floor, it does not seep through, or get into the material. A whole lot better than using Luann plywood, which is not waterproof.

I have been laying vinyl for 40 years and would certainly not use it. Underlayment grade plywood is what all vinyl makers want.

JetSwet 04-20-2012 07:55 AM

Quote:

Originally Posted by ozweepay
Hi, I just joined the forums, hoping someone can help me out.
I ripped up the vinyl flooring in our bathroom, and there was a few spots where the wood had some moisture in it. I believe it's called "underlayment", the wood that's stapled to the actual rough wood floor (subfloor?).I ripped up all the wood, it was pressed wood, took a while as it came out in chunks due to the staples every 4". The subfloor hasn't sustained any water damage, only a few colored spots that are drying with a fan. My question is, what kind of wood should I use for the new underlayment? And should I lay a vapor barrier in between the subfloor and underlayment? There wasn't any before, but I don't know if this is common practice. I will be putting new vinyl flooring in, for what it's worth. Thanks for any help, and I apologize for my lack of knowledge.


You can put 1/4" BC ply down as underlayment in this case. Is this sheet vinyl or tile vinyl?

rusty baker 04-20-2012 08:18 AM

Quote:

Originally Posted by JetSwet (Post 902937)
Is this sheet vinyl or tile vinyl?

Wouldn't matter on the underlayment. Both use the same.

JetSwet 04-20-2012 08:42 AM

Quote:

Originally Posted by rusty baker
Wouldn't matter on the underlayment. Both use the same.

Yeah but if it's sheet then use nails instead of screws?

rusty baker 04-20-2012 09:44 AM

Quote:

Originally Posted by JetSwet (Post 902957)
Yeah but if it's sheet then use nails instead of screws?

You should never use screws anyway. It can cause underlayment to pucker. It should be nailed or stapled and stapled is better.


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