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-   -   bathroom basement subfloor on concrete slab (http://www.diychatroom.com/f19/bathroom-basement-subfloor-concrete-slab-15743/)

Gus72 01-17-2008 02:46 PM

bathroom basement subfloor on concrete slab
 
What is the best basement subfloor to install over a concrete slab, below grade, northern climate, concrete is level, clean and prepped, for a small 10' x 7' bathroom? I was thinking vapor barrier (polyethylene) with 3/4" plywood over the top. Planning on vinyl flooring for finish, any suggestions?

KUIPORNG 01-17-2008 02:54 PM

use those orange membrane like plastic but with cloths. thing... forget its name somthing like ditel....etc.....they are not flat ...

it is quite expensive but it is very good.....

you can use those other tiling backer blocks but plywood definitely an older technology and shouldn't be used....

amakarevic 01-17-2008 04:22 PM

how thick is this stuff ?

why can't tiles go directly on the concrete ?

should this be done across the whole basement or just in the bathroom ?

if i plan to have carpet in most of my concrete slab basement apartment, does anything need to be in between ?

thx,

- a -

Gus72 01-17-2008 05:47 PM

basement bathroom subfloor
 
Where can I find the orange backer cloth's? Home Depot? What would you recommend instead of a plywood subfloor? I could use sleepers,but I want to keep the height down, I don't want a big lip into the bathroom. Maybe 1" x 2" s?

KUIPORNG 01-18-2008 11:08 AM

the orange stuff is really thin... thickness is neglectable.... that stuff is either called ditel or dicore... I kind of forget....

All Tiles 01-18-2008 11:35 AM

vapor barrier (polyethylene) with 3/4" plywood over the top is what i would use. Remember that basements retain a lot of moisture, therefore, having any kind of padding/sub flooring will make your floors a lot less cold in the winter.

Ron6519 01-18-2008 11:38 AM

Quote:

Originally Posted by KUI****G (Post 89338)
use those orange membrane like plastic but with cloths. thing... forget its name somthing like ditel....etc.....they are not flat ...

it is quite expensive but it is very good.....

you can use those other tiling backer blocks but plywood definitely an older technology and shouldn't be used....

Are you speaking about the ceramic tile product, Ditra? He said he's putting down vinyl. It would really help if you read the post before making incorrect comments especially when the poster didn't realize you were speaking about the wrong product for his stated application.
You can put the vinyl right on the concrete if it's as flat as you say it is.
Ron

KUIPORNG 01-18-2008 01:52 PM

you are right... didn't see it is vinyl.... I thought he will use ceremic tiles.........

Ron6519 01-19-2008 02:35 PM

To minimize the height difference you can put down foamboard down between some sleepers. Decide how high you can live with and use the appropriate thickness foam. As stated before, use a vapor barrier over the concrete.
You could eliminate the floor buildup all together by using electric radiant floor heat and ceramic tile.
Ron

Gus72 01-19-2008 05:57 PM

basement bathroom subfloor
 
Thanks for the reply Ron! I think I will use your idea of foamboard between sleepers. I am trying to keep the cost to a minimum so the electric radiant heat under ceramic tile is a little out of my budget. Thanks again and I'm sure I'll have more questions in the future!


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