10:08AM | 05/14/01
Member Since: 03/12/01
40 lifetime posts
we are remodeling a bathroom with a walkin-shower. we've had moisture problems and are pulling out all the dry wall.

We plan to use tub surround walls, not tile.

Do we use the greenboard in the shower area or do we use the heavier cement board (even though it's typically only for tile), wouldn't this be a better board to use for longivety of water proofing?

Thanks in advance!

Jay J

04:09PM | 05/14/01
Member Since: 10/26/00
782 lifetime posts
Hi tammys,

Wherever water can come in contact w/the wall, you want something like tile or fiberglass to keep water from getting behind anything (which I think you already know.) Where you DON'T have the possibility of water coming in direct contact w/a wall, you can use Green Backerboard. BUT, you'll want to PRIME/SEAL it first, then either paint or paper the wall. Green Board is MOISTURE-resistant; NOT water-resistant.

My best to ya and hope this helps.

Jay J -Moderator

PS: That's why the wall-area in many bathrooms are tiled up to, or just above, the showerhead. Beyond that, water doesn't normally get up there BUT moisture/condensation does. The same principle for sink areas. Tile, or fiberglass, is usually run up to the height of the faucet, or just beyond that (with the same principle as the wall above a showerhead .)


06:02AM | 05/15/01
Member Since: 03/12/01
40 lifetime posts
Jay - thanks for the great advice (on both posts).

We are planning on using the shower surround walls around the shower. So, behind that, what should we use? Would the cement board be better than the green board, or do you still have to prime/seal it too?

You mentioned sinks... we are going to put in a new sink and sink cabinent. Do I still need fiberglass above the backside of the cabinent (assuming it has a 3-4 inch wall on the backside)? What about the side walls around the sink, do you still need the tile?

I GREATLY Appreciate your help! We are doing a lot of remodeling and trying to get as much info as we can!!!



07:45AM | 05/15/01
Member Since: 02/13/01
27 lifetime posts
Greenboard is fine! I would use cement board if you were planning on using ceramic tiles to cover the area.


Jay J

02:39PM | 05/15/01
Member Since: 10/26/00
782 lifetime posts
Hi tammys,

As NickG said, you can use Greenboard except where he noted. To expand on that a little ...

If you're going to be covering the wall with, say, surround, then you needn't prime it. You only need to prime if you're doing things to the wall that require it to be sealed from what's being 'put' over it. For example, paint or wallpaper or contact paper or whatever. If you're already putting a water-resistant / water-proof material over the greenboard, leave the board as is because if water were to get behind the material that's covering it (surround), then NO amount of priming/sealing is going to work! See what I mean?

As far as what you put 'behind' the sink, again, I'm only talking about from the countertop, on up. (At that level, you need to 'cover' and caulk to prevent water from getting down behind the countertop. Soooo, to answer your question, yes, you'll want SOMETHING installed at countertop level, on up to about 12", give or take. As I mentioned previously, get to eye level w/your faucet and draw an imaginary horizontal line from the top of it to the wall. From that point, on up for about 6", you want some protection. You can use fiberglass, tile, or the like. And caulk where the countertop meets the material you pick. Then, in short, you've protected the BOTTOM part of the wall from water. (See what I mean?)

Since you're doing this work yourself and saving quite a few $$$, consider spending some of that saved $$$ on a good Bathroom / Kitchen Remodeling Book. They're at almost any bookstore,, or Home Center. Reader's Digest and Time-Life both make these books. In this case, it's $$$ well spent.

My best to ya and hope this helps.

Jay J -Moderator

PS: You can search the WEB for keywords or phrases having to do w/bathroom remodeling too ...


06:54PM | 03/07/16
When tiling a tub surround do I need to hang drywall behind the concrete board/backerboard?
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