Hardy board VS Cement board for bathroom tub area

Nov 26, 2005
15,188
401
126
I've been fixing up a bathroom taking my time with it. I have the tub installed and the plumbing and electrical work in place. Now I'm about to put up the drywall etc. What would be better for the bathroom tub area? Hardy board or Cement board? This is for a rental and the longer lasting the better ...
 

roguerower

Diamond Member
Nov 18, 2004
4,563
0
76
If you're using tile (i.e. shower, tube, etc) then you're going to want to install a cement tile backer board. Durock is a well known product.

If you're just painting the drywall (i.e. rest of the bathroom), then use a mold/water resistant panel. If you can find one that's combined with an abuse-resistant board (since it's a rental) that would be the best of both worlds.

EDIT (with links):

Moisture/Mold board that is abuse resistant: http://www.usg.com/sheetrock-mold-tough-ar-firecode-core.html

Durock:http://www.usg.com/durock-cement-board.html

It looks like Durock & Hardy Board are the same things, a cement based underlayment.
 
Last edited:

vi edit

Elite Member
Super Moderator
Oct 28, 1999
62,484
8,344
126
Hardiboard is a much more precision cut sheet, and is easier to score and cut. It doesn't have the fiberglass mesh in it and won't chip away on the ends as much as wonderboard/durock. But it also isn't as thick as wonderboard so depending on what you have to butt it up against it might be a little thin.

It's more expensive though. Around $15 for a 3x5 sheet of the 1/2". Durock is like $9 for the same thing.

My Dad is a mason and has done tile for years and swears by durock/concrete board/wonderboard whatever you call it and thumbs his nose at Hardiboard. I've used both and the Hardiboard is easier to work with in my experience.
 

mmntech

Lifer
Sep 20, 2007
17,501
12
0
If you're using tile (i.e. shower, tube, etc) then you're going to want to install a cement tile backer board. Durock is a well known product.

If you're just painting the drywall (i.e. rest of the bathroom), then use a mold/water resistant panel. If you can find one that's combined with an abuse-resistant board (since it's a rental) that would be the best of both worlds.

EDIT (with links):

Moisture/Mold board that is abuse resistant: http://www.usg.com/sheetrock-mold-tough-ar-firecode-core.html

Durock:http://www.usg.com/durock-cement-board.html

It looks like Durock & Hardy Board are the same things, a cement based underlayment.

Used something very similar to Durock in my own bathroom. Works great.
 

Greenman

Lifer
Oct 15, 1999
21,693
6,133
136
Hardiboard is a much more precision cut sheet, and is easier to score and cut. It doesn't have the fiberglass mesh in it and won't chip away on the ends as much as wonderboard/durock. But it also isn't as thick as wonderboard so depending on what you have to butt it up against it might be a little thin.

It's more expensive though. Around $15 for a 3x5 sheet of the 1/2". Durock is like $9 for the same thing.

My Dad is a mason and has done tile for years and swears by durock/concrete board/wonderboard whatever you call it and thumbs his nose at Hardiboard. I've used both and the Hardiboard is easier to work with in my experience.

Hardibacker comes in both 1/4" and 1/2" thickness. The 1/2" is what you use on walls. I never score and snap hardibacker, I use a sheer. While a nice way to cut the stuff, it's not worth buying for one project.
 

DrPizza

Administrator Elite Member Goat Whisperer
Mar 5, 2001
49,601
167
111
www.slatebrookfarm.com
I like the hardiboard, but because it's thinner, I felt more comfortable putting drywall behind it before installing it. (Not sure if that's necessary or not.) It seemed like a less messy, more precise, albeit slightly more expensive option. For the final results though, I don't think there's much of a difference between the two, but don't have the experience to say so with any certainty.
 

drnickriviera

Platinum Member
Jan 30, 2001
2,443
250
136
Either one is better than the moisture resistant drywall most builders put behind it. I prefer hardi, but will use either
 

AlienCraft

Lifer
Nov 23, 2002
10,539
0
0
One is a Brand name, the other a generic term that also describes the composition of the first.
So, one could say "Yes" in answer to your question(s).
Thank you.
 

Doppel

Lifer
Feb 5, 2011
13,306
3
0
I would go with a waterproof membrane such as this: http://www.schluter.com/8_1_kerdi.aspx


There is install instructions on their site with recommended backerboard. cementboard/ no mold
Want it done right, do it like Mike!

I would do something like that, too. I'd hate knowing that if (or when) some cracking happens to the mortar over time I could possibly get wetting issues. With a water proof membrane it just doesn't matter.
 

Greenman

Lifer
Oct 15, 1999
21,693
6,133
136
One is a Brand name, the other a generic term that also describes the composition of the first.
So, one could say "Yes" in answer to your question(s).
Thank you.

Incorrect. They are very different materials. Hardibacker isn't as fragile as Durarock or the other cement boards.
 

Greenman

Lifer
Oct 15, 1999
21,693
6,133
136
Want it done right, do it like Mike!

I would do something like that, too. I'd hate knowing that if (or when) some cracking happens to the mortar over time I could possibly get wetting issues. With a water proof membrane it just doesn't matter.

If you want the best system go old school. Wire and mortar over #15 felt paper. I've pulled out showers that were over 60 years old with no detectable leakage.