Hardiboard Installation

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Gary Swart

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My daughter is redoing her bathroom. She is planning on a new 3 piece shower enclosure. It seems that 1/2" Hardiboard is preferred by builders for a backer which is fine, but what is the proper way to deal with seams and especially corners? I assume it would be somewhat like drywall seams with different materials of course. She will not be tiling the walls, just covering with fiberglass panels.
 

Gary Swart

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We're pretty sure that we will have to take whatever backing there is for the current surround totally off to the studs. Are you suggesting we just use green board as a backing for the new surround? Not too clear on why it would be difficult to match 1/2" Hardiboard to 1/2 drywall. Appreciate all the advise.
 

Geniescience

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hardi 500 is 1 cm not 1/2" thick

Gary Swart said:
We're pretty sure that we will have to take whatever backing there is for the current surround totally off to the studs...
i can't figure this sentence out.
Gary Swart said:
...Are you suggesting we just use green board as a backing for the new surround? ...
Yes, any drywall that is 1/2".
Gary Swart said:
Not too clear on why it would be difficult to match 1/2" Hardiboard to 1/2 drywall. Appreciate all the advise.
This is serious. Hardi 500 is not NOT 1/2" thick. Its say so on the James Hardi web site too. (I think it's 1 centimeter thick.) This thickness discrepancy has been mentioned many times on many web discussion forums. It is a lot of work to build up to thicken the wall, and totally unnecessary when starting with 1/2" drywall.

david
 

Jadnashua

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And then, on the other hand, the fiberglass panels on top of the Hardi may just equal the 1/2" drywall that already exists outside of the shower. Go with the manufacturer's recommendation - if they say cbu, use it. If they don't, if this is a multi-piece shower surround, I'd still think about it. The joints could leak. Drywall doesn't like to get wet, even greenboard isn't much better. CBU, doesn't care.
 
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