Building Code and Building Construction - Questions and Answers
Or when you want to know how construction is supposed to be done.

|
AskCodeMan.com
|

Custom Search

Bathroom drywall

Bathroom drywall

New postby stuartmcwh on Mon Jul 31, 2017 10:59 am

I am adding a second bathroom and have a question regards type of drywall to use. it will have a enclosed shower tiled to teh cieling and a standalone tub 3" from wall. can I use green board in entire bathroom including area's getting tiled? House is in FL and is CBS construction.

Thanks in advance
stuartmcwh
 
Posts: 2
Joined: Wed Jul 26, 2017 9:38 am

Re: Bathroom drywall

New postby Jerry Peck - Codeman on Mon Jul 31, 2017 5:13 pm

"Green board", which is "moisture-resistant" gypsum board (MR Board) is not suitable for use on ceilings (without special changes (supports closer spaced that regular gypsum board (i,e, regular "drywall").

MR board is not "water resistant", it is only "moisture resistant" - and there is a big difference between the two. As such, MR board is suitable for use behind ceramic tile in "dry" areas, such as tiled walls in a bathroom which are not behind a sink, not around a tub with a shower, not in a shower - but can be used on walls around a tub without a shower.

Basically, MR board is not suitable for use where there is water.

"Water resistant" gypsum board is available for those areas which get wet from water, such as behind a sink, around a tub with a shower, and for shower walls.

However, the best type of board to use on shower walls is a cementitious board (often called "cement board"), such as Durock (by US Gypsum) and PermaBase (by National Gypsum), however, there are other brands available too.
Jerry Peck - CodeMan
AskCodeMan.com
Construction Litigation Consultant - Retired
Construction and Code Consultant - Semi Retired
User avatar
Jerry Peck - Codeman
Site Admin
 
Posts: 1199
Joined: Fri Dec 12, 2008 12:06 pm


Return to Drywall / gypsum board: non-fire resistance rated; Type X fire-resistance rated; plaster board (blue board); rock lath (for plastering); exterior gypsum sheathing



Who is online

Users browsing this forum: No registered users and 5 guests


cron