I was asked to get some information concerning installing magnesium oxide wallboards. It's a material I just got to know and never worked with, so I want to learn what are requirements for installing these, specifically:

  1. Do I need to make special expansion joints, and - if so - what material is best for to fill the gap?
  2. If expansion joints are not needed - if I fix several of these with some kind of glue (or other compund) so they will form a larger surface - do I need to make some expansion joints then?

My question is about indoor-related works as these wallboards are seens as a substitute to drywall. Any related info (e.g. install manuals) greatly appreciated.

I need answers from hands-on experienced DIY-ers best. These wallboards aren't popular where I live, so I try my luck here, in DIY SE :)

  • 1
    I have only used for a tile backer on walls I usually fill the gap with morter. there is a fiberglass mesh/ tape that could be used in the edge depression and filled like sheetrock but I have no idea how you could sand any high spots, probably best used with a heavy texture or "stomp" pattern – Ed Beal Dec 1 '15 at 14:18
  • @Ed Beal So it just looks like a drywall-way. I was guessing that it can be done like that. Thx for Your input. – Marek Oleszczuk Dec 1 '15 at 14:20
  • I'd never heard of this product. In looking it up, I found this article that might be informative for any other MgO noobs. – JPhi1618 Dec 1 '15 at 14:32

The best place to go for this sort of question is the manufacturer. I deal with National Gypsum, USG, and others ALL THE TIME for questions like this. Typically, the manufacturers web site will have all the design criteria you could ever want - if they don't, I would look for another manufacturer who took the time to make that information available. These guys are generally very willing to help as a seccusful installation always looks good for them. Give them a call.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.