Make life easy, search the forum.

Discuss Bathroom floor advice needed... in the Tiling Advice | Tile Forum area at TilersForums. USA and UK Tiling Forum

Reaction score
0
Please checkout the following advertisement.
Hi all, new member and my first post...
I’m doing a full bathroom refurb. I last did it about 12yrs ago and that job lasted with no leaks or lifting or cracked tiles etc. But from some up to date research, previous job was all wrong. 6mm plywood screwed down on t&g floor boards, sealed with pva then tiled over with tubbed unibond wooden floor stuff. But as said that job has lasted 12yrs.
Change of decor has forced this refurb...
Anyway back to the job. I’ve screwed down 12mm WBP, I ordered external WBP, but to my horror and only noticed when plywood was fitted and screwed, they delivered internal grade stuff. The floor is now very solid with no creaks or movement and I have 6mm backer boards to fit over the plywood.
Can I stick with the plywood that’s now fitted?
How do I fit the backer board? Is 25mm turbo gold scews enough without using https://www.tilersforums.com/forums/tile-adhesive/. My fear with https://www.tilersforums.com/forums/tile-adhesive/ on the plywood is that it is not external grade stuff.
If https://www.tilersforums.com/forums/tile-adhesive/ is 100% needed as a thin set between plywood and backer board, do I need to seal/prime the plywood.
What tape do I use on the backer board joints?

Thanks...
 

jdnest

-
Reaction score
1
Hi all, new member and my first post...
I’m doing a full bathroom refurb. I last did it about 12yrs ago and that job lasted with no leaks or lifting or cracked tiles etc. But from some up to date research, previous job was all wrong. 6mm plywood screwed down on t&g floor boards, sealed with pva then tiled over with tubbed unibond wooden floor stuff. But as said that job has lasted 12yrs.
Change of decor has forced this refurb...
Anyway back to the job. I’ve screwed down 12mm WBP, I ordered external WBP, but to my horror and only noticed when plywood was fitted and screwed, they delivered internal grade stuff. The floor is now very solid with no creaks or movement and I have 6mm backer boards to fit over the plywood.
Can I stick with the plywood that’s now fitted?
How do I fit the backer board? Is 25mm turbo gold scews enough without using https://www.tilersforums.com/forums/tile-adhesive/. My fear with https://www.tilersforums.com/forums/tile-adhesive/ on the plywood is that it is not external grade stuff.
If https://www.tilersforums.com/forums/tile-adhesive/ is 100% needed as a thin set between plywood and backer board, do I need to seal/prime the plywood.
What tape do I use on the backer board joints?

Thanks...


Hi

I'd say you'd be ok with normal ply, but I would SBR prime it all over before fitting, especially the edges. You can use some thing like Ultra Tile Pro Primer or even external grade wood glue slightly watered down to seal the ply.

You can use normal screws, making sure they're countersunk, or Hardiebacker do specific screws for that purpose that are also https://www.tilersforums.com/forums/tile-adhesive/ resistant. I would definitely use S1 https://www.tilersforums.com/forums/tile-adhesive/ between the ply and Backerboard and screwed down spacing as per their instructions.

I always give the backer a coating of primer too, just belt and braces really.

Hardie make a tape specific for joins so put that down with thinset too, or another mesh tape will be fine I'm sure.

Depending on what you're doing, you could use an uncoupling membrane too, but no need if its under a shower tray/bath...

Hope that helps...
 

Anthony

TF
Esteemed
Arms
Pro
Reaction score
16
Why not just use 12mm cement board? Get rid of the ply all together screw down every 150mm/200mm use an s1 https://www.tilersforums.com/forums/tile-adhesive/ (ultra’s my choice) job done. The less timber involved. The better in my book!
 

Reply to Bathroom floor advice needed... in the Tiling Advice | Tile Forum area at TilersForums.com

Or checkout our tile training advice or the Tile Standards

This website is hosted and managed by www.untoldmedia.co.uk. Creating content since 2001.

New Tiling Questions

UK Tiling Forum Stats

Threads
66,601
Messages
866,709
Members
9,513
Latest member
05jtaylor
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock