James94 Posted April 4, 2022 Share Posted April 4, 2022 Going to lay a shower former at posi joist level, i have put 2x4 supports beneath for a material to sit on. What would the best/strongest way to make the height up for former to sit on? Regards James Link to comment Share on other sites More sharing options...
James94 Posted April 4, 2022 Author Share Posted April 4, 2022 A quick picture may help to advise. Regards. James Link to comment Share on other sites More sharing options...
Nickfromwales Posted April 4, 2022 Share Posted April 4, 2022 Sheet it with OSB3. 2x 18mm + 1x 11mm. Link to comment Share on other sites More sharing options...
James94 Posted April 4, 2022 Author Share Posted April 4, 2022 Thanks for the reply, so no need to use waterproof ply? Will the former adhere to OSB and what would you recommend for that, think I’m going to be using a jackoboard former. Regards. James Link to comment Share on other sites More sharing options...
Nickfromwales Posted April 4, 2022 Share Posted April 4, 2022 37 minutes ago, James94 said: Thanks for the reply, so no need to use waterproof ply? Will the former adhere to OSB and what would you recommend for that, think I’m going to be using a jackoboard former. Regards. James You can change the 11mm OSB and top the 18’s with a 6mm aqua board / cement panel. Then 5mm of tile adhesive to set the tray in nicely. Link to comment Share on other sites More sharing options...
Nickfromwales Posted April 4, 2022 Share Posted April 4, 2022 Use the correct corrosion proof screws for the cement board ! Link to comment Share on other sites More sharing options...
James94 Posted April 4, 2022 Author Share Posted April 4, 2022 @Nickfromwales Thanks for the help, I’ve got a tiler coming to look Monday and I let him know what I plan to do ready for him tiling. It’s still a while away just trying to get first fix plumbing done so we can. Get plastered out. Regards. James Link to comment Share on other sites More sharing options...
James94 Posted April 19, 2022 Author Share Posted April 19, 2022 I had settled for a jackoboard 1600x900 x30mm linear former but this only comes with the drain in a central position which will not work as I have a joist in centre of each of the openings. I have done a bit of searching and come across this one, has anyone on here had any experience with this model/design, or can recommend one with a flexible outlet position. https://wetroomstop.com/linear-wet-room-kits/wetroomstop-shower-base-900mm-x-1600mm-x-30mm-with-600mm-end-linear-drain.html#/1-tanking_kit-pci_lastogum_3_m/16-drain_cover-reversible/21-waste_trap-dallmer_fast_flow Regards. James Link to comment Share on other sites More sharing options...
James94 Posted May 20, 2022 Author Share Posted May 20, 2022 @Nickfromwales so we’ve got 2 x 18mm layers of osb 3, then a cement board then the wet room former bedded onto that. do I need to adhere the cement board or just screw to the osb? And what adhesive would you recommend for adhering the tray to the cement board? james Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted May 20, 2022 Share Posted May 20, 2022 flexible cement based tile adhesive for sticking cement boards down, or whatever the manufacturer recommends. Link to comment Share on other sites More sharing options...
Nickfromwales Posted May 20, 2022 Share Posted May 20, 2022 Use adhesive for all layers above the OSB. The cement board should be set into adhesive and tapped down to the desired height, making it level and flat. The tray can then be bonded down as per the MI’s. If using tile adhesive to bed the tray, use some of the mix to decontaminate the underside of the tray by scouring it with the mix on a cotton cloth. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now