6mm Marmox on Walls

[siremastimus]

I have just had my bathroom plastered with bonding on the walls to make them more even in preperation fixing Marmox backer boards. I am planning on fitting 10mm on walls, priming the wall first with BAL SBR (mixed in 2:1 Ratio), then fixing the boards on a bed of mapei keraquick, allowing the adhesive to dry before finally securing with screws. On one wall however where the door is, by the time I add the 10mm for the Marmox boards and the tiles the wall will be near enough flush with the door surround which isn't ideal. Could I use 6mm board on this wall as its well away from the bath and shower? If 6mm is OK would people recommend that I still screw them in or is a bed of adhesive all across the board enough? Tiles arent too large at 380mm x 250mm and wall is quite small?

As always your feedback for a DIYer is greatly appreciated!

[Dave]

Hi...

Still use the 10mm boards, min thickness for walls..

where the architrave is, just remove that first and then add a timber packer to build out and then re-fix architrave.. neatest method and this can be decorated...


hope that helps..

[siremastimus]

Thanks Dave, is there any other option such as priming the bonding or using ply as the hallway has been decorated and `im a little nervous of damaging the hall wall if I try removing architrave?

Does the rest of the plan sound ok, cheers.

[Dave]

Seen as they are light weight then the 6mm will suffice, fully bed the boards and then mechanical fix.

Rest seems fine.

[siremastimus]

OK thanks Dave for your input, will prime wall with the Bal, fully bed and mechanical fix the 6mm

[Gazebo]

Hi

Just wanted to confirm you were going to stick the marmox onto bonding.?


I thought bonding was unsuitable for tiling onto and presuming this stays the same for sticking marmox onto


Some of the others will confirm this either way i'm sure

[siremastimus]

Hi, Yes was going to prime first with SBR then bed onto bonding and mechanically fix once this has dried, is this OK?

[Dave]

The adhesive is to take up unevenness in the substrate, the mechanical fixing will give the strength. The sbr will stop any suction and stabilise the bonding enough. But make sure the fixings are not held just by the bonding. They need to be fixed to something solid.

[siremastimus]

Yeah Thanks was planning on drilling through to the beeze block beneath the bonding and pluggin into this