Ensuite Tiling. SLC on HardieBacker?

[victorianreno]

Hi,

I'm looking for some advice on the best method to level my ensuite floor. The floor is green chipboard over joists. Chipboard is screwed and glued and very secure. Stud walls over the top so no chance/appetite of taking it up to sister joists.

The floor is flat but not 100% level, if it wasn't for the fact we have a shower tray that needs to be installed on top of the finished tile I wouldn't care about making it perfectly level. Shower tray is very low profile and the edges sit on finished tile while bottom of tray sits in the void between tiles and clipboard (just tile around shower tray perimeter).

This is my current plan. 6mm hardie backer (already have), self level, decoupling mat with electric ufh (already have), tiles (50mm x 50mm marble msoaic). Is this the correct order? Anything specific for how to SLC over hardie backer?

Thanks

 

[Dave]

Hi. Hardibacker the floor. Prime . Then install the UFH and slc to encapsulate the ufh wires and level the floor at the same time.

 

[victorianreno]

Hi. Hardibacker the floor. Prime . Then install the UFH and slc to encapsulate the ufh wires and level the floor at the same time.

Thanks, what primer do you suggest on HB?
Also I've got ditra electric ufh matt which suggest floor Leveling should be done prior to installation (not on top).

 

[Dave]

Thanks, what primer do you suggest on HB?
Also I've got ditra electric ufh matt which suggest floor Leveling should be done prior to installation (not on top).

Ah right , that is correct on matting and loose lay system. Prime with an acrylic or sbr primer. 4:1 ratio. This helps adhesion. When levelled and dry , prime the slc as well. Helps the self adhesive matts stick better.

 

[Dan]

Checkout www.uheat.co.uk as they give discounts to members.

Pretty sure they would beat any price for a forum member. So consider checking them out and 14 day return that one if in time.