Usually I find slate is very dirty so needs to be washed and completely dry before sealing, or take care with grout and adhesive seal when finished must be dry or picture framing !!
Thanks for the extra tips - now you mention it, the sales people did suggest sealing the slates both before and after laying, so I'll do that, and also wash & dry them first.
A couple of other questions while I've your attention too...
Yes, it's a bit of an oxymoron sometimes!
A spiked roller helps a lot.
Foam core boards are fine on the floor providing you don't need the extra rigidity cement boards will give you.
Not to confuse matters, but what about your backer board, then vario pro, or ditra heat, joints sealed, wires in then tile, that saves you levelling, saves time, less layers
Other brands are available, from uheat a forum sponsor too, they sell an elektra kit which is very good value
Pointless using hardie & decoupling systems together
A 10mm backerboard will only decouple and won’t give any structural integrity to the floor. It’s simply an water resistent overlay to stop tiles debonding.
Both hardie, and ditra take out any minimal lateral movement. (Movement from left to right) not up and down.
Ditra Matt should allways be laid above the UFH
Easiest solution for wetrooms is a waterproof decoupling mat with tapped joints and paint the walls if desired (I allways do ) manufactures states only the floors need to be tanked.
