Underfloor heating and then Tiling on top - Tile Advice

[Shylo]

Im due to start tiling a Conservertary (4x4) 2moro and im gonna try and lay the tiles (Slate) on top on the underfloor heating.


Do i put a 10mm bed of Adhesive of top of the underfloor heating 1st???????? and i also put it on back of the tiles as well so it will be 20 mm thick


plz help asap

 

[grumpygrouter]

You will be better off skimming with SLC. Try using Mapei Fiberplan. This will give you a great surface to tile onto.

 

[CJ]

As above.

Always easier self levelling first.

Then use a flexi adhesive and grout.

If not.......you could use PTB flexi

 

[sWe]

I always cover UFH with SLC, for five reasons:

It protects the UFH when you put down the tiles.
It's easier to tile when the UFH is already covered.
You don't risk damaging the UFH when tiling.
The risk of damaging the UFH if replacing tiles, or retiling later on, is significatly smaller.
And finally, the heat is distributed better.

I'd recommend covering the UFH with no less than the thickness of the wires/tubes +10mm, preferably +20mm. Too little and you still risk damaing the UFH if/when replacing tiles or retiling, and the heat isn't distributed as well as it could be.

 

[Shylo]

I always cover UFH with SLC, for five reasons:

It protects the UFH when you put down the tiles.
It's easier to tile when the UFH is already covered.
You don't risk damaging the UFH when tiling.
The risk of damaging the UFH if replacing tiles, or retiling later on, is significatly smaller.
And finally, the heat is distributed better.

I'd recommend covering the UFH with no less than the thickness of the wires/tubes +10mm, preferably +20mm. Too little and you still risk damaing the UFH if/when replacing tiles or retiling, and the heat isn't distributed as well as it could be.

So wat you are sayin is ..........use the SLC then lay the UFH on top of it??????

 

[grumpygrouter]

So wat you are sayin is ..........use the SLC then lay the UFH on top of it??????

No, lay your heat mats and then skim over the top with the SLC. When dry, tile on top of your nice smooth surface.

 

[sWe]

Nope, the other way around. Lay the UFH first, then cover it with SLC. if the wires are 5mm thick, I'd recommend pouring atleast a total of 15mm, to get a 10mm cover.

 

[White Room]

Make sure the wires are not loose and are not going to lift when you pour the slc

 

[sWe]

Make sure the wires are not loose and are not going to lift when you pour the slc

Good catch.

 

[doug boardley]

You will be better off skimming with SLC. Try using Mapei Fiberplan. This will give you a great surface to tile onto.

should this only be used as part of a calorie controlled balanced diet?:grinningelf:
excellent advice from the upper echelons!

 

[sWe]

should this only be used as part of a calorie controlled balanced diet?:grinningelf:
excellent advice from the upper echelons!

Well, you'd have to get some older SLC for the protein then, because this one is protein free!

(I'll be well impressed if you get that joke without scrolling down and reading the explanation )



















The protein "Casein", which makes up something like 80% of the protein content in milk, has been used as an additive in different kinds of mortar and adhesives for many many years, but it's becoming less and less common in the building materials industry because it's biological, and a target for bacteria and mold.

 

[doug boardley]

Well, you'd have to get some older SLC for the protein then, because this one is protein free!

(I'll be well impressed if you get that joke without scrolling down and reading the explanation )



















The protein "Casein", which makes up something like 80% of the protein content in milk, has been used as an additive in different kinds of mortar and adhesives for many many years, but it's becoming less and less common in the building materials industry because it's biological, and a target for bacteria and mold.

b****y speechless!!!! enough said haha

 

[Sully]

Has any of you guys heard of the following method?

Insulated screed
Depron Insulation
Haeting Element
Vapor Barrier
WPB Ply
Tiles

I don't like the sound of the ply over this and certainly not with tiles. This spec has been given to me and I'm not too comfortable fixing 18mm 600x300 Limestone slabs onto this.

I would have levelled the cables with slc and tiled from there

Any thoughts?
Andrew

 

[DHTiling]

Any thoughts....deffo asking for a failure there....also how are they going to fix the ply over the heating element...?....and why a vapour barrier..?

 

[Sully]

Any thoughts....deffo asking for a failure there....also how are they going to fix the ply over the heating element...?....and why a vapour barrier..?

These are my thoughts too but this spec is being recommended by what looks like a reputable company and before I start pulling shreds out of it, just wanted some second opinions.