Uheat membrane and cable and tanking and moisture control...?

[Matt Bott]

I don't follow, replied to what Matt?

It's early think I need another sleep

 

[J Sid]

ok, for us who haven't do the course how is it waterproofed?
see some YouTube videos what show it being used in wet room with joints not taped.

the only way I see it can be done is to put a waterproof jointing tape under the joint

education me please

 

[Old Mod]

.
the only way I see it can be done is to put a waterproof jointing tape under the joint

Why?

 

[J Sid]

haven't you got wires running across the joints that need waterproofing?

 

[Old Mod]

Well taping the joints with Kerdi Keba & Coll is waterproof mate isn't it. In fact it'll be the only part of the UFH protected from moisture, the rest is just covered with tile adhesive cos unless you tank the Ditra Heat, it'll only stop water going thro the matting, and Ditra don't advocate latexing over it either.
Not that latex is waterproof, but if you tanked it, it would be.
And don't Impey suggest tanking before UFH, so I can't see difference really mate.
Or am I missing something?
And if you're using it for moisture equalisation, you don't need to tape the joints anyway, unless it's moisture sensitive stone.

 

[J Sid]

ok, sorry marc, I need to give this some thought, maybe I'm having a blonde moment

 

[Old Mod]

Mate, don't apologise haha

 

[J Sid]

isn't a electric cable running though the tanking joint a weak point?

 

[Old Mod]

isn't a electric cable running though the tanking joint a weak point?

What of the waterproofing?
If it's totally encased in Kerdi Coll do you think?
Long as cables run parallel to the joints, it'll only cross the joint at one point won't it?