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

[Fraser Tiling]

Hello guys, quoting a "Bathroom", 20 square metre floor, partly set falls for linear waste and shower area, to contain self contained sauna and seperate hot tub, and 30 metre walls.
Needs electric undertile heating, tanked for wetroom, and the screed is not yet laid, but will be using quick drying solution.
Plan on using Uheat cable and membrane and seperate tanking kits for edges, walls and membrane joints.
Should deal with possible moisture in screed, cabling on falls and waterproofing.
Anyone see any issues apart from Uheat not having any tested solutions to waterproof directly on matting?

 

[One Day]

I can see lots of potential issues if you're relying on someone else's prep or are you carrying out the things you've described with regards to wet area and falls etc?
Have you looked at ditra heat e and the integration into wet areas? It's brilliant.

 

[Fraser Tiling]

Ditra heat so expensive, both are waterproof and moisture controlling membranes.
Sent a scaled drawing of floor and wall elevations, showing tile layout and position of falls in screed.
Once screeded, the rest is down to me.

 

[Matt Bott]

I wouldn't be so sure ditra heat is waterproof because I don't think you can use sealing band like ditra 25 the sheeting itself is but the joints won't be

 

[Old Mod]

I wouldn't be so sure ditra heat is waterproof because I don't think you can use sealing band like ditra 25 the sheeting itself is but the joints won't be

Haven't you just completed the Schlüter course Matt?

 

[Matt Bott]

Yes and we didn't tape no ditra heat joints

 

[WetSaw]

Do they need to update their information or did they not cover that aspect on the course?

 

[Old Mod]

Yes and we didn't tape no ditra heat joints

I'd ask for your money back then haha
It can be used for waterproofing and moisture equalisation.

 

[Matt Bott]

Please enclose a picture of how you waterproof ditra heat and which of the products you use I brought this up with them already

 

[Old Mod]

You only need to tape the joints for waterproofing,
and taping the joints for use on a green screed is not required unless a sensitive stone is being used.

 

[Old Mod]

Please enclose a picture of how you waterproof ditra heat and which of the products you use I brought this up with them already

You just tape the joints as normal, over the cables, using Kerdi Coll adhesive. Their adhesive IS waterproof.

 

[Matt Bott]

You only need to tape the joints for waterproofing,
and taping the joints for use on a green screed is not required unless a sensitive stone is being used.

Agreed which is the reason I replied considering he said it was waterproof Marc

 

[Old Mod]

Agreed which is the reason I replied considering he said it was waterproof Marc

I don't follow, replied to what Matt?

 

[Matt Bott]

You just tape the joints as normal, over the cables, using Kerdi Coll adhesive. Their adhesive IS waterproof.

pretty sure when I asked this was still in testing

 

[Old Mod]

pretty sure when I asked this was still in testing

What's to test? It's just thick Ditra!

 

[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?