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Tiling Terrace - next problem, drainage mat and edge profile

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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Andyp » 05 Oct 2018, 10:39

Dunno Rog, I only know what I have read on the Schulter website and on a few Tiler forums.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby RogerS » 05 Oct 2018, 11:02

Done a quick Google and remain unconvinced of the need. The only sites I could find are from those companies wanting to 'push' expensive systems. Schluter, BAL etc.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Robert » 05 Oct 2018, 11:30

I skim read the PDF on the site and it mentioned stabilising cracks in substrate so they don't crack the tiles later. Was a skim read though so may not be a reason for it. Struck me as an odd idea too having drainage under impermeable tiles.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Andyp » 05 Oct 2018, 14:34

I have a list of questions to ask on Monday.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Rod » 06 Oct 2018, 00:20

Topps Tiles do a waterproof membrane to isolate tiles from any likelihood of cracking underneath.
£13/m2
Called Durabase.

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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby greeno » 06 Oct 2018, 07:11

Robert wrote:Struck me as an odd idea too having drainage under impermeable tiles.


Whilst the tiles might be, the grout isn't typically.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby RogerS » 06 Oct 2018, 07:24

Rod wrote:Topps Tiles do a waterproof membrane to isolate tiles from any likelihood of cracking underneath.
£13/m2
Called Durabase.

Rod


I think that this is intended for a different function namely for use in a wetroom to protect the underlying flooring in case of water ingress. Not to drain it away per se.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby RogerS » 06 Oct 2018, 15:45

I found this independent article on the web..

https://www.sullivanengineeringllc.com/ ... tallation/

Caveat...the driver for waterproofing balconies etc is to prevent water getting into the building below as far as I can see.

This is an interesting thread as I've got some external tiling to do and I'm not sure that my builder has left me a sufficiently levelled concrete slab. Lots of small ridges from the roller striker.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Andyp » 06 Oct 2018, 18:46

Interesting Roger.

An hypothesis according to my missus and I have learnt not to argue.
Grout on a tiled terrace is bound to crack sooner or later, no? Why do they put expansion joints on a large terrace if there is no movement expected? If there is movement then water can get under the tiles. Water freezes causes more movement, tiles crack, more water gets in etc etc.
The drainage mat provides an out for the water and provides space for water to freeze without damaging tiles.

None of that explains why the correct edge corner profiles were not spec'd on day one.

Expect both the tiler and builder to be here on Monday.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby RogerS » 06 Oct 2018, 23:05

Weep holes. Weep holes.

Same argument, I think.

But have I ever seem water coming out of weep holes ? Has anyone ?

I rest my case .

Get a good slope and there is no water to go down any cracks.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Rod » 07 Oct 2018, 00:07

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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Andyp » 08 Oct 2018, 12:43

Weep holes, snake oil? Maybe.

So tiler and builder here this morning.

Eventually a tiled terrace will get some moisture under the tiles. We do have a good slope. 2cm per meter over 5meter depth. Along the 10 metre width are 3 expansion joints.

Read here:- Uncoupling Theory Parts One and Two. Either use sand or a matt. Movement is inevitable.
http://www.schluter.co.uk/uncoupling-membranes_1.aspx

I spoke with

So we are where we are and will only know if this system works after 10+ years and the tiles are still uncracked and firmly in place. Hard to be certain how old the previous tiling was but it was deteriorating when we moved in and the house was 12 years old then.

Still pi$$ed off that the builder spec'd the wrong edging profile. I have more faith in the tiler knowing his stuff than the builder when it comes to the tiling.

Ho hum.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby RogerS » 08 Oct 2018, 13:28

I'm not sure how much credence I'd give to an article written by a supplier like Schluter.

Just wondering if you'd Googled this to see how much of a problem it really is out there in the 'real' world. Tiling forums maybe ? DIY forums etc.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Andyp » 08 Oct 2018, 14:09

Roger,
I did find a tiling forum the other night and a "pro" suggested that type of matting worked and had images supposedly showing the water flowing out of the edge of the matting. I will have a look again later in my history and see if I can find it again.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Andyp » 09 Oct 2018, 06:12

Roger,
See here
https://www.tilersforums.co.uk/threads/ ... ing.86855/

By all means register and ask further questions.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby RogerS » 09 Oct 2018, 06:22

Thanks, Andy

That Schluter article makes interesting reading. What sort of base are your tiles going down on ? Mine are going down on about 6 " of heavily compacted good quality sub-base topped with about 4" of concrete.
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Andyp » 09 Oct 2018, 07:46

RogerS wrote:What sort of base are your tiles going down on ?


Roger, from earlier in the thread

Image

and

Image
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Re: Tiling Terrace - next problem, drainage mat and edge pro

Postby Andyp » 16 Oct 2018, 16:13

The drainage mat works.

It rained here on Sunday, the ungrouted terrace got soaked, two days later water is still seeping out under the tiles.
C839D2A0-43BD-42F3-AB33-ED80CEC3F592.jpeg
(498.92 KiB)


F03C5016-A990-462E-B936-E3E8D4E7B287.jpeg
(556.16 KiB)


The edge of the matt is soaked as the water reaches the concrete it is drying quickly under the sun. The edge profiles with drainage holes will be fitted onto the concrete and upto the mat. Which can’t be done until the mat is dry.
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