Reinsforcing a crack in screed before tiling

[John Rumm]

The official bars are twisted square section IIRC.

[meow2222]

No need for texture. Strip/bar can be twisted, wire can be looped & tied, etc

NT

[Tim Watts]

On Monday 06 January 2014 20:01 [e-mail] wrote in uk.d-i-y:

If they are being dropped into thin angle grinder slots, threaded bar would seem to be easier...

[Tony Bryer]

I had to do something similar when extending a floating chipboard floor and just dropped countersunk screws into routed slots, then pouring fibreglass resin over to tie all together. I'm rather doubtful about this sort of strategy wrt a screed floor since the slightest movement will just break the tie out of the screed.

[stuart noble]

So presumably an expansion joint would be a better idea?

[The Natural Philosopher]

I will repeat once more with feeling. I solved this IDENTICAL problem once and for all and permanently simply by pouring half a gallon of PVA down the crack. And carried on pouring till no more would go, several times as it was absorbed into the screed. What it stick to what I have no idea, but stuck it sure did, and once tiled over, the load is spread across the crack anyway by the tiles.

It has never been an issue since.

[Jim K]

One wonders whether the gallon of pva actually added anything? Or whether it was a non-problem in the first place...

Jim K

[Tim Watts]

On Tuesday 07 January 2014 07:46 stuart noble wrote in uk.d-i-y:

Too late for that - there are underfloor heating pipes in the screed.

Also, a joint should not be necessary on such a small floor...

[The Natural Philosopher]

One doesn't wonder. One knows. an area of screed about 2 sq meters was cracked all round and rocked when you trod on it.

After pouring down the PVA it didnt.

I had up to 3mm gaps in the cracks.

I was laid over UFH pipes and polystyrene

Unlike some people I am talking from actual experience, not armchair theorising with not a single calculation to back any of it up.

I designed and project managed my own house. Have you done that?

[Tim Watts]

On Tuesday 07 January 2014 13:55 The Natural Philosopher wrote in uk.d-i-y:

Well, can't argue with that :)

I'll probably still put some ties in though - I'm like that (belt and braces)...

Designed the renovations (which were more or less back to shell).