self leveling compound cracks

[pr1970ster]

Hi

We had self leveling compound laid about a week ago by our builders in our shower room and through to our kitchen/diner, i`ve been cleaning today and i`ve noticed cracking (5 places) and breaking at the edges near the patio doors. It was laid onto plywood boards (in the kitchen area) , concrete in the shower room, but they didnt put any sealant/pva down on the boards first. Could this be whats causing it.
We are going to have floating engineered wood flooring put down on top.
Any ideas if we will be ok, or are we going to have issues later on?

thanks

 

[crazydaze]

The self levelling should not be doing that, it looks to have been mixed incorrectly and certainly laid too thickly in the door area.

You run the very real risk of the screed breaking up under the Floated Engineered Flooring causing crackling noises etc.

 

[dazlight]

Could be stress cracks. If on to thick, more then 6mm it can crack. If not primed and a water mix which it could be I’d say the whole lot needs to come up.

 

[pr1970ster]

ok thanks, not what i was wanting to hear. It also goes under our newly tiled shower room. Will it have to come up? or is there a chance it maybe ok.
I can only see things are going to get worse when the underfloor heating is on.

 

[dazlight]

Can you find out what compound it is ?
All depends if it’s loose. Tap it and if loose then a problem.

 

[pr1970ster]

Can you find out what compound it is ?
All depends if it’s loose. Tap it and if loose then a problem.

Hi its SEALOCRETE SEALOFLOR


https://www.buildbase.co.uk/link/1/3000271_31459_t.pdf

Taping it seems ok, maybe where the cracks join it sounds a bit noisier.

Thanks

 

[dazlight]

Maybe in the parts it’s cracked it’s on more then 5mm. As you are floating on it you should be ok.
Anywhere loose maybe take up and fill it with rapid repair mortar

 

[pr1970ster]

My concern is more the tiled shower room where they used the slc to bring up the level in half of the room and put the electric underfloor heating in there aswell.
Think it needs to be connected up and see what happens. I just wonder what will happen in the depths of winter when its going from cold to hot i can see it cracking.
We have at least used flexible adhesive and grout in there.

 

[dazlight]

Test it mate. Run it low at 1st then turn it up slowly.