Leveling Compound Failed - Tile Advice

[Millington Deco]

Has anyone seen self leveling compound fail? I've looked at a floor tiling job and the leveling compound laid 24 hrs ago is crumbling and dusty, it disintegrates when swept in places.
What is the cause of this and how can it be fixed?

 

[hmtiling]

Sounds like too much water when mixed.
If it's a concrete floor you could try a few coats of primer at 1 to 1.

 

[White Room]

Was it a 2 part levelling or just one that water was added to...as above if to much water added.

 

[Chalker]

Depends on the manufacturer. Some you mix with water and some need latex. Get it wrong and you have crumbly cement!

 

[Dave]

Over watering has created a weak mix , needs to be removed , no other way ...

 

[Millington Deco]

Over watering has created a weak mix , needs to be removed , no other way ...

Customer wants to avoid removing it as it's been laid on 20 m2 of underfloor heating wires and insulation boards.

 

[Qwerty]

Customer wants to avoid removing it as it's been laid on 20 m2 of underfloor heating wires and insulation boards.

Sounds like the decision is made then!?
I wouldn't risk it if it's that crumbly, get it up & start again.
What SLC is it? What brand? What mixing quantities were used? Any photos?

 

[hmtiling]

Run away!!

 

[J Sid]

Make?
How was it mixed?
Substrate?
Thickness laid?
Any foot traffic?
Direct sunlight onto floor?

 

[Old Mod]

Doesn't sound as if it'd be too difficult to remove anyway.

 

[J Sid]

Remove yes....
Could be old batch.
Could be laid and not bonded well to unprimed insulation boards with foot traffic breaking it up.
Needs sorting before redoing or it will happen again

 

[Millington Deco]

Customers son works for a builder who did it, unsure of brand, method of application etc. I will recommend he contacts the builder to rectify the floor.

 

[J Sid]

So build did the prep.... Run Forrest run

 

[Just Rizzle]

some one hasn't tread the instruction on the bag if you follow there mix ratios it wont fail also important to seal the floor with suitable primer befor laying

 

[Millington Deco]

Don't think primer will make any difference to this.