Cempolay ultra and air bubbles

[karlhurrell]

I seem to have many air bubbles in the floor after laying the self levelling compound which has left hundreds of holes. It was mixed with a wisk on a drill as instructions advised. What can I do to eliminate air bubbles on the remainder of the floor that I have to do next?

Many thanks

Karl

 

[mac391]

A spiked roller for the new part, it bursts the bubbles as you lay, a carborundum stone for rubbing down the bubbles you missed.

 

[karlhurrell]

The bubbles cause dents they cant be rubbed out. The bubbles are very small so not sure that a roller would hit them all to be honest. Is there a technique to using a wisk maybe?

 

[mac391]

The roller is "spiked" like that of a hedgehog that hasn't been run over and it will catch all of the bubbles as long as you havn't laid the screed too thick.

The carborundum stone is for levelling high spots and levelling feather edge that you use to fill the holes left by the bubbles.

Feather edge is a very fine screed you use for things like this.

Alternatively, after laying the rest of the screed (with a spiked roller) it will work, use what is left in the bucket to fill the holes from the first mix, with a spatula, trowel etc,, then use the stone to rub it down after it's dried.

What floor covering are you going to fit ?

 

[karlhurrell]

I'm not covering it, it's a garage floor which is why I'm using the expensive ultra compound. I'm painting it with 2 PAC paint which is why the holes are bothering me

 

[Petest67]

Did you prime the floor first? If the slab you're going over is very absorbent it can suck the moisture out of the smoothing compound to quickly and this will leave you with what look like bubble holes. Priming stops it happening.