pouring self-levelling compound to a precise depth - tips?

[smp50]

I need to pour SLC to a precise depth so that it perfectly matches some other surface that's currently higher (by 6mm) than the rest of the sub-floor. What is the best approach for this, should I just pour it as close as I can but ever so slightly too shallow, then smooth the tiny remaining step with a second application? Some 3mm vinyl is going on top so it does need to be pretty flat, I reckon.

I guess that if I pour too much and it flows over the top of the other surface then that's kind of ruined it, so best to pour too little perhaps.

What approach have you taken for this sort of thing?


while I'm here, what's a good way to fix wood down as barriers and dams to contain the SLC? Got to screw them in, pretty much? I tried some kind of super adhesive but that didn't hold onto the concrete at all. How about cardboard and duct tape, I bet that would hold alright.

Thanks!

 

[mikeey84]

I think you have the right idea about getting it to level. Easier to lay more than take it up if its too high!

As for the dams, I used 2x4 cut to length, with a bead of silicone between it and the floor, with the heaviest things you can find (I used a roll of lead flashing I use) on top.

There was some seepage, but if you duck tape immediately after the wood (on the dry side), it protects the floor, and means getting rid of the overspill is quite easy.