Continue started self-leveling compound

[Christian Ek]

I was going to self-level our basement floor today and unfortunately I miscalculated quite a bit on how much self-leveling compound would be needed. Quite a hassle, especially when doing it on a Sunday.

Now I wonder if there's anything I need to consider when I continue after buying more self-leveling compound? Will it be possible to apply a thin layer at the "joint" between the old and new? I'm using Hey'di concrete self-leveler which should be able to be applied at 1.5mm minimum

 

[jojo123]

A little primer where there's a seam so the new sticks well, just remember to dampen the old surface otherwise it cures quickly as the water is absorbed where it's thinnest. If there's a raised edge, you can cut it off with a wide putty knife before it has fully set while it's still a bit soft. If there's a dent, a bit of spackel with primer beforehand will do the trick.

 

[Christian Ek]

Ok, so primer on the old grout and then moisten it before I start grouting the rest?

 

[Stefan N]

Yes, primer in the joint is a must. What will you do with the floor afterwards? Surface treatment?

 

[Christian Ek]

Was planning to lay tiles afterwards

 

[Stefan N]

In the worst case, you may need to apply a fine spackling over the entire surface if you want it completely flat.