Question about laying tile over concrete basement floor
I’m getting ready to install tile over the concrete slab in the basement. My question is, how perfectly do I need to make sure the floor is ground level? Aside from the odd small crack (which I plan to patch), it seems mostly quite flat, though I can’t tell if it’s totally level with the ground.
Do I need to apply self-leveling compound to the whole floor before applying the elastomeric waterproofing compound?