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That weird dip in the middle of a 20x30 room I did yesterday took me two extra hours to float out because the subfloor was like a trampoline.
Has anyone else found a better way to deal with a springy subfloor besides just piling on the leveling compound and hoping it sets before you have to leave?
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elizabethhayes1mo ago
Actually, leveling compound needs a solid base or it'll crack (learned that the hard way).
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kimr1025d agoTop Commenter
Mixing up cleaning and priming is a super common mistake though. @elizabethhayes I think you're right about needing a solid base, but even a solid base can crack if the subfloor moves at all. I've seen people pour leveler over old tile that's loose and it just cracks right along the grout lines. You really have to check for any flex in the floor first. If the floor bounces when you walk on it, no amount of primer is going to save that pour. Sometimes you need to screw down the subfloor or add blocking underneath before you even think about leveling.
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evan_burns951mo ago
Yeah that "learned the hard way" line from @elizabethhayes hits home. I skipped cleaning the concrete dust once and the whole layer just peeled up. It's not just about being solid, it has to be totally clean and primed too.
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