hi there .. if it's marble flooring that you're talking about that cracked, no worries. it's not really a big issue and patching it up with marble glue will do the job nicely. it's cost efficient and won't even cost a bomb. if the workmanship is good, u might not even notice the crack after it's done. u can try this number (9838 1706 bao) or (9632 8344 lee). as for bamboo flooring, it does warp. u need to spread it open for it to expand and contract for a week before laying.