You should be worried when your floors widen at one end, don’t stumble and fall cause that’s trouble, never ignore the small things, we are going to see what causes it and find a solution to it.
sometimes it could be us that cause it and other times, poor drainage which leads to significant deterioration, with a wire brush, clean the crack, with a cold chisel and large hammer, undercut the edges of the crack, with a paintbrush, coat the cracked surface with concrete bonding adhesive I can’t say its the last but for now! yes. The hairline crack is an exposed surface having widths so small as to be barely perceptible.
With #home care managers, we make sure ends meet for you in every way your household should smile.