first thought maybe someone dropped something and caused the first crack, then , then another, and then the final pic
They are all within a few tile of each other, and inline with the sliding door , which from alot of hidden water damage i replace a good size section of subfloor, but not directly under these area's. If i can supply any additional info to help problem solve let me know, again thanks in advance for any help

They are all within a few tile of each other, and inline with the sliding door , which from alot of hidden water damage i replace a good size section of subfloor, but not directly under these area's. If i can supply any additional info to help problem solve let me know, again thanks in advance for any help