Before you replace the floor, treat for termites. (Yesterdays answer on picture – magnified picture of wasp nest….)
So you decide its time to replace that old flooring in your home and as you take up the old floor you discover damage and concrete cracks. Now is the time to call your termite experts because and trust me on this one you don’t want to put down the floor and then discover you need it treated. This will destroy or at the very least make the new flooring look terrible. Here is some damage from termites and some water damage, I don’t know which came first but my guess is the termites.
Nothing worse in my mind than having to drill grout lines in stone tile, because no matter how good you are it will never look as good as new. So please take a moment and think it through, treat the concrete and then lay the new floor. It will save you money in the long run and more importantly the aggravation of knowing where those drill holes are. Because your mind will focus on those marks, trust me.