My roof right now are concrete roof tiles. After hurricane Wilma about
20 tiles broke, cracked and missing. The rest seem to be in good shape. However, many of them have been "shifted" from their original position. They were originally all mortared in (a thick blob of mortar between the tile and the tar paper underneath).Location is Miami, Florida. We don't have snow and freeze/thaw. I have seen posts that suggested the proper method to attach concrete roof tiles is to nail them. I also heard that screwing them is the best. Then I called two local contractors who then said to me "are you crazy? That's what they did out in Weston, nailed every tile to the roof and now nothing but leaks, you can't believe what they are going through". One other contractor told me I was "nuts" to try to reattach all my tiles back on, that it will be more expensive (laborwise) than replacing new tiles on my entire roof. He suggested that he just inject RG45 (?) to a couple of spots and the tiles should stay on their own by their weight and their interlocking edges. I said what if the next hurricane comes? He said well this is a one in a 50 year thing so that's unlikely...
So I am confused whether I should spot fix only what's broken, reattach all loose tiles, or replace my roof. Is the nailing method the proper method but their bad experience is due to poor workmanship and inproper installation? or is it not desirable in south florida?
MC