Originally Posted by mradam
Yep, if it ends up being concrete use a Tap-con or Wedge Bolt (Tap-cons are simpler to use). If metal stud or whatever go with a self-tapping screw and you're good to go.
I'm in nearly the same boat, as a new house that I have purchased has three sliding glass doors. The walls are concrete block, with 3/4" furring strips and then 1/2" drywall.
I need to install curtain rods over all three, each with a length of 88". The center support should be fine, as there is a 4" piece of furring directly over the door (I went in and took pictures during framing). However, each end is going to be over the drywall. I can certainly try to hit the furring strip, drill through that into the concrete with a tapcon. However, I can't be certain that they are centered correctly on each side of the opening. If not, will the 3/4" gap between the drywall and the concrete be any cause for concern since there is no support? I dont want to crank down on the tapcon and cave in the drywall.
I hope that makes sense.
I feel a tapcon will offer the best stregnth, but I'm not sure how to move forward with no support behind the drywall.