Starting with small panel, but not sure how to mount. Yes, I have searched other threads, and nothing addresses what the screws go into. I know about properly sealing them.
The fiberglass on the roof is paper thin - I speak from experience of tearing it open.
Are there trusses or cross members (either Al or wood) which I could find with a stud seeker, so the screws have something to bite into?
Does anyone know for sure the spacing? I imagine the A/C is screwed down to a very firm mount.
Would greatly appreciate feed-back.