Started installing two 100 watt panels on the roof today.
I drilled a small pilot hole for the mounting screws, drill bit goes right thru, like hardly any material there, roof can't be more that a 1/4" thick (I'm being generous). I turn the screw in to test the hold, get to the end and the screw keeps turning, never able to tighten, dam what's this roof made of, 1/8" plywood? The previous owner had a laminate of sorts installed over original roof so i can't tell what the original is made of (i know thin plywood from my exploratory drill hole). I decided since I can't get screws to tighten the only sure way of holding the panels to roof would be toggle bolts.
With the smallest toggle bolts I had to drill a 3/8" hole for the toggle to fit thru, yikes I hate holes in the roof of any size. Then I Dicor the crap out of the bracket and screw.
I'm wondering if the Dicor alone would hold the panel to the roof (like glue)?
I'm not chancing it hence going with the toggle bolts as much as I didn't want to.
What have others used to secure panels to thin roof materiel?
I'm I missing something? I got one more panel to mount.
This job is turning out to be a major hassle at every turn.