Mounting solar panels on fiberglass roof

Vach wrote:
I'm kinda old school too. The tape worked great previously but wouldn't mind a fastener. Would have to be close to 4" long to hit a wood ceiling joist. Hard to get screws that long plus they don't have a lot of hold power. Anyone use lag bolts? They seem a little extreme for the roof and joists.

IIRC, I used 1 1/2" #10 stainless metal screws, through the .125" aluminum mount, through a layer of Eternabond tape, through the aluminum skin, and into the wood rafter. I then sealed around the mounts with Proflex. The holes were drilled.

Here's an interesting video from Eternabond showing what happens when a screw is turned through the tape: Instant screw sealing