Here's hoping someone (Greg?) is familiar with the internal construction of a Scamp 16 with roof support for a AC unit:
I'm in the planning stages of a roof top solar install and will likely go into more detail on that subject at a later time, however my immediate question is related to the mounting options.
Mounting options for the brackets include epoxy, VHB tape and mechanical fasteners (including rivets or bolts) or some combination of these.
I am leaning toward using VHB tape but the curvature of the roof makes it a little more difficult to get a lot of surface area bonded to whatever brackets I end up using. The most likely location for a single panel is on the raised portion of the roof's front center, ahead of the AC unit.
More importantly, while VHB tape has good resistance to pulling apart, it is somewhat susceptible to sustained sheer forces, therefore it might be prudent to also use a very limited number of mechanical fasteners to prevent the panel from trying to slid backwards along the top of the roof at highway speeds, which would weaken the VHB tape bond over time (as I understand it).
The benefit is using VHP tape is that there are no holes required in the roof and I would like to retain that benefit even if using fasteners also. Since the fasteners used in conjunction with VHB tape will only be used to prevent "creep" they might not need to go through the body of the trailer.
So with all this preamble, I can finally get to my question...
How is the roof in my 2015 Scamp 16 (#4) constructed in regards to support for the air conditioner? Is there wood reinforcement that I could utilize to anchor screws to hold a solar panel bracket in place? Would a stud finder reveal the location of the reinforcement?
Note that brackets could extend on the roof along the sides on the AC unit if needed.
Below is a photo of my trailer's roof with added colored lines which I am using for reference to measurements. Feel free to refer to the photo to describe the internal construction.