I'm thinking Solarix has had to do this more than once, and hopefully some other installers can chime in too.
My house is Santa Fe/Frontier style with parapet walls and a spray foam roof. I've all but given up on ballasted racks for my install, and am focusing on penetrating mounts. I'm thinking about Ironridge XR100 at about 25 degrees of tilt.
My question is:
When installing the Ironridge standoffs, do you cut a plug through the foam down to the deck plate and attach with 4 lag bolts to the deck plate only? Or do you have to hit a joist?
I see that there are plenty of standoffs with a single lag, but to my knowledge there's no stud finder in the world that's going to allow you to pinpoint a joist through the multiple inches of foam and decking plywood without a bunch of exploration holes.
A follow-up question:
Do you simply re-foam around the standoff like you would any other roof penetration on a flat roof, or do you use some other piece with the standoff in addition to foaming?
Thanks in advance for your help!
My house is Santa Fe/Frontier style with parapet walls and a spray foam roof. I've all but given up on ballasted racks for my install, and am focusing on penetrating mounts. I'm thinking about Ironridge XR100 at about 25 degrees of tilt.
My question is:
When installing the Ironridge standoffs, do you cut a plug through the foam down to the deck plate and attach with 4 lag bolts to the deck plate only? Or do you have to hit a joist?
I see that there are plenty of standoffs with a single lag, but to my knowledge there's no stud finder in the world that's going to allow you to pinpoint a joist through the multiple inches of foam and decking plywood without a bunch of exploration holes.
A follow-up question:
Do you simply re-foam around the standoff like you would any other roof penetration on a flat roof, or do you use some other piece with the standoff in addition to foaming?
Thanks in advance for your help!
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