I've had the foam shoe on the other hoof as well....
I went a few rounds with an archy and his lighting lady here , who wished to have me install 12 cans in a vaulted ceiling, to be spray foamed.
They all backed up to a shingled roof as well .....
My concern was captive heat , from lamps , not the wiring.
There was a flurry of paperwork and manufacturers specs, re> can ,shingle & foam, bantered back/forth, but nothing to directly advocate the install of each in close proximity.
In my view, this should have been considered a listed assembly, or had a field rep visit, etc....
One can't be too careful as an EC, because almost everyone around an EC has either disclaimers(AIA 401 for archy's) or sovereign immunity (state officials)
I can count 12 'dots' in said roof when it snows here....:(
~Sparky, EC, still at large~
Last edited by sparky; 02/21/16 09:32 AM.