I was asked to help find leaks on this flat roof. I think I did, see pic 2, there were about 5 of these plumbing vents, and four had similar gashes in them, I am guessing it is ice damage.
I still have some questions, pic one is a close up of the roof membrane, those boulders are actually normal sized pea gravel. The membrane looks to be a single layer of roll roofing with granules, then tar on top and then gravel. The flashing was added some time after the roof was installed, its only function seems to be to protect the membrane underneath from damage, flashing is not sealed, just sits on top of the gravel.
Can someone tell me more about this roof construction? It doesn’t seem to sesemble the BUR commercial roofs I am familiar with. The rest of the house had ‘maintenance issues’ too.