Never saw this material before

Flat roof and had snow cover but what is this pattern ?
Never saw it before .



EPDM? Possibly coated with aluminum.

But what is causing that pattern ?

I suppose it could have been epdm and did have a terminator bar at the wall.

I’d also guess it was an EPDM roof. Aluminum roof coatings are typically an asphalt based product so they don’t get along well with an EPDM roof.

It’s not really a pattern as it does not repeat, but I would guess it happened while the coating was drying. I think the Henry website says it best “Aluminum coatings are not well suited for Single Ply roofs.”

Thanks that makes sense.

thats snow bob