Peziza (possibly), on a Roof

Peziza (possibly), on a Roof

Observation - Peziza (possibly), on a Roof. Description: Looks like typical Jelly Ear fruiting bodies, but growing out from under some roof tiles. Can anyone say whether this fungus can grow without having wood to feed on? Or does the infestation have to originate in the roofing timbers?

Looks like typical Jelly Ear fruiting bodies, but growing out from under some roof tiles.

Can anyone say whether this fungus can grow without having wood to feed on? Or does the infestation have to originate in the roofing timbers?