They are indeed wood - you should look up some of the old Norwegian churches for a beautiful combination of insane architecture and wooden tiles. The Dragon heads were first used as figure-heads on their ships, to ward off evil spirits and look badass. The Dragon heads made it to churches for presumably the same reason (warding off spirits, not looking badass...)...The roof tiles look like wood (maybe cedar) as they have silvered. The detail in this game!!
Looking forward to it....I was trying to think of a short story for these two pics for the other thread .....I may come back to it...