It's possible that you meant one of the following:
* Thatch-eved: This could be a made-up word referring to something that has a thatched roof.
* Thatched eaves: This is a common phrase referring to the part of a thatched roof that overhangs the walls of a building.
Without more context, it's difficult to say for sure what you intended. If you could provide more information about where you encountered this term, I might be able to help you understand its meaning.