in the construction script of each bp you will see where it changes the static mesh for the roof when you select a different roof type. The default roof type is not thatch. That’s why it’s showing a different roof type in the bp. I’m in bed atm so can’t do as much as I’d like right now. Try locate the static mesh with the thatch roof using the content browser if the construction script is too unreadable for you. If it’s bad in the static mesh viewer then try open the offending thatch material instance. Then try open the parent material of the material instance. Then see if the Material shows errors as previously discussed.