So we combined our visit to the factory last week with a visit with my grandfather. He wasn't aware of any of the details of our project, though he knew it was happening. I told him it was going to be a prefab house and started to explain how prefab construction works, and he stopped me and told me he knew all about it - he'd seen it on Bob Vila (my grandpa is a solid DIYer).
Then I showed him the blog and the design of our house. This is a rough recap of the conversation:
Me: It has an inverted roof.
Me: (Something about modernism)
Grandpa: But how do you shingle it?
Me: (Something about a rubber roof that's less than a 1/2" thick)
Grandpa: (Back to watching the baseball game)