Just about every week, I get a call or an email that turns into a building science puzzle. While the problems are varied, how you solve them doesn’t change.
First, you understand how heat and moisture move through building assemblies. Second, you follow the advice of your spouse.
My wife of 27 years is a real master at jigsaw puzzles, and she would laugh to learn that I think of myself as a puzzle master of any sort, since I am useless at the jigsaw ones. But she completely agrees that I should use her method of solving jigsaw puzzles in my work on building science problems.
from Building Science http://www.greenbuildingadvisor.com/blogs/dept/building-science/building-science-puzzles-jigsaw-approach