I'm building a shed in Arlington, western Washington state. The shed will contain some infrastructure for a well: a controller, some valves, and a small pressure tank.
I want to ensure the well stuff won't ever freeze. There's not a climate controlled building on this property, so I was planning on insulating the shed and putting a heater in it. I wasn't planning on cooling the shed in the summer.
I'm not sure where to put a vapor barrier:
- Should I put a vapor barrier on the inside of the shed, to prevent the warm air inside from rotting the walls during the winter?
- Should I put a vapor barrier on the outside of the shed, to prevent the warm air outside from rotting the walls during the summer?