So I’m tired of cleaning out rats nests from shooting houses. It doesn’t seem to matter how tight they are built, rats chew their way in where walls/floors/doors/roofs meet. I’d like to build out of reclaimed/scrap material whether it’s plywood, OSB or whatever.

My idea is: somehow procure some sort of cheap metal U-channel moulding or flashing that can be installed on all edges of panels. And L-shapes where appropriate. This way (in theory) every location I rat tries to chew in, he is faced with metal to metal contact. Problem is that stuff will add up to be expensive.

Where can I source an appropriate product in bulk so the project is affordable? I plan on sourcing a salvage metal door separately BTW.