John Feyen and Sharon Murphy install support ribs for the second half of the collector. Note how the pig-raisin' people have cleverly — and economically — used the original roof of the barn as part of their collector! The lumber comes from trees cut on their own land, and the ductwork is made of inexpensive pressed board, so the biggest material expense was for the fiberglass resin skin (the film used in the first collector cost $270).