Project: Building Masonry Walls

The architect pays a visit to check on progress, while Bob and contractor Bob Ryley begin installing the Paralam rafters. Ryley goes into depth discussing these manmade rafters.

Bob interviews Don Burton from Indiana University as they tour a 1955 greenhouse. Bob then tours a modern state-of-the-art greenhouse under construction at the University.

With the bricklayers on hand, Bob discusses the techniques being used, and explains the “anti-freeze” that has been added to the concrete to retard the cold weather’s effect on the material.