21x7 - This Old House

The new windows have arrived. They're made from an extruded composive of PVC and sawdust, and we visit Minnesota to see the factory. The crew puts up corner trim using two layers of cementitious board, while mason Lenny Belliveau shows us a new tool that extrudes cement grout like icing for a cake. Lenny forms the new hearth, and the guys move on to installing one of the new windows.