CertainTeed is expanding its exterior trim product offering with the introduction of Restoration Millwork 3TL — the widest beadboard trim on the market, which installs up to 30 percent faster than standard width beadboard. The company is also introducing Restoration Millwork 2TL, a new 6-inch two-bead beadboard. Both products feature TightLap, a progressive notched shiplap design for a larger concealed nailing area.