Replace the threshold of an exterior door when it shows signs of rot or deterioration. Rotten wooden casings and the riser may need to be replaced as well.

A new door is being installed on the Melrose house. Bob explains that the old door was adequate but had a crack in one of the panels which let in a draft. Lou Sandonato from Moynihan Lumber tells Bob about the features and benefits of the new American Classic Therma-Tru door. The door is made of fiberglass skin, a polyresin interior, and LVL siding, all in a wood jam. It is an engineered door, ready to install and does not require as much maintenance as a normal wood door. Bob talks to Bill Jarzynka from Bill Jarzynka Carpentry about the installation. Jarzynka is preparing the area, clearing away debris with a vacuum, to install a solid base of pressure-treated wood create a new frame for the door. Jarzynka installs the wood slats and a layer of insulation to create the base. Jarzynka will frame the sides with pressure-treated boards to fill the empty space. A board is also nailed in place at the top of the frame to fit the door. Sandonato reviews the three-point locking system in the installed door. Jarzynka then installs the trim surrounding the door.

Bob explains how the Owens Corning Basement Finishing System has added a lot of warmth to the Melrose basement. A mud room was also installed in the home, with a six-panel door on the interior. Bob talks with Lou Sandonato from Moynihan Lumber about the small exterior door of the mud room tha thas just been completed. The previous door had been there since 1921 and is now being replaced with an energy-efficient door. Moynihan Lumber modified an existing door to fit the smaller space. Sandonato explains the modifications that were made to make the door fit. The door is a fiberglass Therma-Tru model that was cut down in height and width to fit the existing opening.