Wall Systems - Windows and Doors

Windows and doors are two of the most vulnerable elements of the wall system. Not only do they represent the only "moving parts" of the system, but they are subjected to greater temperature differentials than other elements of the wall assembly.

Manufacturers claim that as many as 50 percent of all callbacks relating to windows and doors in new housing could be avoided through better installation practices. This section of the guide identifies the causes and solutions to problems typically witnessed in new housing.

Table 1 - Moisture-Related Factors Influencing Wall Systems
Area	Primary Consideration	Problem	Cause
Windows and Doors	Operating Problems	Difficulty in operation a door or window.	Insufficient tolerances
			Deflection or rotation of lintel
			Warp or distortion of frame
			Thermal bow
			Warp of wood doors
			Inadequate fastening and support of doors
			Lack of final adjustment

Continued.......