Wall Systems - Framing Problems

Also included are framing members around openings, jack studs, cripples and lintels.

Most homes in North America have walls that are platform-framed, resting on the floor system below and supporting the floor system above. In some instances, balloon-framing is still used where wall framing is continuous over a number of floors, without interruption at floors as shown in Figures 8a and 8b.

Figure 8a - Platform Framing

Figure 8b - Balloon Framing

Table 1 - Framing Problems
Area	Primary Consideration	Problem	Cause
Framing Problems	Structural Deterioration	Structural deterioration of wall-framing members and sheathing	Moisture in the wall cavity
	Moisture and Wood	Wall deformation caused by shrinkage	Wet lumber
		Weakened wall studs	Poor installation procedures resulting in studs being out of plumb, or weakening through excessive notching and drilling of bearing walls
		Cold interior surfaces promoting condensation and growth of molds and mildew	Thermal bridging across solid elements of the wall assembly.

Continued.......