Page 428 - Construction Waterproofing Handbook
P. 428
10.30 CHAPTER TEN
FIGURE 10.29 Building envelope detailing.
Weathering of exposed envelope systems creates movement in all materials, and
allowances must provide for this movement. Movement above-grade is created by several
phenomena, as summarized in Table 10.2.
To provide for this movement and volume change, control and expansion joints must be
designed and placed where such movement is expected. Among the envelope locations for
placement of control joints are these:
● Changes in materials
● Changes in plane
● Material volumetric expansion
● Construction joints
● Junction of facade materials to structural components
