Page 430 - Construction Waterproofing Handbook

10.32 CHAPTER TEN

FIGURE 10.32 Below-grade to above-grade waterproofing transitions. (Courtesy of American
Hydrotech)

FIGURE 10.33 Flashing used for transition detailing.
(Courtesy of Carlisle Corporation)

● Changes in direction
● Concentration of stresses (such as openings in a structural wall)
All such construction details in a composite wall area should be reviewed, and, where
appropriate, control or expansion joints installed. Sealants installed in these areas should
be completed according to the application requirements presented in Chap. 5.
All appurtenances on a building should be checked for watertight integrity. Often-
overlooked items in this category include exhaust ventilators, fresh-air louvers, mechanical
vents, signage, lightning equipment, pipe bollards, and mechanical and electrical piping. All
should be watertight and weather-resistant, including transitions into adjacent materials.
Envelope review then proceeds to roof areas. Roofing systems must be adequately transi-
tioned into the adjacent wall system. This is accomplished either with flashings and coun-
terflashings on a parapet, or edge flashing directly covering adjacent wall facades. As with
vertical portions, roof areas must allow for movement with adequate expansion and control
joints. Additionally, all surfaces should be sloped so as to shed water as quickly as possible.