Page 108 - Construction Waterproofing Handbook

BELOW-GRADE WATERPROOFING 2.71

FIGURE 2.91 Typical penetration detailing for clay system.
(Courtesy of Cetco Building Materials Group)

FIGURE 2.92 Pile cap detailing for clay system. (Courtesy of Cetco Building Materials Group)

VAPOR BARRIERS

Vapor barriers are not suitable for waterproofing applications. As their name implies, they
prevent transmission of water vapor through a substrate in contact with the soil. Typically
used at slabs-on-grade conditions, they also are used in limited vertical applications.
Vapor barriers are sometimes used in conjunction with other waterproofing systems,
where select areas of the building envelope are not subject to actual water penetration.
Vapor barriers are discussed only to present their differences and unsuitability for envelope
waterproofing.