Page 408 - Construction Waterproofing Handbook

10.10 CHAPTER TEN

FIGURE 10.7 Base flashing detail. (Courtesy of Carlisle Corporation)

primary envelope systems, or are used where water vapor or minor amounts of water are
expected to be encountered on an envelope. They are used in below-grade applications
when no hydrostatic pressure is expected, or when it will occur in only the severest of
expected weathering.
Dampproofing systems are available in a variety of materials and systems, including:

● Cementitious systems
● Sheet vapor barriers
● Bituminous dampproofing

Clear water repellents are also sometimes referred to as dampproofing materials
because they are not effective against hydrostatic water pressure. However, clear sealers
typically are applied directly to the face of primary envelope waterproofing materials or
facades. As such, they do not function as dampproofing materials or backup and secondary
systems. Clear water repellents are discussed in detail in Chap. 3.

Cementitious systems
Cementitious dampproofing systems, which are available in a wide range of compositions,
are sometimes referred to as parge coats. Parging is an application of a cementitious mate-
rial applied by trowel to a masonry or concrete surface for dampproofing purposes.
Parging is also used to provide a smooth surface to substrates before waterproofing mate-
rial application.