Page 111 - Construction Waterproofing Handbook

2.74 CHAPTER TWO
Although not a substitute for referring to specific manufacturer information on a specific
material, Table 2.10 is a summary and comparison of major below-grade waterproofing sys-
tems. One system or material may not be sufficient for all situations encountered on a par-
ticular project. Once below-grade materials are chosen, they must be detailed into
above-grade envelope materials and systems. This detailing is critical to the success of the
entire building envelope and is discussed further in Chap. 10.

TABLE 2.9 Material Properties of Vapor Barriers

Advantages Disadvantages
Ease of horizontal applications Noneffective waterproofing materials
Prevent moisture transmission Seams
No subslab required Difficult vertical installations

TABLE 2.10 Summary Properties of Below-Grade Materials

Property Cementitious Fluid applied Sheet goods Clay system
Elongation None Excellent Good Fair to good
Chemical and
weathering resistance Good Fair to good Good Fair to good
Difficulty of installation Moderate Simple Difficult Simple
7
1
1
Thickness 8– 16 in 60 mil average 20–60 mil 1 4– 2 in
Horizontal subslab No Yes Yes No
required
Positive or negative Both Positive Positive Positive
system
Areas requiring Coves and cants Millage, especially Laps and seams; Laps,
inspections at changes in plane; at turnups; detailing penetration penetration
control joint detailing and priming at detailing; detailing,
penetrations transition changes in
plane
Repairs Simple Simple Moderate to Moderate
difficult
Protection required *No *Yes *Yes *No
*Note—Manufactured drainage systems should be used in lieu of protection whenever possible and preferably installed with all positive
side applications (Clay system may prohibit use of drainage board.)