Page 193 - Construction Waterproofing Handbook

3.82 CHAPTER THREE

FIGURE 3.84 Application of liquid membrane to civil project. (Courtesy of LBI Technologies)

Many other systems are used on similar site structures, including sheet systems as
pond liners. Figure 3.87 shows the application of a liquid membrane to a fabric scrim
material to provide an effective barrier. The system can be used exposed as detailed in
Fig. 3.88 for a basin or similar structure, or if traffic is applied (such as a landfill using
heavy trucks and equipment during dumping), a protective topping can be applied as
shown in Fig. 3.89.

ROOFING

Roofing is not defined as a waterproofing system, but it does form an integral part of build-
ing envelopes. Roofing is that portion of a building that prevents water intrusion into hor-
izontal or slightly inclined elevations. Although typically exposed to the elements, roofing
systems can also be internal or sandwiched between other building components.
Several waterproofing systems perform as excellent roofing systems, including fluid-
applied deck coatings. Sheet and fluid systems are also used as sandwich or protected
membranes as roofing components. All these systems allow roof or horizontal portions of
a structure to be used for pedestrian or vehicular traffic. With such applications, insulation
must be placed on the envelope’s interior.
Waterproofing membranes are also used as the membrane portion of inverted roofing.
These systems apply membranes directly to deck substrates, with insulation and ballast
over the membrane to protect it from weathering, including ultraviolet rays.