Page 132 - Construction Waterproofing Handbook

ABOVE-GRADE WATERPROOFING 3.21

FIGURE 3.6 Spray application of clear repellent. (Courtesy of Saver Systems)

TABLE 3.11 Coverage Rates for Water Repellents*
Surface Coverage (ft/gal)
Steel-troweled concrete 150–300
Precast concrete 100–250
Textured concrete 100–200
Exposed aggregate concrete 100–200
Brick, dense 100–300
Brick, coarse 75–200
Concrete block, dense 75–150
Concrete block, lightweight 50–100
Natural stones 100–300
Stucco, smooth 125–200
Stucco, coarse 100–150
*Manufacturer’s suggested rates should be referred to for specific
installations. If a second coat is required, coverage will be higher for
second application.

and elastomeric sealers available. However, cementitious systems have several disadvan-
tages, including an inability to bridge cracks that develop in substrates after application.
This can be nullified by installation of control or expansion joints to allow for movement.
In remedial applications where all settlement cracks and shrinkage cracks have already
developed, only expansion joints for thermal movement need be addressed.
These coatings are cement-based products containing finely graded siliceous aggre-
gates that are nonmetallic. Pigments are added for color; proprietary chemicals are added