Page 412 - Construction Waterproofing Handbook

10.14 CHAPTER TEN

FIGURE 10.13 Envelope flashing detailing.

Glass or fabric fibers are added to dampproofing materials that allow trowel or
brushable applications by binding the material together in a thicker consistency.
Reinforcement also adds minor durability characteristics to the material, but not water-
repellency capabilities.
Asphaltic products are available in an emulsion formulation (water-based). Besides
allowing easier applications and cleanup, water-based dampproofing materials are breath-
able, allowing vapor transmission in envelope areas, such as parapet wall applications,
where this is necessary.

Hot-applied systems
Both hot asphaltic and coal-tar pitch systems are typically used for below-grade positive appli-
cations. Difficulties involved in installation prohibit most interior (negative) applications.
Materials used in hot-applied systems are typically those used in built-up roofing applica-
tions, with the addition of roofing felts. These are usually applied in a one-coat application.
Difficulties in installations, equipment required, and field quality control has greatly
limited hot-applied system usage. Cold-applied dampproofing systems that meet or exceed