Page 213 - Construction Waterproofing Handbook

3.100 CHAPTER THREE

FIGURE 3.97 EIFS Termination detailing above roof. Note the cant detail to
shed water away from the envelope. (Courtesy of Parex)

Drainage Systems
All EIFS diverter systems provide for drainage system capability that consists of a mois-
ture barrier applied to the substrate, with associated flashing and weep mechanisms to redi-
rect entering water back to the exterior. Even with these drainable systems, water and
moisture can become trapped if the insulation board is adhered directly to the moisture
barrier especially around fasteners and seams. It is recommended as additional protection
that a drainable insulation board or some type of drainage mat be used in all applications
to ensure that entering water is quickly and adequately drained away from the envelope.
Figure 3.100 details a typical drainage insulation board that is recommended for use
with EIFS water-managed systems. Figure 3.101 details a complete schematic detail of an
installation using a waterproof membrane over the substrate and grooved insulation board
attached to the substrate at the high points to permit the proper drainage in the channels.
The system allows entering water to be diverted to the exterior through the manufacturer’s
vented track at the edge termination. Figure 3.102 details a similar system using mechan-
ical fasteners for the insulation.