Page 236 - Construction Waterproofing Handbook

RESIDENTIAL WATERPROOFING 4.11

FIGURE 4.4 Proper detailing of residential wall wrap.

elastomeric systems, instead using regular paint finishes, this is not recommended. While
residential construction is low enough in elevation so as not to be exposed too much wind-
driven rain, in severe weather, such as hurricane and cloudbursts, water still can be forced
though cracks in the stucco and applied paint finish directly into interior areas. Even if the
situation is not severe enough to show evidence of direct leakage, water entering continu-
ally though the stucco cracks eventually will lead to mold formation and possible contami-
nation, as discussed in Chap. 9. Therefore, an elastomeric coating is recommended in all
above-grade portions of residential construction on which stucco finishes are to be used.
Sidings, since they are barrier systems, either do not require painting or coatings (vinyl
siding) or have paints or coatings applied to protect the substrate during its life cycle
(cementitious board siding). Brick or stone finishes that have incorporated cavity-wall con-
struction do not necessarily require a clear sealer application, as discussed in Chap. 3, to
protect against water infiltration because the cavity wall will act as a diverter, directing
penetrating water back to the exterior. However, in colder climates, sealer can protect brick
and stone finishes from freeze–thaw cycles and associated spalling of the brick and stone
surfaces.

Exterior insulated finish systems (EIFSs)
EIFSs, or as more commonly referred to in residential construction synthetic stucco sys-
tems, are probably today one of the most well-designed envelope systems for use in both
commercial and residential construction. The specific termination and transition details
provided by the manufacturers of these systems are extremely well done and informa-
tional. They provide exacting installation details down to such situations as the wall pene-
tration for a dryer vent. Furthermore, they provide specific recommendations about
materials for use with the terminations, such as sealants.