A state-funded study
found a pattern of
by Richard Piper
Soft-coat synthetic-stucco systems typically consist of (from the outside in): a thin polymer-based surface
coat, fiberglass mesh embedded in a base coat of portland-cement and polymer, expanded polystyrene
insulation, adhesive, and substrate. The most common substrate is gypsum sheathing, which is highly
vulnerable to water damage.
Exterior insulation finish systems
(EIFS), also called "synthetic stucco,"
have been used more extensively on
commercial construction than residential
(see "Synthetic Stucco and Insulation
Systems," 6/87). While their use
continues to increase, there are no
product standards other than the manufacturers'
and very little testing has
been done other than by the manufacturers.
The majority of the testing