On June 29th 2017, Lennar Homes began installation of the second set of Sealed Stucco System installations on two homes in the Lakeside Subdivision in Hudson, Florida.
The two homes were located at 13927 (Lot 14) Tensaw Drive and 13943 (Lot 11) Tensaw Drive respectively.
The purpose of the installation was to demonstrate the Sealed Stucco System and to document its efficacy when compared to an unmodified ASTM C-926 and ASTM C-1063 7/8, 3 coat stucco system.
Until recently (circa 2004) ASTM C-926 stucco provisions were regionally modified. Without these modifications, they have now been failing for several reasons related to ignoring those time proven necessary modifications for installation, accessories, attachments, coatings and sealants.
Previously, on November 28th 2016, Lennar installed the Sealed Stucco System on two homes in the Lakeside Subdivision in Hudson Florida (13937 and 13955 Lugano Court).
The purpose of this installation was to continue the demonstration of the Sealed Stucco System and documentation of its efficacy as a code approved stucco system in opposition to an unmodified ASTM C-926 and ASTM C-1063 7/8, 3 coat stucco system.
The results of the previous installations (see Lennar Report #1 – 12/16/16) yielded a crack free and fault free installation.
Since installations of these Sealed Stucco Systems have been servicing the Florida market for well over a 1/2 century without failure, these results were not only expected – they were intended.
These homes contained 40’ long x 10’ high walls, solidly sheathed with structural panels (OSB), then covered with standard “Tyvek”.
StructaLath was then directly applied (no bond breakers or intermediate plies were added) to the wall with standard pan head lath screws.
No control joints, or corner beads were used (corners were traditionally “rodded”).
A mid-wall transitional weep screed was used to transition the StructaLath/ block wall intersection. Its purpose was to provide a transition screed for the dissimilar bases and was not installed for drainage purposes.
Stucco was then tightly applied by hand using the 3 stroke application methodology, (troweled up, down, and up) to ensure all voids, gaps, air pockets or spaces of the lath were filled with stucco mix. All drainage cavities were intentionally eliminated.
For the comprehensive discussion on the Sealed Stucco System and its implications for construction litigation, see the full article Lennar Installation Report from 8/24/17