MyFloridaCode.com

You can't apply a decorative cementitous finish over wood framing. Only over
masonry. 

>From the 2001 code: DECORATIVE CEMENTITIOUS COATING. A skim coat, as defined
in ASTM C 926,
of portland cement based plaster applied to concrete or masonry surfaces
intended for cosmetic purposes.


BOAF interpretations:

BOAF #2290
Date: Fri Feb 28 2003
Report #: 2290
Code: Building
Section: 2504
Question:
Is it the intent of 2504, by its reference to ASTM C926 - Table 1, to
require 7/8" thickness, for stucco
applied over wood framing, even if elastomeric paint is applied on top of
the stucco?
Answer:
Yes, and it is required to be three coat work.
Commentary:
ASTM C926 is the application standard for stucco, with or without an
elastomeric paint topcoat.


BOAF Report #: 4198
Code: Building
Section: R703.1, R703.6
Question:
Is it the intent of sections R703.1, 703.6 and the 2005 Supplement section
703.11 to disallow Decorative
Cementitious Coatings other than official cement plaster (stucco) compling
with ASTM C 926?
Answer:
Decorative Cementitious Coatings, as defined in Section R202, are skim coats
and would not meet any of
the standards found in 703.1 or Table 703.11 of the 2005 Supplement.
Commentary:
The building official may accept the manufacturer's specifications and
installation instructions for other
coatings provided they are equivalent (or greater) in weather resistance to
those items specified.


It's stucco. Even if it wasn't, it's a moot point as it's failed to keep
water out of the wall. 


Mark Cramer
Mark Cramer Inspection Services, Inc.
492 20th Ave. 
Indian Rocks Beach, FL 33785
727-595-4211
http://www.BestTampaInspector.com



-----Original Message-----
From: codetalk-bounces at myfloridacode.com
[mailto:codetalk-bounces at myfloridacode.com] On Behalf Of Jack Wingo
Sent: Friday, September 19, 2008 4:20 PM
To: codetalk
Subject: [Florida Code Talk] Cementitious Finish

Hello To All,
A 2 story house built in 2002 after the 2001 FBC became effective.  
First floor walls are poured concrete and second floor walls are frame 
with OSB sub-siding, Tyvek, wire lath with an under coating of what 
appears to be 1 or 2 coats of plaster.  Both 1st and 2nd floor walls 
have what appears to be a stucco finish, that was painted.  The 2nd 
floor walls have no expansion joints and no weep screed.  The homeowners 
have complainted to the builder about water intrusion from wind driven 
rains.  After tropical storm Fay, stalled in our area for several day, 
while dumping several inches of rain, the homeowner removed some 
sections of drywall on the 2nd floor exterior walls.  There is extension 
water damage to the sub-siding and damage to some wall studs. 
During a meeting with the builder and the homeowner, I handed the 
builder a copy of code 2504.2 Exterior Lathing and Plastering, a copy of 
ASTM C 926 and ASTM C 1063, and some pages from the Portland Cement 
Association's "Plaster/Stucco Manuel".  The builder stated he was not 
obligated to the ASTM requirements because he applied a decorative 
cementitious finish in lieu of stucco.  I ask for the name of 
manufacturer, but he refused to provide that information.  He simply 
stated he was not require to install expansion joints and weep screed, 
although he is now on homes he is presently building. 
My questions include, what or who determines if a product is stucco or 
decorative cementitious finish and no matter what the exterior finish 
may be, wouldn't the requirements of expansion joints and weep creed, 
still be required?
Your assistance will be greatly appreciated.
Jack Wingo
Melbourne Beach, FL
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