| Author |
Message |
Anonymous
| | Posted on Saturday, May 10, 2008 - 02:50 pm: |    |
and is there such a thing as "Portland cement Stucco"? |
Ronald L. Geren, AIA, CSI, CCS, CCCA, SCIP
Senior Member
Username: specman
Post Number: 648
Registered: 03-2003
| | Posted on Saturday, May 10, 2008 - 03:08 pm: | |
In modern terms, portland cement plaster and stucco are one and the same. |
John Regener, AIA, CCS, CCCA, CSI, SCIP
Senior Member
Username: john_regener
Post Number: 391
Registered: 04-2002
| | Posted on Saturday, May 10, 2008 - 09:13 pm: | |
Stucco is the finish coat of a portland cement exterior plaster system. The basecoat (nominal 3/8" thick) is the "scratch" coat. The intermediate coat (nominal 3/8" thick) is the "brown" coat. The finish coat (nominal 1/8" thick) is the "stucco" coat. See ASTM C926 which covers "requirements for the application of full thickness portland cement plaster for exterior (stucco) and interior work." |
Richard Howard, AIA CSI CCS LEED-AP
Senior Member
Username: rick_howard
Post Number: 179
Registered: 07-2003
| | Posted on Monday, May 12, 2008 - 09:03 am: | |
The term "stucco" is often used in a broad sense (erroneously) to indicate finish systems that duplicate the appearance of portland cement plaster, such as EIFS or DEFS (thin-coat sythetic plaster). True stucco is a built-up system as John describes above. While portland cement stucco might be redundant, it does differentiate from the imitators. |
Anonymous
| | Posted on Monday, May 12, 2008 - 10:25 am: | |
Several of our clients have asked that we no longer refer to it as Stucco, but rather Portland Cement Plaster citing ASTM C 926 to avoid confusion - semantics, semantics, semantics! |
Ron Beard CCS
Senior Member
Username: rm_beard_ccs
Post Number: 276
Registered: 10-2002
| | Posted on Monday, May 12, 2008 - 01:23 pm: | |
FWISW:
1779: Inventor Bry Higgins receives a patent for concrete stucco.
1824: British stonemason Joseph Aspdin makes kiln-fired mixture of clay and ground limestone on the Isle of Portland, dubbing his creation "portland cement."
Source: May 2008 issue, This Old House |
Steven Bruneel, AIA, CSI-CDT, LEED-AP
Senior Member
Username: redseca2
Post Number: 106
Registered: 12-2006
| | Posted on Monday, May 12, 2008 - 02:07 pm: | |
In reference to a brown, scratch and topcoat assembly, we provide a definition that "the work of this Section may be referred to as Stucco", just to close the loop and avoid tiresome RFI's.
In other Sections we have a similar comment regarding "curtainwall" and "windowall" in reference to aluminum framed glass and panel systems. I have heard each used in a single sentence in a trailer meeting, by the manufacturer's rep no less, so I might as well give up. |
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