Avelar Announces White Paper on Testing ‘Sticky Stucco’

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Summarizing Two Years of Mockup Panel Testing and Analysis

Haughton and Field report their mockup panels have disproved a wide range of myths and speculation regarding this ‘sticky stucco’ phenomenon.

Richard Avelar & Associates, one of the premier architectural consulting firms in the San Francisco Bay area, today announced that it has published onto the Web a white paper that summarizes key results from two years of mockup testing and analysis of a condition (sometimes called “sticky stucco”) that has been intermittently observed at deconstructed buildings where traditional plaster cement cladding systems have been found to be aggressively bonded to underlying flashing membranes by multiple manufacturers.

Eight rounds of comparative testing, managed by principal contractor Lonnie Haughton and principal architect David M. Field, AIA, encompassed a wide range of material, application, time, curing and performance variables related to stucco mixes, flashings, wraps and papers. The evaluated products included: four bagged stucco cement mixes from different manufacturers; ten flashing membranes (six manufacturers); three asphaltic building papers (three manufacturers); two polymeric wraps (two manufacturers); and two ‘stucco sands’ from separate quarries.

Haughton and Field report their mockup panels have disproved a wide range of myths and speculation regarding this ‘sticky stucco’ phenomenon. Haughton adds: “Our testing clearly demonstrates that this condition is not produced by any specific flashing or cement product from any particular manufacturer.”

An executive summary of their recommendations and findings from this multifaceted evaluation process can be downloaded at: http://www.ravelar.com/articles/sticky_stucco.pdf.    

ABOUT RICHARD AVELAR & ASSOCIATES
Founded in 1976 in Oakland, CA, Richard Avelar & Associates deploys experienced teams of architects, general contractors and code experts throughout the western United States to carry out forensic investigations of failed buildings and to assist related litigation and insurance claim processes. RA&A additionally provides architectural design, contract administration and contractor services for repair and reconstruction projects.

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READER CONTACT
Lonnie Haughton
Richard Avelar & Associates
510-893-5501
http://www.RAvelar.com
lhaughton(at)RAvelar(dot)com

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