Calcium Carbonate Efflorescence in Stone Masonry Veneer webinar
Understand the most significant contributors to calcium carbonate efflorescence
By Tim O’Toole
The Mason Contractors Association of America (MCAA) will present Calcium Carbonate Efflorescence in Stone Masonry Veneer on Wednesday, August 21, 2013, at 10:00 AM CDT.
Stone masonry is one of the oldest and most durable construction materials for buildings. While many of the methods employed to construct stone masonry facades date back to the last century and beyond, new construction methods and wall system materials have changed the way Architects view stone cladding. Many buildings are constructed with stone veneer in lieu of the more conventional multi-wythe stone barrier walls of the 19th century. With these changes, the methods employed to construct these walls often also change, which in some areas of the country, have led to increased problems with water permeability and efflorescence formation.
This presentation explores a recently occurring phenomenon observed in many instances of stone veneer construction where severe calcium carbonate deposits form on the exterior of the stone masonry facades. The efflorescence is often accompanied by a significant reduction in the long term performance of the façade and increase frequency of water penetration through the building envelope.
At the conclusion of this session, the attendees will understand the most significant contributors to calcium carbonate efflorescence in order to help specify specific design criteria to obtain the best possible construction for their stone veneer systems.
At the end of the course, the participants will:
- Understand the changes in ashlar and rubble stone masonry construction in recent history
- Understand the mechanisms for the formation of calcium carbonate efflorescence in stone masonry
- Be able to identify the poor construction practices that can lead to aesthetic and serviceability problems in stone veneer
- Be able to employ proper construction methods and quality assurance testing methods to reduce the potential for efflorescence and leakage problems in stone veneer
Mason contractors registered for Masonry Certification will receive 1.00 credits in the Codes and Standards discipline upon completion of this course.
Register for Calcium Carbonate Efflorescence in Stone Masonry Veneer at www.masoncontractors.org/live.
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Visit www.masoncontractors.org/live for more information and to view a full schedule of MCAA’s Live Webinar Series.
About the Author
Tim O’Toole is the Director of Marketing, Education, and Information Technology for the MCAA. He has a Masters in Business Administration from Webster University and has worked in the masonry industry since 2003.