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Masonry Cleaning Workshop

University of Oregon

May 3, 2019

Portland, OR

| $250

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Masonry Lion

Masonry Lion

RegisterPrinciples, technologies and protocols for cleaning historic masonry have been evolving for decades and continue to evolve.  In this new workshop practicing professionals and contractors systematically present and demonstrate the current state-of-the-art in methods, issues and best practices for cleaning.  Suitable for both emerging and experienced practitioners in preservation, the workshop will include:

•    Cleaning Philosophies
•    Masonry Materials and Geology
•    Types of Soiling
•    Cleaning Methods Overview
•    Cleaning Protocols
•    Hands-on Demonstrations of Various Cleaning Techniques
•    Reference Materials
•    Breakfast and Lunch provided 
•    Plus, Networking Cocktail Reception with the Speakers and Demonstrators

8.0 LU AIA CES Registered credits are available for this one-day workshop. 

•    $250 – APT International members
•    $300 – Non-members
•    $150 – Emerging Professionals (out of school less than 3 years)
•    $50 – Students

To join APT International and become a member please go to www.apti.org.


Friday, May 3, 2019
8:00 – 8:30 am    Registration, Coffee and Continental Breakfast

8:30 – 9:00 am    Welcome & Introduction
Presenter introductions, sponsor acknowledgements, learning objectives and introduction to the workshop beginning with the overarching questions – “Why Clean?”
Amy Lamb Woods, P.E., International Masonry Institute

9:00 – 9:50 am    Understanding Your Substrate    
An overview of the geology and material properties of the substrates to be cleaned – stone, brick, terra cotta and concrete/cast stone.  Risk factors and counter-indicators for cleaning different types of materials – such as hardness or chemical interactions – will be discussed, as well as available test methods for substrates and their potential benefits to developing a cleaning program.
Amanda Thomas Trienens, Cultural Heritage Conservation, LLC

9:50 – 10:40 am    Types of Soiling
The appropriateness and efficacy of different cleaning methods are directly related to the type of soiling to be mitigated or removed.  This presentation will review the nature of different types of soiling – dirt/soot, efflorescence, salts, biologics, metallic or mineral staining, and graffiti, other paints and coatings, whether visible or not – and their susceptibility to removal.
Sarah Holder, PROSOCO, Inc.

10:40 – 11:00 am    BREAK

11:00 – 12:00 pm    Cleaning Methods Overview
An overview of currently available cleaning methods, how they work, and their suitability and risks for different substrates and soiling.  Methods to be presented include:
•    WATER – misting, low and medium pressure, hot water/steam, detergents; 
•    CHEMICAL – acidic, alkaline, chelating agents, solvents, biocides, and poultice methods;
•    MECHANICAL – dry hand tool methods, and wet and dry micro-abrasive systems; and
•    Laser systems

New developments in research and/or trials on masonry cleaning will also be discussed.

Roy Ingraffia, International Masonry Institute

12:00 – 1:00 pm    LUNCH (provided)

1:00 – 1:30 pm    Cleaning Parameters and Protocols
This presentation considers a number of parameters that surround and affect decisions on cleaning – beforehand and during the cleaning project.  These include aligning the purposes of cleaning with expectations, who makes decisions and when, applicable standards, methods of specifying cleaning, developing a cleaning plan, and field considerations such as sequence of work, environment condition, protection, and field testing and mock ups.
Amy Lamb Woods, P.E., International Masonry Institute

1:30 – 4:00 pm    Demonstrations
Attendees will rotate through demonstrations of various cleaning methods by experienced contractors.  Most demonstrations will be performed on the actual masonry of the building.  Demonstrations will include the following categories of cleaning methods:
•    Water, steam, mist methods
•    Chemical methods
•    Micro-abrasive methods
•    Poultices and latex waterless methods
•    Laser cleaning methods

4:00 – 4:30 pm    Q&A Panel Discussion

The day’s activities will conclude with a 30-minute panel discussion with the workshop speakers.

4:30 – 6:00 pm    Cocktail and Appetizer Reception
Continue the dialogue with the speakers, demonstrators, sponsors and attendees over drinks and light appetizers.


Sarah Holder, PROSOCO, Inc.
Sarah Holder is the Preservation Specialist at Prosoco. Within her role, she provides technical support related to historic building materials, material degradation, and product performance. Sarah also helps coordinate training programs to support the needs of the preservation community and is a trainer with the Restoration Training Collaborative, a cooperative hands-on masonry restoration training program between Prosoco and Conproco. She holds a Master of Science in Historic Preservation with a degree concentration in materials conservation from the University of Texas at Austin. Prior to joining PROSOCO, Sarah was the Review and Compliance Coordinator (Section 106) for the Kansas State Historic Preservation Office and held a materials conservation internship with the National Center for Preservation Technology and Training (NCPTT). Sarah is an active member of the Association for Preservation Technology (APT) and currently serves as Chair on the Board of Directors for APT Central Plains Chapter.

Roy Ingraffia, International Masonry Institute
Roy is an Associate of the American Institute of Architects (AIA) and a Professional Associate of the American Institute for Conservation of Historic and Artistic Works (AIC). He is an Architectural Conservator with experience in design and contracting capacities and his professional work has primarily focused on the preservation of historic masonry structures through research of traditional materials, methods, and development of contemporary restoration techniques. In addition to his work with IMI, Roy teaches the Masonry Conservation Seminar within the Graduate Program in Historic Preservation at the University of Pennsylvania.

Amanda Thomas Trienens, Cultural Heritage Conservation, LLC
Amanda Thomas Trienens is an architecture conservator providing preservation design and construction services for historic buildings, sculptures, and monuments through her firm, Cultural Heritage Conservation LLC. Her experience is gained from many years in the field working with a variety of structures and art spanning time from the 11th century to the modern age, both locally and internationally. Amanda specializes in masonry conservation documentation, testing, analysis, quality control, and implementation. She studied architecture conservation at the University of Pennsylvania. 

Amy Lamb Woods, P.E., International Masonry Institute
RegisterAmy Lamb Woods is the Portland Director of Technical Education with the International Masonry Institute (IMI) and a licensed Professional Engineer in Oregon, Washington, Wisconsin, and Minnesota. Her background combines architecture, historic preservation, and civil engineering materials. Ms. Woods has over 18 years of experience in the field of forensic engineering of building materials, both historic and contemporary structures. Her experience includes facade and failure investigations with materials such as brick masonry, terra cotta, stone, concrete, terrazzo, and stucco. Her primary interest is with projects involving the investigation and repair of historic masonry and concrete materials. From the University of Illinois at Urbana-Champaign, Ms. Woods obtained a BS in Architecture, MA in Architecture Historic Preservation, and an MS in Civil Engineering Building Materials with a focus on cement chemistry. She is a Board member for the Association for Preservation Technology International (APT) and founder of Women in Restoration & Engineering (WiRE) and Women in the Built World.

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University of Oregon
University of Oregon/White Stag Building, Portland, OR 97209 United States
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Bonnie Chandler
National Center for Preservation Technology and Training
645 University Parkway
Natchitoches, LA 71457

Email: ncptt[at]nps.gov
Phone: (318) 356-7444
Fax: (318) 356-9119