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Masonry Cleaning Workshop

APT International

June 17, 2016

Chicago, IL

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Vanderbilt Mansion National Historic Site ( Hyde Park, New York)

Vanderbilt Mansion National Historic Site
( Hyde Park, New York)


  • 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
$200 – APT International members
$275 – 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.
$2,000 – Sustaining sponsor, 3 consecutive workshops, 2 attendees
$1,000 – Platinum 1 workshop, 2 attendees
$750 – Gold 1 workshop, 1 attendee
$500 – Silver 1 workshop, No attendees
Sponsorship contributions help us continue and develop workshops and help us keep costs down for emerging professionals and students. To become a company sponsor for the workshop, please contact administration@apti.org.
AGENDA (7.0 CEUs will be provided)
8:00 am    Registration and Welcome and Coffee and Continental Breakfast
8:30 am    Morning Presentations
1.    Introduction
a.    APT Background
b.    Cleaning Philosophies – Why Clean?
c.    Introduce Speakers and Demonstrators, Thank you to Sponsors
2.    Masonry Materials and Geology
a.    Test Methods
i.      Visual Observations and Optical Microscopy
ii.     Electron Microscopy
b.    Types of Material
i.      Stone
ii.     Brick Masonry
iii.    Terra Cotta
iv.   Concrete/Cast Stone
v.    Mortar
c.    Material Properties
i.     Hardness and porosity factors
ii.    Chemical interactions
iii.   Other cautions and counter-indicators for cleaning
3.    Types of Soiling
a.    Dirt/soot
b.    Efflorescence
c.    Salts
d.    Biologics
i.     Micro
ii.    Macro
iii.   Animal products
e.    Paint/Coatings; visible or not
f.     Graffiti
g.    Metallic staining
h.    Mineral (water) staining
i.     Other

10:30 am    Break

4.    Cleaning Methods Overview
a.    Water methods
i.     Misting
ii.     Low pressure
iii.    Low pressure hot water/steam
iv.   Medium pressure
v.    Detergents
b.    Chemical
i.      Acidic
ii.     Alkaline
iii.    Chelating agents
iv.   Solvent
v.    Biocides
vi.   Poultices
c.    Mechanical
i.     Micro-abrasives, wet & dry systems
ii.    Hand tools
iii.   Dry methods
d.    Laser
e.    Pros and Cons of the various methods

f.     New developments in research

12:00 noon    Lunch

1:00 pm    Afternoon Sessions

5.    Cleaning Protocol
a.    Purposes and principles
b.    Standards and references
c.    Sequence and timing
i.    Duration and drying times
d.    Field considerations
i.    Protection
ii.    Environment
iii.   Mockups
e.    Different approaches
i.    Conservator, engineer, contractor, architect, specialist, etc.
ii.    Pros and cons
f.    Specifications
i.    Methods with options
ii.   Cleaning plan
6.    Hands-on Demonstrations
a.    Water, steam, mist methods
b.    Chemical methods
c.    Micro-abrasive methods
d.    Poultices and latex waterless methods
e.    Laser cleaning methods
7.    Cleaning Q&A Panel – All Speakers

8.    Closing

4:306:00 pm     Cocktail and Appetizer Reception for all speakers and attendees

Amy Lamb Woods, P.E. is an engineer with Simpson Gumpertz & Heger. Her background combines architecture, historic preservation, and materials engineering. From the University of Illinois at Urbana-Champaign she holds a B.S. in Architectural Studies, an M.Arch with a focus on Historic Preservation, and an M.S. in Civil Engineering Building Materials with a focus on concrete and cement chemistry. Ms. Woods has experience in the field of historic preservation and forensic engineering of materials and construction systems. Ms. Woods is on the Board for the Association for Preservation Technology International, a past Director for the International Concrete Repair Institute chapters, on the Easement Committee for Landmarks Illinois, and is an instructor in the Historic Preservation Building Diagnostics class at the School of the Art Institute of Chicago.
Christopher Gembinski, Director, Technical Services, Building Conservation Associates, Inc. and Adjunct Assistant Professor of Architecture, Planning and Preservation, Columbia University. Mr. Gembinski is versed in a wide range of field documentation, architectural material, conservation treatment and historic building maintenance issues through his experience on projects at St. Patrick’s Cathedral, Grand Central Terminal, the New York Hall of Science, the Central Park Obelisk, and the Washington Square Arch. He was co-recipient of a Getty Grant to study previous conservation treatments at Bethesda Terrace with the Central Park Conservancy and the University of Pennsylvania Historic Preservation Department where he completed his MS.
Kyle Normandin is an Associate Principal at Wiss, Janney, Elstner Associates, in Los Angeles, California. He has contributed numerous technical publications on architectural conservation of cultural heritage and continues to serve on the Editorial Advisory Board for the Journal of Architectural Conservation. He is co-editor of Cleaning Techniques in Conservation Practice (London, U.K.: Donhead, 2005). Kyle holds a B.A. in Architecture from UC Berkeley and an M.S. in Historic Preservation from Columbia University in the City of New York. Kyle currently serves as member of APT TCMH committee and serves on the Board of Trustees of California Preservation Foundation.
Lorraine Schnabel is an Architectural Conservator and Owner at Schnabel Conservation L.L.C. She received her B.A. in Geology from Pomona College in Claremont, California. After working as a professional geologist for the US Geological Survey for several years, she attended the Historic Preservation program at Columbia University, obtaining her Master’s degree with a concentration in Architectural Conservation. After a one year post-graduate internship at the then Smithsonian Conservation Analytical Laboratory doing research on marble consolidation she maintained a private architectural conservation practice in New York. Subsequently she relocated to the Philadelphia area where she worked for two different preservation architecture firms before returning to private practice in 2006. Interests and expertise are in masonry conservation, particularly mortars and historic concrete.
Nathela Chatara, CAE
Administrative Director
Association for Preservation Technology International
3085 Stevenson Drive, Suite 200  * Springfield, IL 62703 * 217-529-9039

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June 17, 2016
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Nathela Chatara


Second Presbyterian Church
1936 S Michigan Ave, Chicago, IL 60616 United States
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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