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Using Lime

A Technical Workshop on Lime and Mortars

April 29 - May 1, 2019

Natchitoches, LA

| $299

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Jason Church removes deteriorated mortar joints from a wall.

Removing deteriorated mortar joints from a wall.

Join us on April 29-May 1, 2019 in Natchitoches Louisiana for a workshop on the technical aspects of limes and mortars used in historic preservation! The National Center for Preservation Technology and Training and its partners will hold a three-day workshop focusing on understanding and selecting the right lime for repairs to historic structures originally constructed with lime mortars.

The goal of the workshop is to educate conservators, masons, maintenance professionals, contracting officials, and decision makers on different types of limes available in the United States and discuss their strengths, weaknesses, and uses in historic masonry repairs.

Register Now with the Friends of NCPTT (3rd Party Registration)The three-day workshop is offered to a maximum of 30 participants. Learning activities include lectures, demonstrations, and field/lab sessions. The registration fee is $299 per person.

Check back soon for more information.




Meet Our Instructors:

Head Shot of John FidlerJohn Fidler is a British-licensed architect with two postgraduate degrees in building conservation and over 39 years of specialist experience in historic preservation. He sits on ASTM drafting committees C7 Lime and C12 Mortars and Grouts; helped compose BS-EN 459 Building Limes; and chaired BS 8221-2, The Cleaning and Surface Repair of Buildings. Until 2006, he was the Conservation Director of English Heritage in London. His international consultancy practice is now based in Los Angeles.


Head Shot of Fran GaleFran Gale is an architectural conservator with over twenty years experience in the restoration of historic buildings and monuments. Fran earned her MS in historic preservation from Columbia University, specializing in the conservation of architectural materials. She was a founding member of Columbia University’s Center for Preservation Research. Fran is a Professional Associate of the American Institute for Conservation of Historic & Artistic Works since 1987 and is a past Chair of AIC’s Architectural Specialty Group.


Head Shot of Moss RudleyMoss Rudley is Superintendent of the NPS Historic Preservation Training Center (HPTC) in Frederick, MD. He  attended Shepherd College in Shepherdstown, West Virginia and received Degree’s in Business Administration, Civil Engineering and Culinary Arts. He came to the HPTC in 2000 as a tradesperson, and entered into the Exhibits Specialist Training Program in 2004 assigned to the Masonry Division. He received his certificate in 2007 and was promoted to a staff Exhibits Specialist. In 2011, he was selected as Supervisory Exhibit Specialist of the Masonry Division.


John Walsh is a materials scientist who specializes in the analysis and characterization of historical masonry and concrete materials. He is an Adjunct Assistant Professor of Historic Preservation at Columbia GSAPP and the founder and president of Highbridge Materials Consulting, a laboratory firm in Pleasantville, NY. He is committed to fostering a scientific interest in the performance characteristics of building materials within the broader multidisciplinary framework of architecture conservation.


Head shot of Norman Weiss

Norman R. Weiss, trained as an analytical chemist, is recognized for more than fifty years of scientific work with historic structures and cemeteries. He has taught at Columbia University since 1977, and is a visiting faculty member at New York University and the Royal Institute of Art, Stockholm. Prof. Weiss is a Fellow of the Association for Preservation Technology and is Chairman of the Preservation Technology and Training Board of the National Park Service.


Since workshops and conferences fill quickly, please sign up as early as possible. If you need to withdraw from an event, you must contact the organizer in writing via email at jason_church@nps.gov or fax (318) 356-9119.

Cancellations more than 30 days prior to an event will be fully refunded less a $30 administrative fee. No refunds will be available for cancellations within 30 days of the event, but funds may be credited towards a future NCPTT event. If the Friends of NCPTT must cancel an event, you may choose a full refund of the registration fee or a credit for a future Friends of NCPTT event.

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April 29, 2019 @ 8:00 AM
May 1, 2019 @ 5:00 PM
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National Center for Preservation Technology and Training


National Center for Preservation Technology and Training
645 University Parkway, Natchitoches, LA 71457 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