The International Preservation Trades Workshop is the only annual event in North American which brings the foremost practitioners of the traditional trades together in a single venue dedicated to sharing the skills and knowledge of all of the trades employed in conservation of the built environment. Explore our public website to learn more about the many opportunities for learning and sharing at PTN events throughout the year.

Upcoming events

    • July 24, 2018
    • 8:30 AM
    • July 26, 2018
    • 4:30 AM
    • 111 Highview Drive, Madison Heights, Virginia 24572
    • 7

    Jimmy Price, founder of Virginia Lime Works and Price Masonry Contractors, will be offering a 3 day workshop in Madison Heights, Virginia on July 24-26, 2018. Jimmy’s work and knowledge of the production of building lime from oyster shell and the conservation of historic masonry is respected around the world. These workshops will be limited to 7 participants to allow for one on one instruction.



    Day 1

    8:30-9:00         Introduction

    9:00-10:00       Participants questions / needs or specific concerns

    10:00-12:00     Review/ discussion of above concerns

    12:00-1:00       Lunch

    1:00-2:30         Evaluate and inspection of historic masonry, failure mode of historic masonry and early repairs

    2:30-3:30         Explore three cases of collapse in historic buildings during repair and what happened

    3:30-4:30         How to read a building and inspect them safely


    Day 2

    8:30-9:30         Discussion of different historic mortars that were used, regional and geographic location in the country

    9:30-12:00       How to prepare various the historic mortars as discussed

    12:00-1:00       Lunch

    1:00-2:00         How and why different mortars perform differently and why certain protective and decorative treatments were used in historic masonry ( I call the missing link in historic masonry) !! And how to adapt to the present situation

    2:00-4:30         Beginning of hands on repointing

    Tools that can be used , process and approach, prepping of wall and beginning of cutting out and prepping of joints

    Day 3

    8:30-12:00       Controlling absorption rate, hands on repointing and the different joint details that can be encountered and how to achieve

    12:00-1:00       Lunch

    1:00-3:30         Continue of repointing and details

    3:30-4:30         Wrap up questions and discussion of work performed


    Since workshops and conferences fill quickly, please sign up as early as possible. If you need to withdraw from an event, you must inform the organizer in writing via email

    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

    • August 03, 2018
    • August 04, 2018
    • Gloucester, MA
    • 45


    This 2-day workshop will provide basic information and skills for people who are interested in preserving historic gravestones and cemetery monuments. Each day will have an entirely different focus, and the content will not repeat. Participants are welcome to attend either or both days. The event is raising funds for the Christopher P Robinson International Preservation Trades Exchange Scholarship which will support preservationists who want to travel overseas to expand their skills and knowledge. 

    The instructors donating their services to this effort-

    Rusty Brenner: Texas Cemetery Restoration LLC

    Moss Rudley: National Park Service, Historic Preservation Training Center

    Jonathan Appell: Atlas Preservation Inc.

    Treatments that will be conducted:

    The exact scope of the workshop is partially site specific, varying with the type of stones, and needs of the cemetery where the workshop is conducted.

    * Gravestone cleaning will be discussed, demonstrated and performed. If they are very fragile they can be harmed if cleaned aggressively. Safe cleaning techniques will be explained with options outlined for best product selection.

    * Re-setting of a tablet-stone, which is badly leaning, and or in a sunken condition.

    * We will disassemble and then re-construct a multi-piece monument. This will involve discussion on some material options. The process includes re-leveling the base stone, removal of all joining material, applying boding materials, lowering upper element into base stone safely, and properly re-grading around the stone.

    * The attendees will also learn how to join broken gravestone fragments together employing stone epoxy, clamping and bracing techniques and options.

    * We will discuss the pros and cons of drilling and employing blind pinning.

    * An overhead, lifting tripod will be employed. We will discuss slings and rigging options, and then rig and lift a large monument of some type, which is in need or re-setting due to being unstable for some reason, or one that is already fallen.

    * We will also discuss and demonstrate the materials required, and the process involved in replacing eroded or lost stone with the use of a stone infill material. This includes preparation, application, curing of mortars, color matching, etc.

    * The process and potential need for consolidation of weak and decayed gravestones will be explained. The problems associated with sealing historic gravestones will be covered.

    Location: Clarks Cemetery and First Parish Burial Grounds (National Historic Landmark), Gloucester, MA

    Cost : $100 for 1 day or $150 for both days

    Contact Info: Moss Rudley: phone: 304-261- 1748 or Jon Appell: phone- 860-558- 2785

    • October 26, 2018
    • October 27, 2018
    • Frederick, MD

    The Preservation Trades Network Presents the 22nd Annual International Preservation Trades Workshop

    October 26-28, 2018
    Historic Preservation Training Center
    Frederick, Maryland

    Join us once again as we return to Frederick and the National Park Service’s Historic Preservation Training Center for the 22nd International Preservation Trades Workshop.  It is shaping up to be a great workshop, with the usual variety of demonstrators.  As usual there will be the main dinner and auction to cap off the event.  We have shortened the Workshop to two days this year, to allow for a youth day on Thursday and a community day on Sunday.  The Misia Leonard Scholarship is available for Students wishing to attend, so apply early!  We are planning several workshops ahead of the main event, including gravestone preservation, masonry preservation and window restoration.  We are honored that HPTC has once again opened their doors to us, and brought us home, as it were.  This year honor the legacy of Chris Robinson, who encouraged us all to “Go Big or Go Home”.

    See you in Frederick!

    More information on the pre-IPTW workshops coming soon:

    • Gravestone Preservation (October 24th and 25th) with Jason Church-NCPTT, Moss Rudley-HPTC & Jon Appell-Atlas Preservation
    • Window Restoration (tentative)
    • Timber Framing (tentative)


    Save the date and stay tuned to our website for more information.

    Note: to register as a PTN Member and receive the discounted member registration rate you must be logged in to the Members Only area.

Past events

May 22, 2018 Historic Masonry with Jimmy Price: A Hands-on Workshop
April 17, 2018 The Magic of Scagliola with David Hayles: A Hands-On Workshop
April 17, 2018 Historic Masonry with Jimmy Price: A Hands-on Workshop
April 13, 2018 Gravestone Preservation Workshop
September 08, 2017 IPTW 2017
June 16, 2017 Gravestone Preservation Workshop
September 09, 2016 Barn Tour
September 09, 2016 IPTW 2016
September 07, 2016 Pre-IPTW Workshop: Hard Mortar Removal and Repair
July 22, 2015 IPTW 2015
May 14, 2015 International Trades Education Symposium
September 12, 2014 IPTW 2014
May 16, 2014 Trowel Trades Workshop - Theory & Practice
September 06, 2013 IPTW 2013
September 30, 2012 IPTW 2012, Charleston SC parallel conference with APT
July 15, 2012 Preservation of Wood Windows - "Hands on" workshop
June 10, 2012 Preservation of Steel Windows - Hands On Workshop
August 03, 2011 IPTW 2011 Pre-Conference Tour 2
August 03, 2011 IPTW 2011 Pre-Conference Tour 1
August 02, 2011 Porch Restoration Workshop
August 02, 2011 Painting Historic Buildings
August 02, 2011 IPTW 2011
August 01, 2011 Lead Safety for Renovation, Repair and Painting
July 30, 2011 Timber Frame Sheep Fold Workshop
July 26, 2011 National Window Preservation Summit
May 19, 2011 ITES 2011 - Lincoln, England
May 15, 2011 ITES 2011 - Tour for the Trades
November 19, 2010 PTN Shop Stop No. 2
October 21, 2010 IPTW 2010
October 19, 2010 Gravestone Preservation Workshop - SOLD OUT
October 13, 2010 IPTW 2010 + Log Building Restoration Workshop
October 13, 2010 Historic Log Building Restoration Workshop
June 07, 2010 Shelburne Farms Timber Frame Workshop
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