The Lime Product Training Workshops which utilize LimeWorks.us Tools and Materials are conducted at our Head Quarters facility located at 3145 State Road, Telford, Pennsylvania 18969.

We share this site at Millhafen Farm, Bucks County with

The Craftwork Training Center

The Craftwork Training Center exists to allow mentors to teach participants various vocational crafts and by doing this elevate the concept that "The ARTS" are a worthwhile Objective to pursue in life. This mission encourages both the experienced and the aspiring artisans of the future to practice and perfect their skills at this center in order to increase their individual marketability and to gain personal enrichment through the experience.

ARTisAn Objective® is the Trademark symbol and it is branded into all of the workshop program titles to emphasize both the Art and the Artisan.

Call 215-536-1776 for schedules on all classes offered

About Specific LimeWorks.us
Workshop Programs


Who are the trainers and what certificates are offered?

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Most all of the standard workshops are taught by the Technical Install Team from LimeWorks.us using the LimeWorks.us product line. Some workshops are taught by specialists in certain masonry art forms as we bring them in on an occasional or a regular basis. Each workshop participant receives a Certificate of Completion mailed to them within two weeks of the program. If the program is for "Certified Installer" or "Certified Trainer" status then the participant who successfully passes the validated training program associated with the products will receive a corresponding certificate which states that they have successfully passed the class and the term for which they are authorized to install or train on products. Certified Installer status may be required on projects where a historic preservation specification was put into place by an Historic Preservation Architect that requires only Certified Installers who have attended our training program which meets ASTM E-2659 Standard Practice for a Certificate Program to be able to bid on the project or be allowed to install the specialized LimeWorks.us products. This level of scrutiny is suggested to architects in order to insure that the products are installed to the highest industry standards. Trainer status is only given to those who have previously become a Certified Installer of a certain product and have passed the "Certified Trainer Program." The Certified Trainer Program is also a validated program which is monitored by the LimeWorks.us staff and meets the ASTM E-2659 Standard Practice for a Certificate Program to test and approve that the Trainer also properly conducts the training class in the manner which the program is designed to be taught.

If it is better for you to have us run the MAS-01 or MAS-05 program at your location on a different date than the posted class schedule to be held in Telford, Pennsylvania we will work around your schedule!

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If any professional masonry company or organization gathers a group of at least 10 participants we will schedule the MAS-01 or MAS-05 program at the group's chosen location anywhere in the USA if the full $1000 per participant price is paid for the 10 or more participants. The participating company will be credited to receive the full $10,000 value of redeemable LimeWorks.us products if the products are obtained within one year of the workshop. This credit can also be broken out to individuals so that each who paid $1000 can receive the $1000 credit toward materials under the same conditions. This offer in essence makes the workshop free for historic masonry restoration companies or groups that can assemble 10 or more interested parties to have these programs brought to them.

Architects and Engineers should know about a special offer for them to observe workshops and earn learning units!

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Architects, Engineers and their firms are invited to observe the MAS-01 workshop and hear supporting information on what to consider when writing a specification for proper historic brick and stone repointing. Architects, Engineers and their firms are also invited to observe the MAS-05 workshop to hear supporting information on what to consider when writing a specification for a proper brick and stone patching repair using the unequaled product called Lithomex. Observing these programs will help professionals in their field to know what to look for when judging the quality of work regarding if it is or is not being carried out in a good and workmanlike manner. The cost is $60 per participant, per program. 4 Learning Units can be self-reported for on-going education for each program attended.




ARTisAn Objective® Workshop MAS-01

Repointing Brick and Stone Using Lime Mortars for Historic Building Restoration
Half Day $350
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This is a half-day hands-on workshop (which runs from approximately 8 am to 12:00 pm) held at The Craftwork Training Center in Telford, PA. The workshop is for those who want to learn to use Natural Hydraulic Lime (NHL) mortars to repoint vintage brick and stone masonry. NHL mortars contain NO Portland Cement. Portland Cement is not required in the NHL mortars that we teach with and which we suggest to use when repointing most vintage brick and stone buildings that were originally built with lime mortar. Portland Cement is known to be harmful for repairing brick and stone masonry buildings when the masonry building was originally built with lime mortar. This is because of the brittleness and non-breathing, dense nature of Portland Cement which can trap moisture in the bedding mortar of a wall leading to potential swelling during freeze/thaw cycles and worse. Portland cement mortar also negatively reacts with salts which accelerate the breakdown of a well-intended replacement mortar that is a "high lime content" mortar which only contains a small amount of Portland Cement. These "high lime content mortars are frequently specified with the intent to make a mortar which is more accommodating to movement and breathability but unfortunately they also undergo pre-mature decay in their service life from these reactions. There are two price points for this workshop. Option #1 for Professionals is $1000 per participant which includes a credit of $1,000 toward future purchases of our materials when the material is redeemed within one year from the date of the program. This in essence makes the workshop free for historic masonry restoration companies. Option #2 is $350 per participant for just the workshop. A $100 non-refundable deposit per person is required two weeks in advance of coming to the program. The hands-on workshop will cover tips and tricks in the proper mixing, placing, texturing, tooling, curing and cleaning when performing repointing work with LimeWorks.us Ecologic™ Mortar which is based on Natural Hydraulic Lime containing No Portland Cement. Ecologic™ Mortar is simply a prepared blend of Natural Hydraulic Lime binder/aggregates and pigments to which you just add water, mix and go to work. Ecologic™ Mortars come in 12 stock colors and the workshop shows how everyone from a DIY to a professional can produce hundreds of new shades by blending them in various degrees. This is helpful for the professional who is called to install mock-up examples for Historic Restoration Architects to review and shows the mason how to tweak the mix to represent various nuances in the original mortar for the architect’s acceptance of the mix design before the whole project were to begin. We will show how to add such inclusions as marble dust, mica, slag flecks, oyster shells, and regional sands and then how to simulate a weathered surface of an historic mortar joint in order to create a close to indistinguishable match to original historic mortar. By practicing these techniques in patch pointing and full re-pointing work the intended outcome for what is being taught is a foremost learning to develop an attention to detail. Honing the development of attention to detail is the beginning of what would ready a participant and a crew to carry out "museum-quality" restoration work. At this workshop we also explain our services for properly sending a sample to our laboratory for custom color simulations. If any professional masonry company or organization gathers a group of at least 10 participants we will schedule a program at the group's chosen location anywhere in the USA if the full $1000 per participant price is paid for the 10 or more participants. The participating company will be credited to receive the full $10,000 value of actual LimeWorks.us products if they are obtained within one year of the workshop. This in essence makes the workshop free for historic masonry restoration companies.

Architects, Engineers and their firms are invited to observe this workshop and hear supporting information on what to consider when writing a specification for a proper historic repointing project and what to look for if work is or is not being carried out in a good and workmanlike manner. The cost is $60 per participant. 4 Learning Units can be self-reported for on-going education.


ARTisAn Objective® Workshop MAS-02

Marker and Monument Cleaning and Repair (Beginner) using "The Graveyard Kit."
Half Day $350
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For beginners in the preservation of historic memorial gravestones. This is an introductory, "half-day", workshop (which runs from approximately 8 am to 12 pm) to show participants what is in the LimeWorks.us "Graveyard Kit" and to discuss various other products and their respective applications. During this workshop participants will gain some experience using some of the items in the kit. The hands-on work may include using the LimeWorks.us recipe to make a natural field-mixed glue for repairing small broken stone elements. The workshop may also include work with waterglass to consolidate friable masonry before using our stone patching materials called Lithomex, which is used to repair broken or missing stone details. Cemetery Conservation Philosophy is discussed and there is a formal outline provided with the program. Cost is $350 per participant. A $100 non-refundable deposit per person is required two weeks in advance of coming to the program. A Graveyard Kit is included with the cost of the program for each participant to keep. This in essence makes the workshop free for participants because $350 is the cost of the Graveyard Kit.


Graveyard Kit Contents
Graveyard Kit

ARTisAn Objective® Workshop MAS-03

Grave Marker and Monument Cleaning and Repair (Intermediary) using "The Graveyard Kit."
Three Days $1000
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For Mid-level participants who already are restoration specialists working in the preservation of historic masonry and/or memorial gravestones. This is an intermediary three-day workshop to work with most all of the products in our Graveyard Kit. This mid-level program further discusses the various products in the kit and their respective applications. We will use the products in the kit and otherwise discuss what they would be used for if only theoretical applications are available at the time and place where the workshop is being held. During this workshop participants will gain some experience using some of the items in the kit. The hands-on work may include using the LimeWorks.us recipe to make a natural field-mixed glue for repairing small broken stone elements. The workshop may also include work with waterglass to consolidate friable masonry before using our stone patching materials called Lithomex, which is used to repair broken or missing stone details. Memorials Conservation Philosophy is discussed and there is a formal outline provided with the program. Cost is $1000 per participant. A $100 non-refundable deposit per person is required two weeks in advance of coming to the program. Minimum group size is 10 participants per program. If any masonry restoration company, church or cemetery conservation organization gathers a group of at least 10 participants we will schedule a program at the group's chosen cemetery location anywhere in the USA. A Graveyard Kit for each participant to keep is included with the cost of the program along with a $250 credit per person toward future purchases of our materials within one year of the program.


Graveyard Kit Contents
Graveyard Kit

ARTisAn Objective® Workshop MAS-04

Repair Existing Flat Wall Plaster
Two Days $700
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What you will achieve:
Practice how to identify, analyze, and repair damaged plaster using the LimeWorks.us Ecologic™ Plaster Repair System. Lunch is included each day of the workshop.

Course objectives or Goals:

  • Discuss the different types of mesh/lath and their proper usage
  • Practice using LimeWorks’ Takcoat™ Platinum, a dynamic product with many uses to ready old walls for repair.
  • Practice installing and finishing the Ecologic™ Plaster TOPCOAT finish.


ARTisAn Objective® Workshop MAS-4.1

Ornamental Plaster Medallion Casting
Two Days $700
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What you will achieve:
Practice how to create a rubber mold "negative" and then to cast a plaster ceiling medallion or plaster enrichment pieces from the negative.

Course objectives or Goals:

  • Practice steps required to replace a missing part or create a new ceiling medallion or an enrichment piece.
  • Practice creating a negative mold
  • Practice pouring a plaster detail


ARTisAn Objective® Workshop MAS-4.2

Running Ornamental Plaster Cornice
Three Days $1000
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What you will achieve:
Practice laying out and running an ornamental plaster cornice.

Course objectives or Goals:

  • Practice preparing the substrate
  • Practice setting lines and guides
  • Learn the consistency of the plaster and proper mixing technique
  • Practice running the in-situ crown molding


ARTisAn Objective® Workshop MAS-05

Basics of using Lithomex. Surface Repair for stone and brick
Half Day $200
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Lithomex is the brick and stone resurfacing and repair system for taking up brick and stone loss. The Lithomex system is a one-of-a-kind patching material for its respective applications, unequalled by others on the market. Learn the values of Lithomex and how to mix and repair a damaged brick or stone face.

Architects, Engineers and their firms are invited to observe this workshop and hear supporting information on what to consider when writing a specification for a proper brick and stone repair and what to look for if work is or is not being carried out in a good and workmanlike manner. The cost is $60 per participant. 4 Learning Units can be self-reported for on-going education.


ARTisAn Objective® Workshop MAS-06

Certified Installer Status Program for Lithomex Level II
Two Days $1000 for Professionals Only
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This is a Certified Installer Training Program which reaches all "Level II Lithomex Surface Repair for Masonry" requirements in order for each repair technician to receive a Validated Training Certificate that acknowledges the technician as a Certified Lithomex Installer for a five year period. The Level II Lithomex Surface Repair for Masonry Workshop is for professional in masonry restoration. Professionals will be exposed to in-depth detailing regarding surface repair to brick and stone. Participants will be taught about the potential causes of brick and stone deterioration and how to properly prepare the installation area, prepare and blend Lithomex and then install the Lithomex to the intended standards of the industry for optimal durability and service life. Stone carving details are taught. Casting Lithomex to create replacement units or for taking up brick and stone loss during masonry conservation campaigns is also discussed. The program ends with a written test and a measured reading on the participant’s installation for square along with photo documentation of the completed work for archival record. The Validated Training Certificate allows the technician to be hired on projects where Lithomex is specified for high quality brick and stone repair as required by the Historic Restoration Architect where installations can only be carried out by a Certified Lithomex Installer.

Architects, Engineers and their firms are invited to observe this workshop on the first day of the two-day workshop and hear supporting information on what to consider when writing a specification for a proper historic brick and stone patching and what to look for if work is or is not being carried out in a good and workmanlike manner. The cost for this special offer is $100 per a qualified architect or engineer. 6 Learning Units can be self-reported for on-going education. Lunch is also included for all who attend workshops that are more than ½ day.


ARTisAn Objective® Workshop MAS-07

The Field School Program to Remove Portland cement stucco off of historic barn stone wall and repoint the stone wall using lime mortar
Each Four Day Set $750
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This is a four-day hands-on workshop (which is repeatable in succession if the work is not completed) is held at a historic site. The historic site will actually have substantial repair work accomplished during the program time. The intent is to instill an attitude toward historic masonry conservation that is respectful of irreplaceable historic fabric and understand how to sympathetically work a repair into and adjacent to the original material. A global mindset toward understanding the building in its environment, the building’s importance, how it was constructed, by who and why it came into existence along with why it and any significant architectural details should be kept in conservation is part of the philosophy discussed during this program. These are questions that every practitioner of historic building repair work should ask before engaging in a repair intervention. The workshop shows end-users how to better decipher the original mortars or plasters used to build the vintage building and spot the inappropriate forms of intervention used to create well-meaning but un-complementary repair work accomplished over the subsequent years from the time of original construction to the current state it is in. The inappropriate repairs may be deemed "inappropriate" based on non-compatible use of materials or simply not be sympathetic to what was the architect and builder's original intent. The intent of the workshop is to get the fix back on track with what is interpreted as the original intended design details. This workshop reviews performing a visual mortar analysis and one using an acid-digestion process of the targeted mortar(s) which is planned to be simulated for reinstallation by repointing. Visual observation of the original sand color and sizes found in the original mortar is reviewed when the mortar sample is sifted and separated into various gradations. Methods to properly prepare the historic masonry walls by cutting and squaring back original mortar joints will be addressed in repointing workshops. To ready walls for repointing, techniques for cutting without irreversibly damaging historic masonry units will be practiced, along with cleaning the masonry in preparation if needed. Placement of new materials and especially the incorporation of reconstituted historic elements in the effort of their reinstallation will be carried out whenever possible. This program is specifically a repointing or a re-plastering workshop but may cover other details. Various details may be listed on the Tentative Calendar Schedule because the historic site or building types may be different. Cost is $750 per participant for four days. A $100 non-refundable deposit per person is required two weeks in advance of coming to the program. The Field School Program is a hands on workshop intended for the participant who wants to get into this line of work professionally or wants to get a better well-rounded understanding of many of the details behind a historic masonry restoration campaign and business. Four Day Sets are $750. This program can be continued upon in four day sets in consecutive weeks based on the participants desire to keep working with us. Work is always on an actual historic building and its interrelated building details. Note to Non-Profit Sites: Underfunded historic sites can use this opportunity to host this workshop. By doing this they can leverage the value of the participants help in reducing the overall cost to complete the needed repair work that can be accomplished during the program because the participants will be guided by our Technical Install Team. Please inquire with your budget and allow us to design a workshop around your budget and preservation needs utilizing this available labor. Architects, Engineers and their firms are invited to observe this workshop on the first day of the four-day workshop and hear supporting information on what to consider when writing a specification for a proper historic brick and stone repointing or plaster refurbishment and what to look for if work is or is not being carried out in a good and workmanlike manner. The cost is $100 per participant. 6 Learning Units can be self-reported for on-going education. Lunch is also included for all who attend workshops that are more than ½ day.


ARTisAn Objective® Workshop BIZ-01

Successful Contracting Practices
Two Days $1000 for Professionals Only
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What you will achieve:
Participants will discuss proposal writing and budgeting project costs. Experience the methods involved in running and operating a successful business.

Course objectives or Goals:

  • Discuss the various aspects of developing and running a business
  • How to estimate and bid for projects successfully


Training Program RRP-01 – Certified Renovator - Initial RRP EPA Lead Safety for Renovation, Repair & Painting (RRP)

Restoring Windows/Doors or Shutters with Lead-Safe RRP Certification
Full Day $200
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What you will achieve:
Participants will gain practice in use of a steam box for preparation and paint stripping of the wood. There will be detailed discussion of the Department of the Interior Preservation Guidelines. Participants will also receive instruction and a certification of completion of the EPA’s Lead-Safe RRP course. If the participant already has the certification, an extra day will be added on to the workshop to gain more experience in the wood restoration aspect at no extra cost.

Course objectives or Goals:

  • Gain certification of the EPA’s Lead-Safe RRP program
  • Discuss different theories behind the various methods of wood window/door restoration
  • Practice using a steam box to prepare the pieces for restoration
  • Explore the different tasks involved in the restoration process
  • Strip and restore a window or door by recreating missing elements and incorporating them into the repair, re-glazing windows all as time allows within the three-day period.


See the Calendar Below for the Current Workshop Schedule


Other Programs planned at the Craftwork Training Center include Community Bake Oven Cooking, Mass-Wall Stonework, Lime Burning, Timber Framing, Slate Roofing, Smithing, Painting, Faux and Fine Art, Stained Glass, Strawbale/Hemp Insulating and much more!


Current Workshop Offerings



List of nearby hotels


Best Western Motor Inn (~9 miles away)

About $109*, 3 Star Hotel
Modest hotel with free WiFi & breakfast

Hampton Inn Quakertown (~12 miles away)

About $107*, 3 Star Hotel
Modern hotel with free WiFi & a pool
Free breakfast

Holiday Inn Lansdale (~9 miles away)

About $96*, 3 Star Hotel
Modern hotel with a gym & free WiFi


*Prices not guaranteed, these numbers are just for a rough approximation

Previous Workshops:

New Paltz, NY - Re-Plastering the Jean [Jacob] Hasbrouck House

Bronx, NY - Galleting in the Garden

Frederick, MD - IPTW 2007 - "Coming Home"

Barre, VT - “Mind the Gap” - Traditional Chinking and Daubing

Trappe, PA - Mentoring Young Masons at the Speakers House

New Orleans, LA - Restore Wesley United - View Photograph

Cameroon, Africa - Building a Lime Test Wall, Part 1

Charleston, SC - 2012 APT/PTN Convergence Workshop at American College of the Building Arts (ACBA)

The following are examples of training work we have done. We have provided training for volunteers of non-profit run historic sites and for contractors as specified by preservation architects for other projects:

Here's an example of an all volunteer workshop lead by Andy deGruchy over a two week period. The group saved the little historic bridge and did it for no cost to the Weisel International Youth Hostel and the Bucks County and Nockamixon Park Systems. deGruchy Masonry, Inc. contacted the Heritage Conservation Organization in Boulder, CO who put the word out and organized the workshop. Andy deGruchy has a philosophy that a workshop for masonry restoration should not be done inside a building where work is practiced only "In theory" and then the work is torn down and material and labor wasted. Instead, Andy believes that using the labor and material to accomplish a needed work for an ailing structure serves many purposed simultaneously. One purpose is to accomplish some needed intervention immediately rather than talking about it and letting the historical object fall down while well-intended plans are being made. Andy was the "fearless leader" and worked along side everyone to coach and encourage all the participants until the final completion. Oddly the work began on a September 11 morning, a poignant date that counters the painful legacy it conjures up by instead having a group of committed people choose to start saving, healing, helping and rebuilding.

Conservation Workshop Details

A small historic country bridge in Bucks County, PA was stabilized with NHL lime/sand/casein grout and then repointed after laying up all the fallen stonework using Pure Natural Hydraulic Lime mortar throughout.

Bridge Before
Bridge After

In 2006 we coached a crew of masons in mixing up St. Astier Natural Hydraulic Lime #3.5 with black slag inclusions to reproduce a similar mixture tooled to an inverted-V style joint on the Burgess Foulke House Museum in Quakertown, PA.

Repointing the Burgess Foulke House
Repointing the Burgess Foulke House
Mortar Joints on the Burgess Foulke House

Previous Portland cement patches held water into the bedding mortar so that after the Portland cement was removed we took moisture meter readings to see that the levels of moisture in the wall dropped prior to repointing. This workshop was done at no additional cost to the Historic Society that owns the building after they awarded the bid to the lowest qualified bidder at a fixed, quoted cost.

Taking Moisture Readings
Repointing the Burgess Foulke House

We demonstrated to local crews the use of St.Astier Lithomex and Natural Hydraulic Limes for applications on the St. John the Divine Church in New York City.

deGruchy Masonry, Inc trained a local crew in Atlanta, GA to use Ecologic™ DGM 50 colored mortar for repointing work at the historic Fox Theater.

Ecologic™ DGM 50 colored mortar was used by another contractor that we trained in the correct application of the mortar to fully repoint the Eldridge Synagogue in Manhattan.

We provided training for another set of contractors who did the repointing work performed at the Ephesus Seventh-Day Adventist Church in Harlem, NY who also utilized Ecologic™ DGM 50 colored mortar and St. Astier Lithomex stone repair material to repair the damaged brownstone on the church.

The National Park Service hired deGruchy Masonry, Inc. to train and inspect work done by a contractor to the new Visitor's Pavillion at Grey Towers, the home of the founder of the National Forest Service. They used St. Astier Natural Hydraulic Lime for interior and exterior plaster and for building stone walls.

Additional Resources:

On-site Training / Guidance Referrals

AIA/CES Accredited Lime Presentation DVD