Historic Masonry Preservation Certificate Program (HMPC)

As the list of historic buildings and structures increases, so does the demand for qualified masons who have the necessary skill and knowledge to preserve them. Traditional craft skills and contemporary repair techniques are critical to the preservation of historic buildings and structures. To assure understanding and compliance related to masonry restoration and historic preservation, IMI and the International Masonry Training Education Foundation (IMTEF) offers the HMPC. The program gives members of the International Union of Bricklayers and Allied Craftworkers (BAC) integrated knowledge in historic masonry preservation.


For Building Owners and Design Professionals

  • Manage quality control on preservation projects
  • Take advantage of the opportunity to present project-specific information to the craftworkers on your project
  • Ensure quality craftsmanship by including HMPC as a pre-qualification in project
    specification language. See sample specification language below.

For BAC Craftworkers

  • Increase your work opportunities with a recognized credential included in project specifications
  • Establish your expertise as a preservationist by learning traditional and contemporary techniques from renowned practitioners

HMPC is a 50-hour program covering the role  of craftworkers in the overall execution of a preservation project, including the theory and history behind the preservation movement and an in-depth understanding of traditional materials/methods and advancements in preservation technology. The learning modules actively engage masonry craftworkers – many of whom have already been involved in high-level restoration work – through lecture and hands-on training sessions lead by experienced IMI and IMTEF instructors. The course also draws heavily on assistance and participation from building owners, members of the preservation design community, and product manufacturers.

restoration worker repairing stone on Canon Hill in Washington, DC
Core Modules

Fundamentals of Historic Preservation

This module discusses the history of the preservation movement as well as current trends in the field of preservation. Participants gain an in-depth understanding on the 4 major treatment approaches: Preservation, Rehabilitation, Restoration, and Reconstruction.

Introduction to Masonry Building Materials/Technology/Deterioration

This module covers the evolution of the construction process, including the timeline of building technology and its impact on the American way of building. Participants receive an overview of basic architectural vocabulary and examine the properties of building materials and the mechanism of deterioration. Other topics include diagnostic methods, including examining and evaluating historic fabric, and sustainability issues. Upon completion participants have a better understanding of the building as a system.

Historic Structure Survey and Condition Reports

This module introduces the types of research, survey, and testing that takes place before physical restoration work begins. The module follows the work of the architect, engineer, and conservator and explains the role each plays in understanding the deterioration phenomenon and selecting repair methods and materials.

Traditional and Contemporary Repair Methods

This module provides an overview of both traditional repair methods and materials as well as contemporary and cutting-edge approaches. Specialized materials to be used in the hands-on portion of the program are also discussed.

Mortars in Preservation

This module covers the development and use of masonry mortars in the U.S. Participants gain an in-depth understanding of lime-based mortars, natural cements, use
of pozzolans, and hydraulic-based mortars. Lectures focus on the chemistry behind mortars and their appropriateness depending on masonry types, masonry quality, and location. A hands-on portion gives participants the opportunity to prepare and install lime-based mortars and practice several mortar extraction methods.

Elective Modules
  • Brick Restoration
  • Terra Cotta Restoration
  • Stone Carving and Dutchman Repair
  • Concrete Repair
  • Historic Mortars: Materials, Removal and Pointing Techniques
  • Masonry Cleaning
  • Mold Making and Casting
  • Caulking and Sealants
  • Consolidants and Coatings
  • Pinning and Grout Injection
Sample Specification Language

Design professionals can insert the following pre-qualification language into specifications to help ensure HMPC-trained craftworkers employed by BAC signatory contractors are placed on their project to perform sensitive restoration work.

Option 1:
“Superintendent and foreman for work in this section assigned to this project shall each have a minimum of ten (10) years’ experience with this type of repair work an International Masonry Institute Historic Masonry Preservation Certificate (or equal) and to provide evidence of certification prior to the start of the project. References of projects they have completed shall be submitted to the Architect by the successful bidder. The project superintendent and foreman assigned to this project shall not be changed throughout the duration of the work without written request to and consent of the Architect.”

Option 2:
“All team members of the Masonry Contractor Bidder will be required to have an International Masonry Institute Historic Masonry Preservation Certificate (or equal) and to provide evidence of prior certification or a statement of the firm’s commitment to enroll in and initiate a training program relevant to the scope of work prior to the start of the project.”

HMPC demonstration on stone patching and repair
Program Availability

HMPC is offered in the following locations:

  • The BAC/IMI John J. Flynn International Training Center outside Washington, DC
  • Regional BAC training centers
  • Job sites for site-specific training on an as-needed basis

BAC members should contact their local training center or coordinator to inquire about program availability. BAC Local Officers and Training Coordinators can contact Serenia Holland, IMTEF Training Coordinator, to enroll members or to get additional information about program availability at the International Training Center: sholland@imtef.org, (301)-291-2105.

To find out about upcoming HMPC classes at the BAC/IMI International Training Center, see the International Masonry Training and Education Foundation’s training calendar.

Download our HMPC guide or get in touch for more information on the program.