PJ Materials Consultants Limited:
MASONRY RESTORATION CASE STUDIES
Heritage Structures & Older Buildings
A two-day course which features case studies of restoration projects that utilized practical strategies based on technical concepts.
This course has been developed to provide examples of critical factors that can influence the successful restoration of heritage structures and older buildings. Projects will be visually presented as case studies to highlight key technical and practical aspects. Sometimes the presentations will use an individual project – from the investigation stage through to completion of the restoration – and sometimes a number of abbreviated (mini) case studies will be used to cover specific factors. The projects include institutional, residential and municipal buildings, churches, a masonry memorial tower, museums and more – many of them National Historic Sites. A variety of different types of masonry construction and restoration methods will be illustrated by the case studies.The investigation phases of the projects will include how non-destructive methods can be used to examine hidden conditions and examples will be used to illustrate where understanding the causes of damage and/or deterioration can be critical to the success of a project. The case studies will also provide examples of how the development of restoration strategies specifically addressed identified causes – as well as the results and extent of the mechanisms causing deterioration or damage.The restoration phases of the projects will include many important practical aspects, including how to grout and stabilize traditional rubble masonry, what to consider when repointing heritage brick and stone masonry, how to repair and strengthen cracked masonry, when and how to clean heritage masonry, how to cope with inadequate natural movement accommodation, and much more.
The program is ideally suited for owners, property and facility managers, engineers, architects, consultants, inspectors, investigators, technicians, contractors’ supervisors and foremen, materials suppliers’ sales and technical personnel and trainees. In fact, the course is ideally suited for anyone who wishes to understand the basic requirements for effective and long-lasting restoration of concrete or masonry structures.
In today’s business world, reducing risk and avoiding liability are key factors that should be of great concern to everyone. The topics covered within the program have been designed to facilitate learning from the presenter’s own experiences using actual case studies to highlight key factors that influence the success or failure of restoration projects.
A purpose-designed binder and a USB flash drive containing a full-colour version of the Course Manual – plus comprehensive information, photographs, technical data, articles and bibliography – will be provided to each participant. At any time during the course, participants will be encouraged to ask questions, provide comments, and share their own experiences and problems. The cost for both the binder and USB flash drive are included in the registration fee.
At the end of the second day there will be an Interactive Workshop Session, at which time attendees will be invited to share their own experiences – using case studies if possible. Course
Stabilizing, Repairing & Strengthening Cracked Traditional Masonry ~ Two case studies will be presented to illustrate techniques that may be considered when faced with restoring buildings suffering from severe cracking of masonry components. The causes of the cracking will be evaluated and how this influenced the development of restoration strategies. Below grade waterproofing and the use of core rubble grouting techniques will be presented, together with the installation of retrofit masonry ties and joint reinforcement.Wall Anchoring, Reinforcing & Stabilizing Systems ~ Guest Presenter, Stephen Franks, Blok-Lok Ltd ~ This presentation includes actual projects to evaluate the options and considerations that should be considered when faced with the need for stabilizing and/or strengthening heritage structures and older buildings that have suffered damage caused by overload, differential movement, inner core rubble or collar joint deterioration, missing or corroded wall ties and anchors, etc. Available systems are discussed, together key factors that should be considered.
A Holistic Approach to Conserving Heritage Structures ~ A comprehensive study of how a 100-year old badly damaged art gallery and museum was restored to a durable condition will be presented from investigation to completion. The primary and influencing causes of the damage will be examined, together with some novel techniques that countered what had happened to the building during past restoration and renovation work. The importance of the investigation process and understanding how the masonry assembly can be vulnerable to original design factors will be presented, as well as lessons to be learned when renovation work includes a dramatic change to the gravity load distribution dynamics of a structure.
Cape Race Lighthouse – A History of Restoration ~ Constructed in 1905, Cape Race Lighthouse is believed to be the oldest reinforced concrete lighthouse in North America. Over the decades, it has undergone three major attempts at restoration, each failing to address the cause of the deterioration – with more damage being the result. The history of these attempts is reviewed by the presentation, together with details of the most recent comprehensive and novel restoration project which – hopefully – addressed both the cause and the result.
Considering Structural Aspects & Implications ~ Guest Presenter ~ Gerry Zegerius, Tacoma Engineers ~ Damage, deterioration and defects within the exterior fabric of buildings and structures can often be caused by structural inadequacies. For example, a structural deficiency can sometimes cause cracking which subsequently leads to poor durability. For example, sometimes insidious corrosion of hidden metal components can be contributing to problems that may eventually become more serious. Case studies will be used in this presentation to evaluate some of the concerns that should be considered when faced with the potential poor “structural health” of heritage structures and older buildings.
Condition Assessments Using Drone Technology ~ This presentation examines the use of the latest technology using drones for conditions assessments of heritage structures and buildings. Video footage will be included to highlight where it has been utilised as a replacement for elevated man-lifts. Legal requirements for commercial applications will be discussed, as well as the many do’s-and-don’ts essential to maintain safe flight operations.
A Tale of Two Towers ~ This presentation highlights the award-winning restoration of a National Historic Site in Guelph, Ontario – the Church of Our Lady Phase I – Tower Restoration project. The deterioration mechanisms will be discussed, as well as the condition assessment process. Also examined will be the way in which the investigations assisted in the development of a restoration strategy to address the serious damage that had occurred – despite major restoration work carried out just 15-years before.
A Tale of One Tower! ~ The concluding case study highlights major restoration work recently carried out on the Dingle Memorial Tower in Halifax, Nova Scotia, to address the extensive damage that had occurred to both the interior and exterior of the stone tower. The causes of the damage will be discussed, together with the reasons why the masonry had continued to crack – even after previous restoration work had been carried out some years before. The presentation will also highlight the combination of conventional and novel restoration materials and techniques that were used to restore the tower to a durable condition.
Date & Location: 10th & 11th April 2017; Crowne Plaza Hotel & Conference Centre, Hamilton, Ontario.
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