The Role of Masonry in Preserving Niagara’s Oldest Houses: A Case Study of McFarland House

Nestled in the heart of Niagara-on-the-Lake, Ontario, stands a testament to the enduring power of expert masonry and preservation techniques. The McFarland House, one of the oldest surviving structures in the region, has weathered over two centuries of history, thanks in large part to the skilled hands of masons both past and present. In this comprehensive exploration, we’ll delve into the fascinating story of this historic home and examine how traditional and modern masonry methods have played a crucial role in its longevity.

The Rich History and Significance of McFarland House

Built in 1800, the McFarland House holds a special place in Niagara’s architectural heritage. John McFarland, a Scottish immigrant and successful farmer, constructed this Georgian-style home as a symbol of his prosperity and to house his growing family. The house witnessed pivotal moments in Canadian history, including the War of 1812, during which it served as a hospital for both British and American soldiers.

Key historical highlights of McFarland House include:

• One of the few buildings to survive the burning of Newark (now Niagara-on-the-Lake) in 1813
• Continuous occupation by the McFarland family for over 150 years
• Designation as a National Historic Site of Canada in 1955
• Restoration and opening to the public as a museum in 1959

The house’s longevity and historical significance make it an ideal case study for examining the role of masonry in preserving our architectural heritage.

Original Masonry Techniques Used in Construction

The McFarland House’s remarkable durability can be attributed in large part to the quality of its original construction. The masons who built this home employed techniques that were both time-tested and innovative for their era.

Solid Brick Construction

Unlike many modern homes that use brick as a veneer, the McFarland House features solid brick walls. These walls, typically two or three bricks thick, provided excellent insulation and structural integrity. The bricks themselves were likely made locally, using clay from the Niagara region, and fired in nearby kilns.

Lime Mortar

The original masons used lime mortar to bind the bricks together. This type of mortar, made from limestone, sand, and water, had several advantages:

• Flexibility: Lime mortar can absorb minor structural movements without cracking
• Breathability: It allows moisture to evaporate, preventing trapped water from damaging the bricks
• Self-healing properties: Lime mortar can reform bonds after minor cracking

Flemish Bond Pattern

The bricks in the McFarland House were laid in a Flemish bond pattern, alternating headers (short ends) and stretchers (long sides) in each course. This pattern not only created an attractive appearance but also increased the wall’s structural strength.

Challenges in Maintaining Historic Masonry Structures

While the original construction of the McFarland House was robust, maintaining any historic masonry structure presents unique challenges. Over the past two centuries, the house has faced numerous threats to its integrity:

Weather Exposure

Niagara’s climate, with its freeze-thaw cycles and occasional severe storms, can be harsh on masonry. Moisture infiltration and temperature fluctuations can lead to spalling, cracking, and mortar degradation.

Structural Movements

Natural settling of the foundation and subtle shifts in the building over time can stress the masonry, potentially causing cracks or misalignments.

Previous Repairs

Well-intentioned but misguided repair attempts in the past, particularly those using modern cement-based mortars, have sometimes caused more harm than good. These harder mortars can trap moisture and cause accelerated brick deterioration.

Modern Environmental Factors

Increased pollution, vibrations from nearby traffic, and changes in groundwater levels all pose new threats that the original builders never anticipated.

Modern Preservation Methods Employed by Masonry Experts

To address these challenges and ensure the McFarland House continues to stand for generations to come, masonry experts have employed a range of modern preservation techniques:

Material Analysis and Matching

Before any restoration work begins, experts analyze the original materials to ensure any replacements or repairs closely match the historic fabric. This includes:

• Brick composition and firing temperature analysis
• Mortar chemical and physical property testing
• Color matching for both bricks and mortar

Repointing with Compatible Mortars

One of the most critical preservation tasks is repointing deteriorated mortar joints. Modern masons working on the McFarland House use lime-based mortars that closely match the original in composition, strength, and porosity. This ensures compatibility with the historic bricks and maintains the wall’s ability to “breathe.”

Brick Replacement and Repair

When individual bricks are too damaged to salvage, they are carefully replaced with matching units. In some cases, specialized repair mortars are used to rebuild partially damaged bricks, preserving as much original material as possible.

Non-Destructive Evaluation Techniques

Modern technology allows preservationists to assess the condition of masonry without causing damage. Methods employed at the McFarland House include:

• Infrared thermography to detect hidden moisture issues
• Ground-penetrating radar to examine wall cavities and foundations
• Ultrasonic pulse velocity testing to evaluate brick and mortar strength

Protective Treatments

To guard against future damage, conservators have applied carefully selected treatments to the McFarland House masonry:

• Water-repellent coatings that still allow vapor transmission
• Consolidants to strengthen deteriorating stone elements
• Sacrificial lime washes to protect vulnerable surfaces

Lessons for Homeowners in Historic Neighborhoods

The preservation of the McFarland House offers valuable insights for owners of historic homes in Niagara and beyond:

Understand Your Home’s Construction

Research the original building techniques and materials used in your home. This knowledge is crucial for making informed decisions about maintenance and repairs.

Regular Inspections are Key

Implement a routine inspection schedule to catch potential issues early. Pay special attention to areas prone to water infiltration, such as chimneys, parapets, and around windows.

Choose Appropriate Materials

When repairs are necessary, use materials compatible with your home’s original construction. For most historic brick homes, this means lime-based mortars rather than modern cement.

Work with Experienced Professionals

Seek out masons and conservators with specific experience in historic preservation. Their specialized knowledge can make the difference between a repair that lasts for decades and one that causes long-term damage.

Embrace Preventative Maintenance

Address small issues promptly to prevent them from becoming major problems. Simple tasks like keeping gutters clean and vegetation away from walls can significantly extend the life of your masonry.

Respect the Building’s History

While modernizing for comfort and efficiency is often necessary, strive to maintain the historic character of your home. Consider reversible alterations that don’t permanently impact the original structure.

Conclusion: The Enduring Legacy of Quality Masonry

The McFarland House stands as a shining example of how skilled masonry, both in original construction and ongoing preservation, can ensure the longevity of our architectural heritage. By combining traditional techniques with modern conservation methods, we can protect these irreplaceable structures for future generations to appreciate and learn from.

For homeowners in Niagara’s historic neighborhoods, the lessons learned from the McFarland House are invaluable. By understanding the unique needs of older masonry structures and employing appropriate maintenance and repair techniques, you can play a crucial role in preserving the rich architectural tapestry of our region.

Remember, when it comes to maintaining historic masonry, expertise matters. If you’re facing challenges with your own historic brick home, don’t hesitate to reach out to experienced professionals who understand the delicate balance between preservation and modernization. Together, we can ensure that Niagara’s architectural gems continue to tell their stories for centuries to come.