Understanding Parapet Walls
Parapet walls are a common architectural feature in North London, particularly in areas like Crouch End, Finsbury Park, and Highgate.
These low walls extend above the roofline and are typically found on Victorian and Edwardian properties. While they add a decorative touch to buildings, their primary purpose is functional: to protect the roof edges, provide safety, and divert rainwater away from the property.
Typical Materials Used in Parapet Walls
Parapet walls in North London are often constructed using traditional materials such as brickwork, stone, or concrete, reflecting the architectural style of the period. These materials are usually paired with protective elements like:
Lead Flashings: To seal the junctions between the wall and roof, preventing water ingress.
Coping Stones: To cap the top of the parapet and protect the masonry from weathering.
Render and Plaster: Occasionally used to create a smooth, weather-resistant surface.
Modern parapet walls may incorporate materials like fiberglass or advanced waterproof membranes, offering improved durability and resistance to weathering.
Common Defects in Parapet Walls
Parapet walls are exposed to the elements, making them prone to various defects:
Water Penetration: Poorly maintained flashings or coping stones can allow water to seep into the wall, leading to damp issues and structural weakening.
Cracks in Masonry: Movement in the building, frost action, or thermal expansion can cause cracking, allowing moisture to penetrate further.
Spalling Bricks or Stone: Prolonged exposure to moisture can cause the surface of the masonry to flake or crumble.
Failed Flashings: Damaged or improperly installed flashings can lead to leaks and water pooling at the base of the parapet.
What to Look Out For
When inspecting parapet walls, look for signs of dampness, missing or damaged flashings, cracks in the masonry, and vegetation growth, which often indicates trapped moisture. These issues can escalate if not addressed promptly, impacting both the structural integrity and appearance of the property.
Parapet Walls in Surveys
Since parapet walls are usually inspected from ground level as part of a Homebuyer or Building Survey, potential defects might require closer investigation. If you own or are considering purchasing a property with parapet walls, it’s essential to address these issues early to avoid costly repairs.
To book your Level 2 Homebuyer Survey or Level 3 Building Survey, contact us at Tollington Surveyors. With our in-depth knowledge of North London properties, we’ll provide you with expert insights and a clear understanding of your property’s condition.
Tollington Surveyors is a small, locally-focused surveying company based in Stroud Green, and dedicated to serving the Haringey area. Learn more >
