Parapets are architectural features often seen, but not always understood. If you’ve ever wondered about the purpose of a wall around a roof, bridge, or balcony, you’re likely looking at a parapet. Understanding “What Is A Parapet” and its functions is key to appreciating its role in both safety and aesthetics.
atlantacommercialroofingcontractors.com provides a comprehensive overview, so let’s delve into the essential information about parapet walls, including their various types, reasons for construction, and how they manage roof drainage.
Defining the Parapet Wall
A parapet wall is a low wall that extends above the roofline of a building. Typically found on flat roofs, it’s an extension of the building’s wall, rising vertically from the edge of the roof. Parapets aren’t limited to roofs; they can also be seen on bridges, balconies, walkways, and other elevated surfaces, serving both functional and decorative purposes. In essence, parapets offer a protective barrier while contributing to the building’s overall design. They are particularly crucial when a roof serves a dual purpose, acting as a terrace, balcony, or utility area, maximizing safety for users.
Exploring Different Types of Parapet Walls
Parapet walls can be constructed from a range of materials including brick, reinforced cement concrete, steel, aluminum, and even glass. The specific type of parapet wall depends on the architectural style, functional requirements, and aesthetic considerations of the building. Here’s a look at some common types:
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Plain Parapet Walls: The simplest form, these are vertical extensions of the wall at the roof’s edge. Their primary focus is safety.
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Perforated Parapet Walls: Similar to plain parapets, but with openings or perforations. These enhance the building’s appearance while still providing a barrier. The openings can be of varying sizes and shapes, contributing to the architectural style.
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Embattled Parapet Walls: Reminiscent of castle architecture, these feature alternating high and low sections with strategic openings. Historically used for defense, they’re now sometimes incorporated into modern designs for their unique aesthetic appeal.
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Paneled Parapet Walls: These are similar to plain parapets but are decorated with panel designs on the exterior face.
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Sloped Parapet Wall: Designed for sloped roofs, often found on industrial or trussed structures.
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Stepped Parapet Wall: Another type used with inclined roofing systems, featuring a staircase-like design.
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Flat Parapet Wall: Specifically recommended for flat roof structures.
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Arched Parapet Wall: These feature curved or arched designs and can be used with both flat and inclined roofs.
Why Build a Parapet Wall? Understanding the Purposes
Parapet walls serve a variety of important functions:
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Debris Prevention: They help to prevent dust, leaves, and other debris from accumulating on the roof or entering HVAC systems.
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Fall Protection: Parapets act as a safety barrier, preventing debris or even equipment from falling off the roof.
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Wind Resistance: They reduce the impact of high winds on the roofing system, preventing potential damage.
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Aesthetic Enhancement: Parapet walls can significantly improve a building’s appearance and curb appeal.
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Safety on Rooftops: Tall enough parapets provide a secure barrier for individuals accessing the roof for maintenance, inspections, or equipment servicing. They also provide safety on bridges, preventing vehicles from veering off course.
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Equipment Concealment: Parapet walls can hide unsightly equipment or machinery located on the roof, maintaining the building’s visual appeal.
Note: Parapet walls are most often included in the original design of a building.
Parapet Wall Drainage: How It Works
Effective drainage is essential for any roofing system, and parapet walls are no exception. Scuppers are a common solution.
- Scuppers: These are rectangular outlets strategically placed in the parapet wall at the roof’s edge. They act as drainage points, allowing water to flow freely off the roof. Scuppers are commonly used on flat roofs, providing an efficient drainage method.
Note: Scuppers are often paired with gutters and downspouts to direct water away from the building’s foundation.
Understanding Parapets: A Summary
This article addressed “what is a parapet,” explored different parapet wall types, and highlighted their protective and aesthetic functions. Understanding the role of a parapet wall in protecting both the roofing system and people is crucial for appreciating its construction and maintenance requirements.
Neglecting the proper installation or maintenance of parapet walls can lead to significant hazards, including increased risk of falls, storm damage, and ineffective water drainage.
Sources:
cdc.gov/niosh/docs/2014-108/pdfs/2014-108.pdf
osha.asu.edu/Resources/Documents/NIOSH2014-108.pdf
ehss.vt.edu/programs/FAL_general.php
copper.org/applications/architecture/arch_dhb/arch-details/gutters_downspouts/scuppers.html
Atlanta Commercial Roofing Contractors
Atlanta, GA (404) 220-9288
