Category: Design
Prepared by Eng. Ahmed Fathy, Projects Manager ·
Definition
A parapet is a low wall at the edge of a roof or terrace that prevents falls, hides rooftop equipment and finishes the facade. On accessible roofs it is usually about 1.1 m high or as the code's fall protection requires, and the Saudi Architecture guidelines set its form in some styles.
Why it matters on a project
It is part of the facade and skyline, and a sensitive waterproofing point because the membrane turns up it. A cracked top lets water into the wall.
Measurement and pricing
Blockwork or concrete in square or cubic metres, coping in linear metres, and the waterproofing upturn within the roof waterproofing.
Common mistake
Leaving the parapet top without a sloped coping or drip, so water seeps in and stains the facade.
Frequently asked questions
How does a parapet differ from roof screens?
The parapet is the edge wall; screens rise higher for privacy from neighbours per municipal rules.
How do I stop water getting in through the parapet?
Turn the waterproofing up it with a fillet at the base, and fit a coping sloping inward with a drip.
Related terms
- Bitumen membraneModified bitumen waterproofing rolls bonded by torch.
- BlockworkBuilding walls with solid, hollow or insulated concrete blocks.
- Elevation (facade)A drawing of the building’s external face showing openings, materials and heights.
- Roof annexRooms built on the top floor's roof within a set ratio.
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