Wind uplift

The Challenge

Roof terraces are often installed on an existing flat roof, where vents, drains and other features prevent an uninterrupted, flush-fitted terrace. To achieve this, the terrace will be raised above the roof on a supporting structure, which creates a pocket of air under the terrace surface.

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In windy conditions, the flat, unobstructed surface of the terrace will act like the top of an aircraft wing and exert upward force on the terrace.

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To enable access to the roof layer for maintenance and repair, the decking or tiles used for the terrace are often loose-fitted into a framework so they can be easily removed. But this means they are vulnerable to uplift in windy weather.

The Solution

The Raaft® terrace system mitigates localised weight loading by using a framework of loadbearing joists and support pedestals.

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Our modular extruded aluminium system uses interlocking joists and bracing struts to create a strong yet lightweight platform.

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Height-adjustable pedestals support, stabilise and level the platform to ensure the weight is evenly distributed for maximum support.

Prevent waterlogging - Rainwater retention in planter soil will considerably add to the overall weight of the system. Placed under planters, Raaft® floor structure panels are perforated to allow easy drainage that prevents waterlogging.
Lightweight materials - The choice of decking material can also significantly change the weight loading of your roof terrace. Raaft® porcelain decking and tiles compare favourably with the durability of wood and composite decking and the weight of natural stone and concrete products.
Structural assistance - With data provided by your project’s assigned structural engineer, we can help you calculate safe weight loading and distribution across your terrace.

Prevent Wind Uplift on Roof Terraces

The Challenge

The Solution

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