Learn About Permeable Paving


Paving involves more than bricks alone. We want to help you to buy or specify a paving installation that will last for 50 years. The intention of this section of the website is not to sell our products. Even if you decide to buy from another supplier, use this section to understand paving and the concepts around it. In this section we will refer to various international guidelines and other factual information. Yes, when it comes to the concepts around segmented paving, South Africa is not different to the rest of the world, irrespective of what the installer claims who has been doing it for 30 years. Also beware, even though segmented paving has proven itself since Roman times, things could go horribly wrong. We will try to objectively share common problems encountered with concrete and segmented paving and how to avoid them.   

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Permeable paving consists of solid concrete paving units with joints that create openings in the paved surface when assembled into a pattern. The joints are filled with small stones that allow water to freely enter the surface. The paving units are placed on a bedding layer of small stones that rests over a base and subbase of larger single sized stones. The concrete pavers, bedding and base layers are typically restrained by concrete kerbs. The base and subbase store water and allow it to infiltrate into the soil subgrade underneath the system. Perforated underdrains in the base or subbase could be used to harvest water. Separation geotextiles are often used to separate layers or prevent fines to enter the system from adjacent soils.

There is a growing choice of concrete blocks and flags available from a vast number of manufacturers, designed specifically for permeable paving.

Click below to view permeable paving design guidelines

Bosun Installation Guidelines

Interpave Design & Construction of Concrete Block Pavements

Like all stormwater control measures, permeable paving requires maintenance as it traps sediment on its surface. Larger particles are initially trapped while allowing water to pass.

Click below to view maintenance guidelines

ICPI Maintenance Guide for Permeable Interlocking Concrete Pavements