This video demonstrates how Marshalls Priora permeable paving deals with large volumes of water. As you can see, the 3 tonne dumper used in this video provided a deluge far heavier than any rainfall event we’d ever expect in the UK!
Permeable paving is a SuDS (Sustainable Drainage) technique which helps to reduce the risk of flooding and also improves the quality of surface water runoff. SuDS is a design philosophy created to deal with the growing threat of flooding, which is exacerbated by increased urban development. Normal hard surfacing prevents rainwater from soaking into the ground where it falls, so instead flows in high volumes and at high speeds into sewers and waterways, which weren’t designed to cope with this demand. When the traditional drainage systems are overburdened, flash floods occur.
Permeable paving provides attractive, load bearing hard standing which collects water where it falls. The water is safely stored in the sub-base until it can either soak into the ground or be released at a controlled rate, reducing the risk of flash flooding downstream. Best of all - independent tests (and our 15 years of market-leading experience) has proved that in normal use, permeable paving requires no regular maintenance to ensure it keeps working! Even if the joints between the blocks look as though they’re clogged up, they’re wide enough to ensure that water can flow down into the sub-base.
This particular site was a busy Portakabin depot, which is regularly trafficked by cranes with a laden weight of over 150 tonnes as well as the usual cars and vans you’d expect on a commercial site. At the time this video was filmed, the Priora paving had been installed for over 4.5 years - and was still working absolutely perfectly, as you can see.
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