Marshalls now have an even bigger and better range of ‘Permeable Block Paving’ (The ‘Priora’ range). This is a permeable paving solution for use in Sustainable Drainage Sytems (SuDS) and schemes which allows water to quickly drain into the sub-base then slowly into the ground, therefore reducing the ‘run off’ and the amount of potential local flooding.
‘Priora’ block paving does not need planning permission!
These blocks are available in most of the non-permeable equivalent range of products – Drivesett Argent & Tegula as well as Driveline.
These blocks have a nib on the edge of the block which interlock to enhance the surface stability but creates voids which surface water easily runs through to a specially prepared sub-base.
This system allows a slow release of surface water back into the environment by a process known as attenuation. Modern drains and sewers by-pass this natural process, denying the ground the opportunity to soak up much of that water. Permeable paving and SuDS redresses the balance, allowing the ground to naturally absorb, store and gradually release the collected water in a controlled manner – much like a huge soakaway.
Geotextile is a permeable fabric which is laid to seperate the sub-base from the ground which allows the surface water to filter through without the loss of sub-base into the ground, it also acts as a weed barrier and can increase the load bearing & lifespan of the surface.