How to Install a Permeable Paving System
Please refer to the following sources of information - BS 7533-3:2005 Pavements constructed with clay, natural stone or concrete pavers. Part 3: Code of practice for laying precast concrete paving blocks and clay pavers for flexible pavements.
Sub-Base: 4/20mm aggregate
After putting the required depth of stone in position, it needs to be re-orientated using either a tamdem roller or a plate vibrator.
Bedding Layer: 6.3-2mm laying course material
The bedding layer should be screeded over the 4/20mm.
Paving Blocks
When the blocks are placed to the chosen pattern they should be plate vibrated, before the 6.3-2mm grit is brushed into the joints until they are completely filled.
Joint Filling
All joints must be filled to the top with 6.3-2mm grit. Joints,which are not fully filled can lead to possible movement of the blocks after use. We recommend that after a few weeks use that any joints, which have settled and are not full, are topped up with grit. Joints should be kept filled at all times. You will need approximately 1 ton of grit for every 100m2 of 80mm paving.
Note
Care should be taken that the permeable joints do not become contaminated as work on the scheme is completed. Special care needs to be taken when soft landscaping is carried out so that soil does not enter the joints.
Adverse Weather
Due to the superior drainage capabilities of Hydropave it is possible to install the product in more adverse weather conditions compared to standard paving.