Suregreen PP40 has been intentionally designed to be a universal and versatile paver that can be successfully used in many applications. Commonly it is used for domestic driveways, overflow car parks, access roads, pedestrian walkways and emergency and disabled routes.
The PP40 paver is a 40mm deep permeable grid that is available in black or green and can be filled with either a gravel or grass whilst still maintain a reinforcing, free draining surface.
This is a robust paver that can meet the challenging demands that many applications will impose on the paver. Designed with hexagonal shaped cells, one of the strongest shapes in nature, the paver can resist the turning movements of regular traffic. The paver has integral spikes on the underside of the mould to help counteract the downward forces produced by the movement and motion of traffic. It also means that during installation no pegging is required which will save time and reduce expenditure.
The paver has an expected lifetime of 20 years and is designed for use all year round, particularly on driveways and overflow carparks. In certain circumstances, the paver can be strong enough for infrequent use by HGV vehicles, this is depending on several factors, and we ask that you seek out advice before using it for such an application.
Suregreen PP40 has been tested to a weight of 350 tonnes per m2. The paver has also been manufactured to withstand both high and low temperatures and expansion demands the UK climate can inflict.
All Suregreen pavers are suitable to be the working top layer of a fully permeable SuDS compliant construction profile. Moulded from a UV stabilised specifically carefully chosen mixture of recycled plastics that are durable and long lasting.
Suregreen PP40 is suitable to be used as part of SuDS - the latest government guidelines regarding flood prevention. The grid will allow full permeability and so not create any water runoff, reducing the overall costs, as generally no additional drainage is needed, because the water is allowed to naturally permeate away. – line moved and improved
Suregreen PP40 permeable grid has been exhaustively tested to UNI CEI EN ISO/IEC 17025 certification in regards to load bearing and to 20 tonne wheel load SWL - DIN 1072 & UNI CEI EN ISO/IEC 17025 certification. Please see the full specification sheet in our technical segment.
For full detail on the construction aspects please refer to the complete technical design guidelines within the technical area on the website click the button below.
View Technical Design GuidelinesPP40 permeable paving grids are interlocking plastic grids used for ground reinforcement. These trafficking applications include car parking, paths, walkways and fire access lanes. PP40 paving grids provide a stable, reinforced, permeable load-bearing surface.
Key Information:
Dimensions: 500mm x 500mm x 40mm with additional 25mm spikes on the base
Weight: 1kg per individual piece (4kg per m²)
Internal cell dimensions: 57mm hexagonal
Case reinforcement/anti-shear: Four 25mm ground spikes
Connection method: Edge clips
Cell wall thickness: 3mm (+/- 2%)
Cell openness %: 95% on top and 75% on the base
Polymer: Recycled polyethylene
Colour: Black or green
UV-stabilised: Yes
Load-bearing capacity (filled): 350 tonnes per m², tested to UNI CEI EN ISO/ IEC 17025 Certification
Product control: Tested to ISO 9000
Traffic loading: Tested to DIN 1072 (20-tonne wheel load SWL)
Pavers per m²: Four
All data figures are nominal and are given in good faith. Suregreen Limited reserve the right to amend any data without prior notice. Product variances are provided as a guide and normal production and product characteristics are within these parameters.
Installation stepsPrior to any work on site, it is highly advisable that a site survey – even if only a rudimentary one – is completed. Ask questions such as:• Will the site drain naturally?• What slopes - if any - need to be allowed for?• What type of surface conditions and what type of soils are on site?• Is the type of soil on the surface the same 200 - 400mm under the surface (will draining water be trapped on a non-porous layer?)
You will also need to consider an edge retention system or kerb of some form, as this is required by PP40 permeable pavers. There are four basic layers to any construction profile:1) The sub-grade
The sub-grade is at the bottom of the profile. This is the layer after removal of the existing soils. The sub-grade could be as little as 100mm or as much as 500mm below the existing surface. It is advisable that the sub-grade is compacted (by roller or similar method) and an even working surface created.
2) The sub-baseOn top of the sub-grade, a sub-base layer needs to be installed. This sub-base layer needs to be stable and porous. The sub-base ideally needs to be composed of a free-draining, sharp angular fill material (angular stone or aggregate), 95% of which the particle size is of a mixed nature between 5mm to 45mm (MOT type3 or similar) with reduced fine content which would produce a stable and porous sub-base/hard-core after compaction.
Ideally a geotextile layer needs to be installed at the bottom and the top of the sub-base. The geotextile will stabilise the sub-base by separating/filtering, and this will limit fine material migration into the sub-base while still being permeable and allowing water to infiltrate. On top of the bottom layer of geotextile, a 20KN geogrid can be applied if desired. 3) The bedding layerFor a gravel finish, the bedding layer needs to be a free-draining, sharp angular 5 - 20mm gravel laid to a depth of approximately 40mm on top of the top layer of geotextile which has been installed above the sub-base. This bedding layer may require compaction using a vibrator plate or roller. The bedding layer must be smooth and level to allow an even surface for PP40 porous pavers to be laid onto.4) Laying Suregreen PP40The PP40 permeable pavers should be laid as level as possible onto the prepared gravel bedding layer, working from one corner and lying adjacent paving grids into their connectors. PP40 can be cut on-site using a handsaw, jig-saw or other mechanical saws to match site/client requirements, shapes and obstacles.5) Filling the paverPP40 then needs then to be filled with the same 5 - 20mm sharp angular gravel. With the spikes and the shearing action of the gravel, PP40 becomes locked within the gravel which enables it to resist the dynamic loadings imposed by the surface traffic. A light whacker plate after filling may be applied to settle the gravel, and then a small top up to refill the cells may be necessary. For cosmetic appearance, some clients may wish to overdress slightly with gravel.Notes on Gravel:Experience has shown a 5mm - 20mm sharp angular gravel gives the best results for providing a long-term, very low-maintenance wearing surface. The gravel interlocks/shears with itself and, more importantly, with the specially designed PP40 pavers.
Single size gravel - or worse, rounded gravel such as pea shingle - will lead to issues and failure. The more rounded and single size the gravel is, the faster problems are likely to happen.
To see our complete install guide please click here
Installation Guide | PP40
Installation steps
Prior to any work on site, it is highly advisable that a site survey, even if only a rudimentary one, is completed.
Ask questions such as:
• Will the site drain naturally?
• What slopes - if any - need to be allowed for?
• What type of surface conditions and what type of soils are on site?
• Is the type of soil on the surface the same 200 - 400mm under the surface (will draining water be trapped on a non-porous layer?)
You will also need to consider an edge retention system or kerb of some form, as this is required on a PP40 permeable paver applicable.
There are four basic layers to any construction profile:
1) The sub-grade: The sub-grade is at the bottom of the profile. This is the layer after removal of the existing soils. The sub-grade could be as little as 100mm or as much as 500mm below the existing surface. It is advisable that the sub-grade is compacted (by roller or similar method) to create an even working surface.
2) The sub-base: On top of the sub-grade, a sub-base layer needs to be installed. This sub-base layer needs to be stable and porous. The sub-base ideally needs to be composed of a free-draining, sharp, angular fill material (angular stone or aggregate), 95% of which the particle size is of a mixed nature between 5mm to 45mm (MOT type3 or similar) with a reduced fine content which would produce a stable and porous sub-base/hard-core after compaction.
Ideally a geotextile layer needs to be installed at the bottom and the top of the sub-base. The geotextile will stabilise the sub-base by separating / filtering, and this will limit fine material migration into the sub-base whilst still being permeable and allowing water to infiltrate. On top of the bottom layer of geotextile, a 20KN geogrid can be applied if desired
3) The bedding layer: For a gravel finish, the bedding layer needs to be a free-draining, sharp and angular, mixed size stone ranging in size between 5 - 20mm laid to a depth of approximately 40mm on top of the upper layer of geotextile which has been installed above the sub-base. This bedding layer may require compaction using a vibrator plate or roller. The bedding layer must be smooth and level to allow an even surface for PP40 porous pavers to be laid onto
4) Laying Suregreen PP40: The PP40 permeable pavers should be laid as level as possible onto the prepared gravel bedding layer, working from one corner, and lying adjacent paving grids into their connectors. PP40 can be cut on-site using a handsaw, jig-saw, or other types of mechanical saw to match site/client requirements, shapes and obstacles.
5) Filling the paver: The PP40 paving grids then need to be filled with the same gravel as the bedding layer, and testing has found that using a sharp and angular, mixed size stone, ranging in size between 5 - 20mm gives the best results. With the integral spikes and the shearing action of the gravel, PP40 is able to resist the dynamic loadings imposed by the surface traffic. A light whacker plate after filling may be applied to settle the gravel, and then a small top up to refill the cells may be necessary. For cosmetic appearance, some clients may wish to overdress slightly with gravel.
Notes on Gravel: Experience has shown a 5mm - 20mm sharp angular gravel gives the best results for providing a long-term, very low-maintenance wearing surface. The gravel interlocks/shears with itself and, more importantly, with the specially designed PP40 pavers.
Single size gravel - or worse, rounded gravel such as pea shingle - will lead to issues and failure. The more rounded and single size the gravel is, the less interlocking will take place within the cells, causing movement within the stone surface.
CAD Drawing of PP40 Permeable Paver with Gravel Infill - Please click this link to open the pdf.
CAD Drawing of PP40 Permeable Paver with Grass Infill - Please click this link to open the pdf.
PP40 Car Park and Caravan Park Case Studies: County Meadow Caravan Park - Click here to visit the case studyTamworth Car Park - Click here to visit the case studyYorkshire Overflow Car Park - Click here to visit the case studyEssex Car Park - Click here to visit the case study
Trowell Garden Centre - Click here to visit the case study
PP40 Driveway Case Studies:
Redborn driveway renovation - Click here to visit the case studyWarwick Courtyard & Driveway - Click here to visit the case studyPP40 Access Route Case Studies: Royal Tunbridge wells Access Route - Click here to visit the case studySurrey Ambulance Route - Click here to visit the case studyHertford Fire Access Route - Click here to visit the case studyGreater Manchester Emergency Access Route - Click here to visit the case study
For specification or trade enquiries, please contact our technical team on 01376 503869 or trade@sure-green.com for advice, project quotes, product and specification advice, technical information, design and installation guidance and CPD seminars.
