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Suregreen Paver
Installation With Gravel

Suregreen gravel pavers installation

Suregreen pavers are permeable plastic pavers providing a solution to a wide range of traffic needs where a gravel or angular stone free draining surface is required.

The finished surface would be suitable for pedestrian, bicycle, car, van, truck and lorry traffic. This makes the ideal for a wide range of applications such as a car park, an emergency access route or wheelchair / disabled access path.

The design of these pavers makes them a practical solution for a wide range of end requirements and site conditions. They are manufactured using carefully selected plastics to meet the demands and loadings of most weights of vehicle that may use them. When installed correctly the lifespan could be 20 years or more.

Installation Steps

Prior to any work on site, it is highly advisable to carry out a site survey. This will address questions such as: will the site drain naturally, if any slopes need to be allowed for, what type of surface conditions and what type of soils are on site. It may also be prudent to check if the type of soil on the surface is the same 200 to 400mm under the surface as this may have an impact on water drainage.

Other considerations include whether a kerb or edge retention system is needed. This could be anything from treated timber to metal support strips or concrete road kerbs.

There are four basic layers to the ground 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 to the required depth which has been calculated based on the type and frequency of traffic using the installation and the ability of the existing soils to handle imposed loadings. The sub-grade could finish up be as little as 100mm or as much as 500mm below the existing surface. It is advisable that the sub-grade is compacted, either by roller or other method to create an even working surface.

2) The sub-base layer

On top of the sub-grade a sub-base layer needs to be installed. The depth of this layer would have been pre-determined at the design stage. This sub-base layer needs to be stable and porous and ideally should be composed of a free draining sharp angular fill material 95% of which the particle size is of a mixed nature between 5mm to 45mm (DOT type3 or similar) with reduced fine content which would produce a stable and porous sub-base / hard-core after compaction. MOT type 1 / crushed concrete would be generally unsuitable because of the high fine content and so having minimal porosity and permeability. The sub-base needs to be compacted to the required depth. At the bottom and the top of the sub-base a geotextile separation layer needs to be installed. The geotextile will stabilise the sub-base by separating and filtering thus limiting fine material migration into the sub-base while being permeable to allow water to infiltrate. The fine materials, if allowed in, would cause eventual deformation or dipping of the top surface as well as drainage issues.

On top of the bottom layer of geotextile a 30KN geogrid can be applied to reduce the depth of sub-base used and also reduce the amount of spill caused by works. Not all sites will benefit from using a geo-grid mainly due to economies of scale. Please contact us for further guidance.

Note: DOT type 1 or similar could be used as the sub-base (sometimes it is already on site), but drainage would need to be considered.

3) The bedding layer.

For a gravel finish, the bedding layer needs to be a free draining, sharp angular 5 to 20mm gravel laid to a depth of approximately 40mm on top of the top layer of geotextile (above the sub-base). This bedding layer may require compaction using a vibrator plate or roller. The bedding layer will be required to be smooth and level to provide an even surface for the Suregreen pavers to be laid onto.

4) Laying Suregreen Pavers

The pavers should be laid onto the prepared gravel bedding layer, working from one corner laying adjacent paver grids into their connectors. The paver grids can be cut on-site using a handsaw, jig-saw or other mechanical saw to fit around shapes and obstacles.

5) Filling The Pavers

The final stage is to fill the pavers with the same 5 to 20mm sharp angular gravel. With the spikes and the shearing action of the gravel the pavers become locked within it so resisting 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 if necessary. For cosmetic appearance some clients may wish to overdress slightly with gravel. There is generally no reason to overfill the cells, the extra gravel will simply be displaced to the edges by the traffic movements.

Notes on Gravel

Experience has shown a 5mm to 20mm sharp angular gravel gives the best results for providing a long term, very low maintenance wearing surface. The gravel pieces interlock and shear with others and, more importantly with the specially designed paver grids. The smaller particles fill the smaller voids and working with the pavers, this gives a secure, locked sustainable finish. Single size gravel or rounded gravel like pea shingle will in due course lead to issues and failure. The more rounded and single size the gravel, the quicker problems are likely to arise.

Suregreen Paver
Installation With Grass

Suregreen grass pavers installation

Suregreen permeable grass paver can provide a solution to a wide range of traffic needs which may include pedestrians, bicycles, cars, vans, trucks and lorries.

The application might be a car park, an emergency access route or wheel chair / disabled access. Suregreen grass pavers have been designed, using carefully selected plastics, to meet the demands and loadings imposed across a wide range of end-use requirements and site conditions.

To ensure Suregreen permeable grass pavers operate at the optimum working condition over a long period of time, which could be 20 years or more, the pavers need to be installed correctly as per our guidelines described below.

All Suregreen plastic paver installations will have some basic requirements for a construction profile. Some component parts to the profile will need to be designed please ask about individual design considerations but the elementary building blocks are the same.

Installation Steps

Prior to any work on site, it is highly advisable to have a site survey even if only a rudimentary one. Questions like will the site drain naturally, what slopes, if any, need to be allowed for, what type of surface conditions are present and what type of soils are on site will need to be considered. Also it may be prudent to check if the type of soil on the surface is the same 200 to 400mm under the surface to avoid drainage issues.

Note: If there is a slope of more than 5% where a grass finish is required, it is advisable to check for further guidance.

Also consideration will need to be given to a supporting edge to the installation. This could be a simple treated timber frame or a more robust concrete kerb.

There are four basic layers to the 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 to the required depth required. The depth is based on the type and frequency of traffic using the installation and the ability of the existing soils to handle the imposed loadings. The sub-grade could be from 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 other method to create an even working surface.

2) The Sub-base Layer

On top of the sub-grade a sub-base layer needs to be installed. The depth of this layer would have been pre-determined at the design stage. This sub-base layer needs to be both stable and porous. he sub-base ideally needs to be composed of a free draining sharp angular fill material (angular stone / aggregate), 95% of which the particle size is of a mixed nature between 5mm to 45mm (MOT type3 or similar) with reduced fine content. This would provide a stable and porous sub-base / hard-core after compaction. MOT type 1 / crushed concrete would be generally unsuitable because of the high fine particle content therefore having minimal porosity and permeability. The sub-base needs to be compacted to the required depth. At the bottom and the top of the sub-base a geotextile separation layer needs to be installed. This geotextile will stabilise the sub-base by separating / filtering and so limiting fine material migration into the sub-base while being permeable to allow water to infiltrate. The fine material, if allowed through, would cause eventual deformation and dipping of the top surface along with drainage issues. On top of the bottom layer of geotextile a 30KN geogrid can be applied to reduce the depth of sub-base used and also reduce the amount of spill caused by works. However, not all sites will benefit from using a geo-grid (mainly due to economies of scale). Please contact us for further direction.

Note:- MOT type 1 or similar can be used as the sub-base (sometimes it is already on site), but drainage would need to be considered. Again please contact us for more technical advice.

3) Bedding Layer

On top of the of the geo-textile that covers the angular stone sub-base construction, a layer of approximately 40mm of 60/40 root-zone sandy soil should be placed and compacted. This bedding layer should been not less than 35mm deep to allow good grass root structure to grow and no more than 50mm deep after compaction to avoid possibly compromising the structural integrity of the construction profile. The root-zone layer will need to be levelled off to provide an even surface for the plastic pavers to be laid.

4) Laying The Pavers

These should be laid onto the prepared root-zone bedding layer, working from one corner and laying adjacent paving grids into their connectors. The pavers can be cut on-site using a handsaw, jig-saw or other mechanical saw to deal with shaped areas and obstacles.

5) Filling The Pavers

The pavers should be filled nearly to the top with the root-zone mix leaving a gap of approximately 5mm from the top. This layer can be brushed in and not compacted. Overfilling is likely to cause unnecessary compaction of the root-zone when traffic passes over leading to bad retention of the grass layer. The filled surface can then be seeded, fertilized and watered in if necessary. Rolling in turf is not advised.

Notes on Root-zone

Experience has shown that to achieve the best long term results and optimum working conditions for Suregreen pavers when a grass finish is required, the soil fill should be 60/40 root-zone. Root-zone is a blend of semi-rounded sands of a selected grain size mix and sandy soils. Root-zone is used on most good sports pitches, golf courses and for horticultural uses. Root-zone has good drainage, encourages good and rapid grass growth and has a good weight bearing capacity.

Notes On Grass

It is recommended a hard wearing amenity grass seed mix is used for seeding such as mini ryes and fescues for example. The grass, once established, will need to cope with the expected traffic in both wet and dry conditions. Consideration needs to be give to the time scales for use when the installation is carried out. At first, the area should only be used for critical movements. If used too soon the grass could be damaged or even killed off. Alos Suregreen pavers have been designed to allow the grass root structure to entangle with the pavers open structure providing strength and stability to resist the loadings imposed by the traffic.

It must also be considered, when sowing the grass, what time of year it is and the prevailing weather conditions. A strong vibrant grass growth is needed and will generally take approximately 6 to 8 weeks in the growing season to become viable for traffic loads and wear. The best times of the year to seed is spring and autumn and away from the extremes of heat and cold.


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Information on this site is subject to change at any time without notice. The publisher accepts no liability for loss or injury arising from the use of information on these pages. All prices exclude delivery unless stated otherwise. All sizes are approximate. Pictures of products are for guidance only. Colours cannot be reproduced accurately on-screen due to technical reasons. We endeavour to keep all information up to date but cannot guarantee availability of any product.