Gravel Stabilisation
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Gravel & Grass Stabilisation The process of gravel stabilisation was originally developed in Holland over 25 years ago and has become a significant paving and driveway solution in the UK, as greater emphasis on sustainability and maximum recyclability has become an essential ingredient in modern construction. Cedar Nursery has been supplying stabilised gravel reinforcement panels since 2003. We are now main UK distributors for StablePATH, StablePAVE and StableDRIVE, leading producers of honeycomb plastics in Europe. StableDRIVE was introduced to give greater lateral control for more intense vehicular applications and StablePATH as a permeable pathway system, which was free draining, low maintenance and cost effective to install. All products are either made from fully recycled materials or part recycled materials all of which are fully recyclable. Stabilised gravel provides a natural alternative to Resin Bonded paving, asphalt and other paving materials. StablePATH Specially design panels for pedestrian areas of stabilised gravel, translucent / white finish StablePAVE Gravel stabilisation for domestic driveways, white finish, made in Europe StableDRIVE Heavy Duty panels for vehicular traffic, translucent / white finish, Made in the UK StableGRASS Designed to cope with vehicular traffic, comes in recycled black plastic, made in the UK 3
A naturally permeable pathway system for pedestrian access StablePATH is a specially designed pathway gravel stabilisation panel to make permeable pathways simple and cost effective to install. StablePATH has been specially designed on smaller panels (1200x800mm) to make pathway installation quick and simple. The panel size of 1200x800mm means minimal cutting and wastage for either 800mm (one-way pedestrian pathway) or 1200mm (two-way pedestrian). The panel depth is 25mm - we recommend a maximum aggregate size of 10mm. StablePATH - 1200x800x25mm No sinking or rutting No spreading Free draining Wheelchair friendly Low maintenance Quick and easy to install See page 12 for product specifications 4
The Product It consists of polypropylene panels formed from hexagonal cells, which are then laid on compacted ground and filled with gravel. The panels are designed in such a way as to inhibit weed growth and help prevent gravel loss, whilst remaining free draining. The gravel compacts into the panel sections to form a solid surface. The Benefits A durable, firm and level surface. Easy passage for foot traffic, vehicles, pushchairs, bicycles and wheel chairs. Restricted gravel migration - low maintenance finish. Completely porous thereby reducing the need for complicated and expensive drainage solutions. SUDS compliant. Quick and easy to install, no specialist tools or training needed. 5
StablePAVE (replaces Nidagravel) is suitable for light vehicle and pedestrian use, ideal for residential driveway applications. We all know gravel can add an elegant touch to any driveway or business premises, but all too often the disadvantages which can be associated with gravel prevent it from becoming the product of choice. Thanks to StablePAVE driving, walking, cycling and wheeling a bicycle, wheelchair, pushchair or pram across gravel are no longer a problem. The gravel is laid in honeycombs which keep it in place and prevent it moving or migrating. Ugly ruts, puddles and potholes are a thing of the past. StablePAVE is supplied on 2400x1200mm panels, at a depth of 40mm. The panels come with an integrated woven membrane on the underside of the panel. The Product StablePAVE consists of polypropylene panels (2400m x 1200mm) formed from hexagonal cells, these are then laid on compacted ground and filled with gravel. The panels are designed in such a way as to inhibit weed growth and help prevent gravel loss, whilst remaining free draining. The gravel compacts into the panel sections to form a solid surface. 6
The Benefits A durable, firm and level surface. Easy passage for foot traffic, vehicles, pushchairs, bicycles and wheel chairs. Restricted gravel migration - low maintenance finish. Completely porous thereby reducing the need for complicated and expensive drainage solutions. SUDS compliant. Quick and easy to install, no specialist tools or training needed. StablePAVE: Cost effective life time investment StablePAVE trays are virtually maintenance free. If the honeycomb cells become exposed simply top up with gravel. A light raking once in a while will maintain the finished look, this isn t arduous as you are only raking 10-20mm of gravel. 7
Designed and manufactured in the UK from recycled materials StableDRIVE is the naturally permeable and SUDS friendly alternative to resin bound paving. Designed and manufactured in the UK from recycled materials, our heavy duty StableDRIVE gravel stabilisation panels provide a secure gravel containment and reinforcement system, designed to cope with vehicular traffic, up to and including commercial, utility and emergency traffic. The system is ideal for car parking, access roads, hard standings, lay-bys, caravan sites and high-use driveways and will prevent gravel migration and rutting or spreading. StableDRIVE is supplied on 1180x944x32mm, each panel contains 1.1m2 and is easily cut to shape. The panels are 32mm deep with a 2mm thick sidewall for extra strength. 8
Benefits Strong and flexible in use, the units have been independently tested to confirm compressive strengths of 280 tonnes per m², coping easily with axle weights up to 65 tonnes. Integrated clip joining system that aids lateral restraint, fast and simple to install. Supplied ready clipped together in 1.1 m² sections (4 x panels) which can be simply extended or separated on site. 55mm Honeycomb diameter allowing for gravel sizes up to 20 mm to be utilised (smaller aggregate sizes may be used without detriment). Manufactured in the UK from 100% UK sourced recycled MDPE, eco friendly and sustainable credentials. SUDS Friendly - Free draining throughout The units are lightweight and easily handled on site. Construction is unaffected by adverse weather. Productivity rates are high, requiring no specialist skills, leading to very cost effective installation. Gravel filled StableDRIVE creates a natural alternative to resin bound surfaces, which is easily maintained, non intrusive and very much in keeping with local surroundings. 9
Heavy duty grass stabilisation for pedestrian or vehicular use StableGRASS provides a secure, heavy duty, high performance ground reinforcement for pedestrian or vehicular access or use where the maintenance of a natural grass or vegetation appearance is important. The system is designed, and has been independently certified, for use up to and including heavy vehicles, so is ideal for permanent or temporary access roads, off road parking, caravan sites and agricultural show grounds. StableGRASS is supplied as panels 1000mm x 1000mm. StableGRASS can be utilised for all grass paving applications from simple pedestrian access, up to regular vehicular access. The determining factor on loading is sub base provision and examples of typical installations are illustrated here. 10
Benefits Strong and flexible in use and able to cope with axle weights up to 66 tonnes. Units clip together providing excellent lateral restraint against vehicle turning stresses. Fast and simple to install. Equally suitable for grass and other growing mediums such as sedum, so can be used as part of green roofing systems or decorative embankments, in addition to horizontal access. Units are manufactured in the UK from 100% UK sourced re-cycled MDPE, adding eco friendly and sustainable credentials to the product. The system is free draining throughout, significantly reducing demand on surface drainage capacity For PEDESTRIAN USE WITH OCCASIONAL PARKING. For PEDESTRIAN AND REGULAR VEHICLE USE. 11
Product Comparison Chart StablePATH StablePAVE StableDRIVE StableGRASS Panel size (L x W - mm) 1200 x 800mm 2400 x 1200mm 1180 x 944mm 1000 x 1000mm Square metres per panel 0.96 2.88 1.10 1.00 Panel depth 25mm 40mm 32mm 40mm Price (per square metre) 12.00 + VAT 13.95 + VAT 13.95 + VAT 12.00 + VAT Price (per panel) 11.52 + VAT 40.18 + VAT 15.35 + VAT 12.00 + VAT Minimum order 1 Panel (0.96 m2) 1 Panel (2.88 m2) 1 Panel (1.1 m2) 1 Panel (1.00 m2) Load Bearing 50 T/m2 filled 40 T/m2 unfilled (80 T/m2 filled) 280 T/m2 unfilled 320 T/m2 filled Material Polypropylene (recyclable) Polypropylene (recyclable) 100% recycled MDPE Polyolefin (recycled) Usage Foot traffic, wheelchairs, bikes and pushchairs. Vehicles, wheelchairs, bikes and pushchairs. Vehicles, wheelchairs, bikes and pushchairs. Maximum slope 1:10 1:10 1:10 1:10 Up to 20mm (10-16mm Recommended gravel size Up to 10mm Up to 16mm (10-16mm ideal) Up to 20mm ideal) Recommended gravel overfill 10-20mm 10-20mm 10-20mm 10-20mm Weed membrane attached Yes Yes No No Honeycomb diameter 39mm 39mm 55mm - Wall thickness 1.1mm 1.1mm 2.0mm 2.8mm Vehicles, wheelchairs, bikes and pushchairs. Drainage capacity Completely permeable Completely permeable Completely permeable Completely permeable SUDS friendly Yes Yes Yes Yes Biological resistance Very good Very good Very good Very good Colour White White White / Translucent Green Weight (unfilled) 1.2kg/m2 1.8kg/m2 4.1kg/m2 5.7kg/m2 Area of manufacture Europe Europe UK UK 12
Frequently Asked Questions What size gravel can you use? StablePATH Up to 10mm diameter StablePAVE Up to 16mm diameter StableDRIVE Up to 20mm diameter StableGRASS Suitable for soil only Does it drain? Yes, water simply runs through the gravel and honeycomb all products are completely porous. How do you edge it? 1. Brick & Cement 2. Haunched concrete 3. Tanalised timber 4. Tarmacadam (for ramping to existing surfaces) How long does it last? We have seen applications in Holland which have been laid for approx. 25 years and are still being used. The product is UV stable, and is resistant to most chemicals. Can you drive cars on this? Yes (excluding StablePATH) with the correct sub-base (75mm to 200mm of hard-core / crushed concrete) and 25mm to 50mm of compacted sharp sand. The product will withstand occasional large lorries such as removal lorries, horse boxes, skip lorries and oil deliveries. Can you use it on a slope? Gentle slopes are OK; (up to 1 in 10) you must maintain the area by raking the gravel. If the honeycomb can be seen, this is when damage occurs. Can you install it on an old drive / concrete base? We do not recommend that you use the existing drive as a sub-base for the these products as this can cause drainage problems with non-porous materials. Where are these made? StablePAVE and StablePATH are produced in Mainland Europe, StableDRIVE, StableGRASS and R-Pave are from the UK. Are they frost proof / heat proof? Yes, to approx. -43C and +80C What maintenance do I need to carry out? Ensure that the honeycomb is always covered with a thin layer of gravel (approx. 10-20mm). If you can see the honeycomb this is when it can become damaged. You may need to top up the gravel on heavily trafficked areas. 13
SUB BASE & INSTALLATION GUIDELINES Stabilised Gravel Paving Stabilised gravel honeycombs elements should be placed on suitable, compacted previously constructed sub base (see below for sub base options) Sub base should receive a lightly compacted blinding layer of up to 25-30 mm of grit sand or limestone/granite fines. Units should be bedded onto blinded surface, in a flat layer, to a slight fall if required. Stabilised gravel honeycombs units are then overfilled with selected gravel to a recommended depth. Gravel requirement will be 55 kg and 65kg per sq. metre depending on system used. After fill, surface should receive a misting of water to wash through any residual surface fines and then accelerate consolidation by a single pass with a plate vibrator or similar light compaction aid. NOTES - SUB BASE OPTIONS: a. For most applications including pedestrian, light vehicle and occasional access by emergency and utility traffic, sub base should comprises of 10 cm of fully compacted type 1 sub base, with a 25-30mm blinding layer. b. For regular heavier vehicle access and heavy traffic areas, such as car parks.15cm of fully compacted type 1 sub base, with a 25-30mm blinding layer c. For domestic, pedestrian only applications it is possible to set the units onto compacted earth, followed by a sand blinding layer. d. For fully permeable paving, or water harvesting applications make up should be: Earth fully compacted Layer of geotextile 25-27.5 cm of single size filter media gravel, compacted in layers. Geotextile layer Sand/fines bedding layer Stabilised gravel honeycombs panels filled to required depth and finished as per recommendations above. 14
Step 1. The panels are placed on the prepared sub base. Each product has either projecting flaps of membrane (Subsequent panels should be laid on these overlaps to inhibit weed growth between trays) or an integral clipping system. Step 2. The retaining edging keeps the panels in place. All our systems can be cut easily with a power or hand saw to conform to any shape required. Step 3. The vehicles / wheelbarrows used to deliver the gravel can be driven over the filled panels. The most effective way of filling them is from the front. This helps to compact the gravel already laid with each subsequent trip. Step 4. The gravel is then simply spread out across the honeycombs with an overfill of approximately 10 to 20 mm to protect the panels and conceal them from sight. 15
Cedar Nursery T: 01932 862473 F: 01932 867152 E: sales@landscaping.co.uk W: www.landscaping.co.uk 16 Cedar Nursery Horsley Road Cobham Surrey KT11 3JX