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Sub-Base Surface Preparation for Resin Bound Gravel Surface

Sub-base Preparation Ready for the Installation of Resin Bound Gravel Surface

Removal of Existing Surface

Removing existing block paving

The first step towards creating a beautifully finished resin bound surface would be to remove any existing block-paving, concrete or tarmac surface. If removing block paving from the area, the blocks may be recycled later by using the bricks as edging around the installation should this be a desirable style of edging. If there is no existing surface in place, you may skip this process

Excavation

Excavation of site

Once the existing surface has been removed, the area should be carefully excavated to a depth which is appropriate for the type of installation carried out. Advice should be sought on the required depth for your particular installation, taking into account the firmness of the ground and the total weight of traffic using the surface. A recommended minimum depth would be to excavate to 220mm.

Installing Perimeter Edging 

Installing perimeter edging

Around the edges of the installation, an appropriate load bearing edging should be installed . We recommend products such as pre-cast concrete kerbstones, block-paving bricks or plastic lumber which do not rot over time and provide a solid edge around the installation. These should be installed according to the relevant manufacturers instructions however if guidance is needed, please contact our helpful team who will happy to advise on other suitable products.

MOT Type 3

Installing MoT Type 3

Once the perimeter edging has been installed properly and securely, then a base layer of MoT type 3 should be laid at the required depth. The minimum recommended depth of hardcore should be 150mm but this depends on a number of factors including sub-grade stability and intended use for the surface. This layer of MoT should be compacted using a roller or vibro-plate (whacker) to ensure the base is consolidated.

If you need advice regarding the sub-base thickness, please contact us or take a look at Sub-Base Thickness Guide.

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