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How to Install Interlocking Stones

At Enviro-Loc Interlocking Ltd, we start by contacting your local municipality to locate any underground utilities such as gas and hydro. Once we arrive on site, we mark out the interlocking areas with spray paint or string lines. We extend slightly larger than the agreed size to allow for potential grievances. Once the areas are marked and underground utilities are located, the excavation begins. 

We use the proper excavation machinery as it will ensure an evenly dug area for the interlocking stones. Our goal is to excavate the earth to a flat surface at the required depth. The excavation depth varies based on soil conditions and expected usage. The standard base material required is; 4" to 6" for pedestrian traffic (patios and walkways) and 7" to 9" for vehicular traffic (driveways and driveway extensions).

We recommend using a granular 3/4" crush gravel for in ground solutions or HPB (high performance bedding) for raised areas. After leveling the base, we use a vibrating plate compactor to tamp the base material. It is important to install interlocking pavers on a well compacted, solid base.

Interlocking pavers should be laid starting in a corner which will run square to foundation walls. It is important to use string lines to ensure our lines are straight and maintaining equal distances off the walls. Once the installation is complete and final cuts are made, the stones must be compacted.

Then we install a final layer of material for levelling. This layer should be between 1/2" to 2" thick. One of the following three options are recommended based on the drainage and level of compaction required; bedding sand, limestone screening and HPB. We ensure there is a 1% to 2% slope away from structures and/or towards the grass or gardens.

Most residential applications require a bonding agent called polymeric sand to be installed between the joints of the interlocking pavers. This material is swept into the joints and wet to inhibit a chemical reaction. This will lock the pavers into place and prevent future shifting. It also minimizes the risk of weed growth.

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