Installation / guarantee

To ensure sufficient drainage, we excavate the soil to obtain a minimum incline of 2% ( 20 mm/m or ¼ inc per foot)

The excavation contour should extend beyond the surface to be paved at least 300mm (12″). Ideally, this distance should be 1 to 11/2 times the thickness of the foundation. The stability of the project depends on this measurement, which ensures that the paving stones at the edge will be as well supported as those in the center.

We level the bottom of the excavation with a rake and, if the soil is sandy, we compact it with a vibrating plate. It is preferable not to pack clay soil at this stage. In this case, the use of a geotextile membrane placed between the natural soil and the foundation is recommended to prevent foundation contamination by clay and ensure greater stability.

We spread and compact the 20-0 mm (0-3/4″) stone in 100 mm (4″) layers. We lightly water the 20-0 mm (0-3/4″) stone to make tamping easier. To ensure an adequate foundation, we compact the stone several times with a vibrating plate or a jumping jack. Once this stage is completed, we will be able to see what the final result will look like.

We spread between 15 mm (5/8″) and 25 mm (1″) of concrete sand or screening. We bear in mind that a 25 mm (1″) bed will be reduced down to 15 mm (5/8″) in thickness once compacting is completed after the paving stones are installed.

We level the concrete sand.

We take care not to compact the screenings or the sand before laying the pavers on the paved surface..

We arrange the paving stones according to the pattern chosen with a 90º angle if it possible. Proceed by walking on the paving stones.

Paving stones are manufactured with side spacers that will set a space of 3 mm (1/8″) between each pavers. A space of 2 mm must be allowed for paving stones without spacers.

We check the alignment of the pavers after every five rows installed and adjust them, if necessary, using a screwdriver.

Once we have finished laying them, we stabilize the pavers using a vibrating plate. This operation will settle the stones into the bed while leveling the surface. For best result, we run the plate over the pavers two or three times time in both directions. The paving stones will settle into the screenings or the concrete sand by about 10 mm (3/8″)

We spread concrete sand over the paving stone, we let dry, if necessary, then we work it into the joints by brushing in all directions.

We remove the excess sand and we work the remainder in by passing the vibrating plate over it.

We will leave you a number of paving stones for replacement.

We dig a trench. The excavation depth must take into account the 150 mm (6″) depth of the foundation as well as the buried depth of the modules or of the first row of the modules. We take into consideration that 10% of the height of the wall should be buried. The width of the trench will depend on the type of block selected. However, we must allow for a trench of at least 300 mm (12″) in width to construct a drainage system with clean stone behind the wall.

We cover the back and the bottom of the trench with a geotextile membrane to prevent the soil from obstructing the drainage system. This geotextile membrane should project about 300 mm (12″) beyond the top of the slope.

We prepare a 150 mm (6″) foundation of 20-0 mm ( 0-3/4″) crushed stone (in the case of clay soils, it is strongly recommended to increase the depth of the excavated areas) and compact using a jumping jack or a vibrating plate. Then install a 102 mm (4″) diameter perforated drain on the foundation and connect it to the existing drainage system. This drain will be covered with 20 mm (3/4″) crushed stone.

We lay the blocks level on top of the foundation according to the layout chosen.

We fill the space behind the blocks with clean stone of 20 mm (3/4″). Pack down lightly.

We install additional rows. Back fill the wall approximately every 200 mm (3/4″). We use capping modules for top off the wall (if available for the type of retaining wall chosen). We use concrete glue to secure them. To finish, we cover the clean stone with the excess membrane in order to avoid contamination of the drainage system with soil. We fill and we level the soil behind the last row of blocks to complete the job.