Laying of paving on sand
The laying of slabs gravitated on sand is a very easy technique to implement. For paving a terrace, a pedestrian or driveway, laying on sand is the fastest and most economical. It is also possible to replace the sand with gravel to prevent ants from building their anthill and destabilize the slabs in the future.
The best times for paving are when the floor is not too dry or too wet.
Delineate the outlines of the chosen terrain and dig the pit
Start by delineating the contours of the place where the gravestones are laid with stakes and cords. Dig after the surface determined with the spade to a minimum depth of 10-20 cm in addition to the thickness of your slabs.
Strip the chosen terrain to a depth sufficient to install the stabilization layer
Lay a geotextile film
Arrange in the bottom a non-woven felt or a geotextile film to block the growth of plant roots and prevent sand from leaking into the soil.
Equalize the bottom, remove the roots and stones before laying the geotextile film
Put an underlay to stabilize the ground
In the case of a very loose soil think to put a base underlayment. In some cases, especially in the laying of slabs on sand, it is advisable to use crushed stone, chippings or 'all coming' (stones, gravel, broken bricks, mineral rubble ...) as a product of development. level and stabilization. The thickness of the sub-layer is defined by the conditions of the ground and especially by the nature of the support. Nevertheless it should be at least 5 cm.
Flattening of the underlay
Level the surface
Flatten the bottom with a rake, a ruler and a level. Give the surface a slight slope to allow the evacuation of rainwater. Tamp with a manual lady to ensure tiling stability.
Install rafters and spread sand
Install rafters all around the pit. The top height of the rafters must correspond to the depth where the gravestones are laid. Fill the pit with sand at the top height of the rafters.
Pass a large metal ruler following the slope created by the parallel rafters to level the surface. Remove the rafters and fill the space left free with sand. Spread the rake by adjusting its thickness on previously stretched cords. Shoot with the ruler.
Anchor the slabs in the sand
Begin the laying of the slabs one by one, spacing them approximately 1 to 2 cm apart. Walk on the slabs already laid and use a rubber mallet to anchor them in the sand. Regularly check that the slabs are level.
The sand layer absorbs soil deformations
Gently hammer the surface of the slabs with a rubber mallet
Fill the joints
When all the slabs are installed, spread sand, sweep and rain several times to tamp the joints. Remove excess sand or add if necessary.
After installation, it is necessary to fill the joints
Indeed, the laying of slabs on sand combines strength of the structure and ease of realization