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Depending
upon what you actually want to use the paved area for, and depending
upon the condition of the ground, there are 3 different ways of
creating a stable foundation for your paving slabs.
For
most gardeners who wish to have a path or patio there needs only
to be a combination of mortar and a 40-50mm layer of compacted sharp
sand.
This
foundation will support pedestrian usage and is perfect for creating
a space for barbecues so long as the ground underneath is relatively
firm. If this is the case, then you need only to remove the turf
and topsoil from the area you wish to pave to a depth which can
accommodate the layer of sand, the layer of mortar and the actual
paving slab.
If
however, the soil is not stable or is often wet, you may need to
use a 100mm layer of compacted hardcore in conjunction with the
mortar and sand. This is also suitable for paths or patios which
have to take the weight of large garden features, or are used to
take mowers, rollers or any other heavy garden equipment.
The
layer of compacted hardcore acts as a stabiliser for the paving
slabs and it also helps to ensure adequate drainage. This is a must
if you wish your patio or path to remain in good condition. Because
of the addition of this layer of compacted hardcore, you will obviously
have to dig a little deeper into the soil to accommodate the extra
100mm.
Finally,
should you want to create a driveway from paving slabs, you will
need to place the slabs directly onto a 100mm layer of wet concrete
which is laid upon a 150mm layer of compacted hardcore.
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