Preparation of the Base
OPTION 1: Subsoil Base
• Although the recommended base is concrete (see
Option 2 below) you may choose to construct your
pool on undisturbed subsoil. You must satisfy
yourself that your site conditions are suitable. If
your site is wet and prone to ground water or
flooding use a concrete base.
• Never construct your pool on made up ground,
always dig down to undisturbed subsoil.
• Clear an area at least the size of the appropriate
concrete base.
• Ensure that the cleared area is flat, level and
smooth and that all vegetation has been removed.
• Ensure that all stones, sharp objects and roots are
removed. Failure to prepare the ground will result
in a damaged liner. Any damage caused to the liner
by not using the recommended concrete base is
specifically excluded from any warranty.
• Please refer to the later section Levelling the Floor
(in Section C) as extra work may be required at that
stage if a concrete base has not been used.
• The recommended minimum thickness for a
concrete base is 100mm (4”). Using a steel
reinforcing grid in the concrete will greatly increase
its strength and is recommended. Every site is
different so give due consideration to increasing
this specification if you have unstable ground or any
other concerns. If in doubt seek the advice of a
ground working contractor or a civil engineer.
• Never construct your pool on made up ground,
always dig down to undisturbed subsoil.
• The minimum size of a concrete base should be
300mm larger than the outside perimeter of your
pool walls.
• Ensure that your finished concrete is absolutely
level over the whole pool area. If your base is not
level the pool water level will show this after filling.
• Ensure that your finished concrete is absolutely flat
over the whole pool area. Any high and low areas
will cause difficulties with construction and spoil the
finished look of the liner floor.
• Ensure that your finished concrete is absolutely
smooth. Rough concrete can damage the pool
liner. The swimming pool liner and felt will not hide
imperfections. Tamp lines or trowel marks will show
through when the pool is filled.
• Allow your concrete to cure before assembling your
pool.
OPTION 2: Concrete Base
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