SECTION A: Preparation of the Base
OPTION I: Subsoil Base
• Although the recommended base is concrete (see Option II 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.
• Dig out the marked area to a depth of 100mm / 4”.
• 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.
OPTION II: Concrete Base
• The recommended minimum base is a 100mm (4”) thick concrete pad. 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 concrete base for your pool size is shown in the Concrete Base Layout Drawing
[see page 16]
.
• 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.
3
16
•
M
a
xi
mu
m
b
a
se
si
ze
d
un
d
erli
ne
d
.
•
C
o
nsi
d
er
exte
nd
in
g
th
e
b
a
se
a
re
a
o
n
o
ne
si
d
e
fo
r
th
e
exte
rn
a
lla
d
d
er
.
•
C
o
nsi
d
er
exte
nd
in
g
a
no
th
er
si
d
e
fo
r
p
la
ci
ng
th
e
p
ump
a
nd
filtra
tio
n.
•
N
o
te
th
a
t
th
e
ski
mme
r
ca
n
no
t
b
e
o
n
th
e
sa
me
w
a
ll
a
s
th
e
la
d
d
er
o
r
o
p
tio
na
lfi
ltra
tio
n
en
clo
su
re
.
