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Block & Liner Construction INFORMATION

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Building a Block And Liner Swimming Pool

After excavation to the required dimensions a 225mm (9 inch) thick perimeter wall is constructed from 450mm x 220mm x 100mm dense concrete blocks to a height of 1.06m (3ft 6 inches, 9 courses laid on the flat) on top of a 375mm wide x 150mm deep (15 inch x 6 inch) concrete foundation. The walls can then be rendered in sand/cement to provide a smooth face against the liner and a plastic linerlock extrusion is fitted around the top, or if the quality of the block work and joints is smooth enough, just a polyethylene foam or felt underlay can be used instead of the render. The base of the excavation is screeded with a 50mm (2 inch) layer of sand/cement to the specified profiles. A felt underlay is available as an optional extra for the floor of the pool. This disguises any slight imperfections in the screeding and is particularly useful to the DIY installer with little or no experience of screeding. It is especially important if you are planning to fit an underwater light, as this will highlight any imperfections in the screed, with a shadow behind.

Pool Location

Ideally the pool should be sited well away from trees to avoid leaf debris. Also bear in mind that hedges, trees, fences and walls may reduce the amount of sunlight reaching the pool area. A sheltered position from high winds is preferable.

Other important points to consider are as follows:

I. Ensure that NO electrical cables, water pipes, gas pipes, sewage pipes, underground phone lines or other obstructions run under the proposed location of the pool, (watch out for overhead electric cables as well, you will be using a long metal pole to clean the pool).

2. The filter plant should be enclosed and sited as close to the pool as possible (3-5m preferably). This will protect it from the elements, help pump efficiency and reduce the cost of pipework. The filtration plant should be installed on a level base, ideally at water level (try to avoid installing your filtration plant more than 300mm ( 12 inch ) above water level), if this is not possible then no higher than the surrounding paving (this is to avoid difficulties when priming the pump).

3. Availability of water supply.

4. Availability of a suitable discharge point i.e. soakaway, storm drain or ditch for the disposal of waste water used in the backwashing of the filter.

NOTE: local authorities do not normally permit the discharge of chemically treated water into their foul drains.

5. Proximity of changing facilities and toilets to the pool.

6 In the interests of safety, the access to the pool should be from the shallow end and we suggest that the pool area should be fenced off, to minimise the possibility of accidents occurring when the pool is unattended.

7. If the pool is to be heated, then the availability of an adequate oil, gas or electricity supply to the heating unit should be considered. Also the provision of an oil or gas tank if required. If a heat pump or electric heater is to be used, then the electrical supply should be checked to ensure it will accept the additional load.

Our kits DO NOT include any basic building materials such as concrete blocks, sand, cement, pea shingle or reinforcing rods for ring beams, you will need to source these materials locally.