What turnkey pool construction is, what it covers and what it leaves out

The table below gives the typical turnkey scope for a reinforced concrete villa pool and the items that fall outside it; in every contract the table is rewritten for the project and signed by both parties.

The three most disputed rows of the table are the pool surround paving, the plant room structure and the main supply lines. All three are needed for the pool to work, but none is part of the pool shell; in a turnkey quotation they are either written in square metres and metres or explicitly excluded. An item that is not written down is the item argued over at handover.

The technical specification covers the concrete class, water/cement ratio, reinforcement, waterproofing layer, finish material, equipment make and model, and target water values; work that is not specified gets built in its cheapest form. The programme leaves an allowance for weather and permit time and defines delay penalties in both directions.

Two sentences in the definition of turnkey form the backbone of the contract: the work is delivered ready for use for an agreed price and on a fixed date, and after completion the contractor carries responsibility for design, fitness for purpose and performance. The second sentence requires the contractor to draw or approve the design itself; a contractor who builds someone else's design without questioning it cannot take on turnkey responsibility.

Each stage payment matches the check output of one construction stage: the first payment with the geotechnical report and approved design, the second with the excavation level record and drainage photographs, the third with the concrete test samples and pour record, the fourth with the pressure test and water-tightness test records, the fifth with the finish checklist, and the final payment with the commissioning report and handover certificate. This arrangement saves the client from paying for work they have not seen, and the contractor from defending work that was never documented.

This is the rule we have applied in the pool projects we have commissioned since 1993: design first, payment second. The turnkey contract is signed once the design and ground survey are complete; the survey and preliminary design stage before it is carried out for a separate, small fee or within the scope of the quotation.

Without that file the owner knows neither where the buried pipes run nor which settings the equipment runs on; at the first fault the contractor is called, and every call becomes a warranty argument. The contents of the file are listed in the contract, and the final payment is tied to its delivery.

The first is logistics: the equipment travels by container, customs and conformity documents enter the programme, the container packing list is derived from the commissioning sequence, and a spare parts allowance is added. The second is labour: the structural work is done by a local crew, while pipework and commissioning are carried out under the supervision of our Turkish technical team. The third is the operational handover: training and the operating manual are prepared in the local language. In Algeria we delivered the complete spa of the Sofitel Algiers Hamma Garden for CSCEC using this model.

Established in industrial plant and building construction, the model brings two features to the fore when adapted to pools: a pool is a structure that can be tested with water, so performance is measured at handover; and a pool is operated every week after handover, so training and the manual are part of the product.

The short rule follows from this: turnkey pool construction starts with a scope schedule, its price is fixed once the ground survey and design are complete, each stage payment is tied to a document, there is no handover before the water-tightness test and commissioning report are passed, and no final payment is taken without the handover file. The model gathers responsibility for the pool construction process in one place; the condition is that the contractor taking that responsibility draws or approves the design itself.