Pool renovation: understand the damage and plan the work
A new finish does not solve every pool problem. The shell, waterproofing, fittings and equipment need to work together. Separate necessary repairs from improvements you would like to add.
Which work does your pool need?
A faded liner, loose tiles, cracks and water loss are different starting points. Distinguish repair from a change of appearance. One worn component does not necessarily justify replacing an otherwise working installation.
For a residential shared pool, hotel or sports facility, operating requirements and closure dates need discussing early. A private outdoor family pool is not an adequate standard specification.
| Situation | Useful first step |
|---|---|
| Unusual water loss | Investigate shell, fittings and pipework |
| Worn liner or coating | Assess finish and substrate together |
| Cracks, loose tiles or blisters | Establish the cause and extent of repair |
| New steps or equipment | Check connections, space and compatibility |
Do not assume a liner is responsible for water loss
A falling level can have several causes. Skimmers, inlets, drains and pipes may be involved as well as the lining. Depending on the evidence, a contractor can choose appropriate checks before opening extensive areas.
Agree whether leak detection and repair will be quoted separately. The report should explain findings and testing limitations. A new liner does not repair a leaking pipe outside the pool.
Match the new lining to the existing pool
A prefabricated liner and a membrane welded on site are different systems. Pool shape, fixing method, steps and connections influence suitability. For tiles or coatings, the waterproofing beneath the finish also needs assessing.
A new surface does not automatically make damaged or incompatible substrates suitable. Ask for preparation, protective layers and connection details to be specified. Steps and areas people stand on need appropriate slip resistance; material choice involves more than colour.
Water surface area is not renovation area
For a rectangular pool measuring 8 × 4 m with a uniform depth of 1.5 m, the floor and four walls total 68 m². The water surface is only 32 m². Steps, benches, fittings and cutting allowances have not yet been included as additional work.
Provide length, width and depth where known. With curves or varying depths, these are initial reference dimensions rather than an exact survey. The contractor needs to measure the actual surfaces and details.
Separate material prices from a complete renovation
Material example checked in October 2026: approximately CHF 1,490 including VAT for a prefabricated 0.8 mm liner, oval, 8 × 4 × 1.35 m. Installation, renovation and delivery need separate clarification.
This product is neither a complete liner-replacement price nor a market average. Removal, disposal, preparation, fittings, equipment and commissioning may add to the work. A dependable total requires a defined scope.
- Existing pool and removal. Investigation, emptying, removal of materials and appropriate disposal.
- Renovation. Substrate, waterproofing, finishes, fittings and expressly selected equipment.
- Handover. Checks, filling, adjustment and instructions; transport, other trades and VAT clearly stated.
Renew equipment where it makes sense
Renovation is an opportunity to assess filtration, circulation, treatment and any heating. Replacement should reflect the existing system and actual needs. Compatible components matter more than simply choosing a more powerful unit.
Check material compatibility with the water treatment: not every coating is suitable for salt electrolysis. Include existing covers, pipework and electrical connections when planning changes. An ordinary pool cover does not automatically provide child protection.
Preparation, timing and returning to use
Do not empty the pool in advance just to request a quote. Whether it can stand empty, and for how long, depends on its construction and conditions. Pool water, cleaning water and residues also need an agreed disposal approach rather than being sent indiscriminately to one drain.
Substrate repairs, drying, product requirements and weather affect timing. Agree when the pool will be usable, not just when installation ends. Changes to size, use or heating may require further local checks.
- Investigate. Condition, suspected leaks, dimensions and existing equipment.
- Specify. Required work and optional improvements, with responsibilities at each interface.
- Hand over. Watertightness and function checks, records and care instructions.
What makes quotes comparable?
Check that contractors include the same surfaces, steps and fittings. Establish which parts stay and which are replaced. Material descriptions, preparation and exclusions often explain the price better than an isolated square-metre rate.
Agree how extra work will be approved if damage appears after removal. Obtain warranty scope and conditions in writing. A material warranty does not automatically cover old pipework or every retained component.
Frequently asked questions
Does water loss always require a complete new liner?
No. Investigation establishes whether the fault is in the lining, a fitting or a pipe and which repair is appropriate.
Can a membrane cover existing tiles?
Sometimes, depending on the system and condition. Stability, evenness, compatibility and connections must be professionally assessed first.
How long does renovation take?
Replacing a finish and renewing substrates plus equipment involve different programmes. Drying, deliveries and weather also affect completion.
Can existing equipment stay?
Yes, if its condition and sizing suit the renewed pool. Assessment should consider the whole system without automatically replacing every device.
Should I empty the pool before requesting a quote?
Not without agreement. Records, dimensions and a visit may initially suffice; the contractor will identify any further investigations needed.
