Terrace

Install a pool, yes but ...

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Inground pool or above ground pool, you do not create a swimming pool in your garden ... The installation of a swimming pool requires a long preparation before the big dive ...

The pool, an inaccessible dream? Not necessarily. France is the first European market (and the second in the world) and is full of offers for all budgets, styles and uses: classic family pool or small pool, swim spa, infinity pool (O-Viva) or effect mirror (Beaver Pool, Diffazur).

For the installation of the basin, prefer a place sheltered from the prevailing winds, with the greatest possible sunshine. Choose it according to the house, so as to facilitate access to the pool from the house. And do not neglect the regulatory issues: building permit or not, authorization of the architect of the Buildings of France if one is in the perimeter of a listed monument, etc.

Privilege a local pool, more easily available if it is necessary to intervene in case of problem. Before signing, make sure that the company has a decennial manufacturer's insurance covering the possible problems due to the implementation.

1. What structure for my pool?

- The simplest to implement is probably the shell resin and fiberglass (Alliance Piscines). Molded at the factory, it offers a smaller choice of shapes than a masonry pool, but apart from above-ground pools, it is the least expensive solution on the market (between € 10,000 and € 35,000).

- Composite panels such as polypropylene, PVC (Fiberglass at Desjoyaux, Blue Variations) or steel (Aquilus, Waterair) allow pools with more original shapes. We can find from 10 000 € in kit, but it is necessary between 15 000 € and 45 000 € in version ready to dive (swimming pool entirely installed by a professional).

- The wooden swimming pools (Piscinelle, Azteck range of Zodiac) are installed like a construction game (from 10 000 €). Easy to put in place, these basins have two drawbacks: they do not allow rounded shapes and impose an effective drainage system so that the water does not stagnate.

- The most expensive formulas (from 30 000 €) are those that require the use of concrete (Blue Square, The Spirit Pool) or gunite, that is to say the shotcrete (Diffazur, Everblue).

2. How to seal?

- If the support is waterproof (shell or structure in shotcrete), the coating will have a primarily decorative role. The most economical solution is painting. Rubber-based, it provides support protection. Its maintenance is easy, but it must be renewed after a few years.

Do you have the attention to detail? Opt for a tile. In paste of glass or in enamel, it authorizes a great originality. Main disadvantage: the price of the material and the implementation. Coating is an alternative. Composed of marble, mica and quartz ("Quartzroc" and "Marbreroc" from Diffazur), it combines waterproofness and decoration and offers a wide range of effects.

- If the structure is not waterproof (cinderblock, wood, panel), you will have to choose a reported waterproofing: liner or armed membrane. Attention to maintenance: it is necessary to maintain the quality of the basin. In addition, these membranes "breathe" and let a small amount of water escape. To prevent it from stagnating, the basin that receives them must not be waterproof, or be drained to facilitate evacuation and prevent mold and degradations.
- Factory made to the dimensions of the basin, the liner is a kind of pocket 0.75 to 0.85 mm thick. It is fixed on the structure, with a protective felt between the two. Well laid and regularly maintained, it can last 15 years and more. Advantages: it changes easily (read further) for a cost of € 12 to € 30 per m2 excluding labor. On the other hand, it remains fragile and is not adapted for a basin of very large dimension or of too complex form. The reinforced membrane (PVC or FPO) is more resistant than the liner because twice thick and cut to measure. Assembly on site by hot welding, it adapts to all shapes and sizes. On the other side of the coin, its price is a little higher (from € 20 per m2).

3. What filtration system for my pool?

- By eliminating impurities, filtration ensures the quality of the bathing water. It can be traditional (pump, pipes, skimmer, discharge) or monobloc (without connection, fixed to the edge of the basin). Each manufacturer has his solution: rotating, aspirating or ecological jet at Diffazur, polyester media filter at Piscinelle, etc.

If you are looking for simplicity, you will opt for filter bags (or socks) that offer good filtration (20 microns) for a relatively reasonable cost. Disadvantage, they must be cleaned regularly (jet or washing machine) to maintain efficiency.

- The sand filter is the most common solution, even if it provides only medium filtration (40 microns). This can be improved by adding flocculant, a product that aggregates impurities with each other. This filter requires a regular but simple cleaning, and must be connected to the mains drainage. The sand is to be changed every 5 years. Its price remains affordable (from 300 €). The cartridge filter provides more efficient filtration (20 microns), but its maintenance is more common than the sand filter, and manual (jet wash). From around € 250.

Finally, the most efficient system (1 to 5 microns) but also the most expensive (800 € minimum) is the diatom filter. It uses diatomite, a powder of microscopic fossilized algae, which must be added regularly, which is the only intervention.

4. How to disinfect?

- To optimize the filtration, it must be doubled with a disinfection system. In addition to traditional manufacturers (Arch Chemicals, Mareva), manufacturers often offer their own answers. Also on the market are all-in-one systems, combining automation of filtration and dosing of disinfection products, remote control and alert in case of problems ("Klereo" from First Innov, with a maintenance contract) .

- The most common solution is chlorine. Powerful and of a good quality / price ratio (5 € the kg), it is used easily (proposed in block, pebbles, pellets and pellets). Be careful though: misused, it can cause allergies and irritations. Sensitive skins will turn to bromine instead. It is effective at high temperature and pH, but more expensive than chlorine (from € 8 per kg). Less aggressive, active oxygen (hydrogen peroxide) is available in liquid form (about 4 € per liter) or in granules and acts quickly. Antialgues, it is often associated with another product.

- The PHMB (hexamethylene biguanide polymer), in liquid solution or powder, proves relatively expensive (10 € per liter, 50 € per kg). But it is also the disinfectant that brings the most benefits, it is both odorless, not harmful and insensitive to pH.

- Very popular, other solutions without chemicals emerge as the salt electrolysis treatment (from 600 €), which uses 3 to 7 € of salt per day. More radical, ultraviolet treatment destroys all bacteria with a UV-C lamp, without products or residues (from € 1,000).
- Also noteworthy is the technique of copper / silver ionisation which reduces the use of chlorine ("Autoclean" by Pool Technologie) thanks to the diffusion of copper ions (algicide) and silver (bactericidal and disinfectant) .

5. Which equipment to choose?

- The heating. It allows to prolong the bathing season. Several systems are possible: electric heaters (from 300 €), the heat exchanger that uses the heat source of the house (from 1000 €), solar energy (panels from 1000 € ) or the CAP (from € 2,000).
-Lighting. Led technology is widely acclaimed today.
- The jets of water. They add an aesthetic dimension to the pool. Very popular, the water slides produce a pleasant visual effect (€ 1,500 to € 2,000).
- The shower. By opting for a solar shower, you will have free hot water (300 € to 2500 €).
- Swimming against the current. Warning: it is better to predict the right pipes from the construction (from 2 000 €).

- The robot cleaner. Connected to the skimmer or the discharge nozzle, it only cleans the pool. Take care to choose a material well adapted to the basin: shape, flat bottom or not (200 € to 2,500 €).

- The technical room. If you do not have a dedicated room, you will need a large box (often wood) or a small cabin to house filtration equipment, treatment products and heating system (from € 500).

- Pool shelters.If they are part of the security features, the pool shelters are also a great way to use the pool even in bad weather, as they warm the water and keep it clean (from 4,000 €).

Give a facelift to your pool

Like a house, a pool lives and ages. But the renovation of a pool is an opportunity to restore his youth by replacing the liner or changing the surroundings.

Change a liner

If a liner has a lifespan of 10 to 20 years depending on the quality of the maintenance to which it has been submitted, nothing prevents to renew it more often, for fun! The aesthetics of the basin largely depends on the color of its coating. Formerly the light blue was de rigueur, which gave the water an unnatural turquoise hue.

Today, we dare other colors. Green, the liner simulates a background of white sand. White or beige, it gives the water a crystalline aspect evocative of the South Seas. Black, it creates a sophisticated mirror effect. Other trend : printed liners of pebbles (Magiline) or mosaic (Waterair), on the entire surface or just on the water line. On the technical side, a change of liner must be programmed before the season to be able to enjoy it on sunny days, or at the end of the summer when swimming pools are no longer available. Never winter, because the pond cools too much. The operation requires a day's work. Once the pool has been emptied, simply unclip the old liner, remove the felt, treat the walls and disinfect them before placing the new liner. Depending on how it was attached to the pond, the operation may require removal of the curbs. A good opportunity to renew also the edge of the pool.

Laying a coping

For the choice, everything depends on the environment of the pool, the material of the terrace, and the look that we want to give it. Priority is now given to the natural with materials in keeping with the garden and architecture.
- Natural stone offers charm and authenticity, but fears stains because it is porous. When it comes to reconstituted stone, maintenance is easier. But in any case, it will be chosen rather of a local shade, in agreement with the environment.
- Wood harmonizes perfectly with the vegetation. But to keep its color, it needs to be treated regularly. Composite wood is very trendy. Blend of wood fibers and high density polyethylene, it recreates with realism the touch and appearance of exotic woods, less maintenance (Fiberdeck, Forexia Silvadec, Geolam, Sedpa Xyltech, Twinson ...).

- The type of pose plays on the final aesthetic. For the stone, a Roman opus will create a regular effect, more in keeping with an urban environment, while an uncertain opus will blend better in a more rustic garden.
- The flat margins, which come in recovery of the basin, give a contemporary aspect and put forward the terrace. On the contrary, curved stones will emphasize the basin. As for wood, natural or composite, it can be the object of a more or less regular, sophisticated or natural calepinage.

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