Styrofoam Pool Kits: The Complete Guide for 2026
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The concept of a polystyrene kit pool is based on an innovative and modular approach, allowing everyone to easily build an in-ground polystyrene block pool. This concept combines ease of assembly, lightness, and strength, and stands out as an excellent solution for individuals and professionals seeking a durable and high-performing pool.
In summary:
- The polystyrene pool kit is a modular system composed of high-density polystyrene formwork blocks, offering a durable structure and integrated thermal insulation thanks to the reinforced concrete poured inside.
- This solution allows for quick assembly, excellent insulation, and controlled costs, ideal for individuals and experienced DIYers wishing to build a quality inground pool.
- This guide explains how they work, their benefits, the installation process, prices in 2026, and how they compare to other types of pools to help you make the best choice.
What is a polystyrene pool kit?
A polystyrene pool kit is a complete set for building the walls of an in-ground pool using high-density expanded polystyrene (EPS) formwork blocks. This material, known for its lightness, ease of handling, and insulating properties, is an effective and stable solution for pool construction.
These blocks form a permanent formwork that remains in place after the concrete is poured, ensuring both the structure and insulation of the pool.
The kit includes various products essential for the construction and maintenance of the pool, such as the filtration system, installation equipment, and accessories necessary for the performance and upkeep of the basin.
The components of the polystyrene kit
The standard kit includes several essential components for assembly:
- Insulated concrete formwork blocks: standard dimensions of 125 cm in length, 30 cm in height, and 25 to 30 cm in width. Each block incorporates two EPS faces (approximately 5 cm interior + 5 cm exterior) with a central 15 cm space for the concrete wall.
- Sealing parts: skimmer, main drain, return inlets, vacuum plate, LED spotlight. These elements are integrated during the assembly of the blocks.
- Liner hanging rail and finishing accessories: corner caps, hung profiles, protective felt.
- Filtration system and equipment: pump, sand filter, plumbing kit, fittings kit for the hydraulic circuit, and maintenance equipment. The composition of the kit and filtration elements varies according to the size of the pool (depth, length, shape), in order to optimize the customization and performance of the basin.
Difference from a traditional concrete pool
The polystyrene kit pool, also called polystyrene block pool, differs from traditional formwork in several fundamental ways. Unlike traditional concrete, which requires the construction of heavy formwork panels and then their dismantling, the polystyrene blocks simply interlock using a male/female stud system.
The lightweight nature of the blocks (density of 25 to 30 kg/m³) makes them exceptionally easy to handle without the need for lifting equipment. A standard block weighs less than 3 kg, making it much easier for one or two people to install.
This technical difference explains why many self-builders choose this solution: it is easier to construct while still providing a reinforced concrete structure of comparable strength.
How does a polystyrene pool kit work?
The construction principle is based on three complementary phases: assembly of formwork blocks, integrated reinforcement, and pouring of concrete, together creating a monolithic insulated structure.
The formwork block system
The blocks are assembled according to a specific protocol that ensures the stability of the structure:
- The blocks interlock using male and female tabs, without the need for mortar or a primer.
- The panels are installed in a staggered pattern to offset the vertical joints and ensure structural integrity.
- Arrows or markings on each block indicate the correct orientation (arrow pointing toward the center of the pool).
- End caps allow you to neatly finish rows and corners.
This simplified implementation allows two people to erect the walls of a family pool in just a few days.
Reinforcement and concrete pouring
The reinforcement constitutes the essential armature of the reinforced concrete structure:
- Vertical reinforcements: Ø10 mm round bars positioned every 25 to 30 cm.
- Horizontal reinforcements: Ø8 mm bars installed every 30 cm.
- Welded mesh to reinforce strategic areas.
The concrete used must comply with a dosage of 350 kg of cement per m³ (class C25/30), with a maximum consistency of S3. Pouring is often done in two passes for heights greater than 1.50 m, thus avoiding excessive pressure on the blocks.
For a 6x3 m pool with a height of 1.50 m, plan for approximately 7 to 8 m³ of total concrete (walls + slab concrete raft).
Integrated thermal insulation
Polystyrene offers outstanding thermal performance for a swimming pool:
- Thermal conductivity (λ): approximately 0.033 W/(m·K).
- Thermal resistance (R): up to 4.24 m²·K/W depending on thickness.
- Estimated heat gain: an additional 2 to 4°C in summer without active heating.
This insulation significantly reduces heat loss, extending the swimming season and lowering your energy bill if you use a heat pump or a heating system.
Pros and cons of a polystyrene pool kit
A balanced assessment will help you determine whether this solution is a good fit for your project and your skill set.
The main benefits
Choosing a polystyrene kit offers several practical benefits:
- Speed of assembly: the interlocking system considerably speeds up construction compared to traditional formwork.
- Integrated thermal insulation: heating savings and improved bathing comfort.
- Controlled cost: in self-building, labor costs are considerably reduced.
- Lightness and maneuverability: easy handling without lifting equipment.
- Customizable adaptability: the blocks are easily cut to create custom shapes with an integrated staircase.
- Durability: the reinforced concrete structure guarantees excellent solidity over time.
The main drawbacks and limitations
There are certain considerations that deserve special attention before getting started:
- Strict technical requirements: the reinforcement, the concrete mix, and the pouring must be perfectly executed, otherwise there will be cracks or infiltrations.
- No ten-year warranty: in self-build projects, the responsibility for the work falls on the individual.
- Required skills: solid knowledge of masonry and reinforced concrete is essential.
- Necessary protection: external blocks must be protected against rodents and roots.
- Liner-dependent waterproofing: the quality of the liner determines the final waterproofing.
Price of a polystyrene pool kit in 2026
Prices vary depending on size, equipment level, and model range. Here are the current price ranges observed on the French market.
Prices based on dimensions
| Pool type | Dimensions | Price of the complete kit |
|---|---|---|
| Mini pool | 3×2 m | €3,000 to €5,000 (including tax) |
| Family pool | 6×3 m | €4,000 to €10,000 (including tax) |
| Large swimming pool | 8×4 m | €6,000 to €15,000 (including tax) |
| Luxury pool | 10x4 m | €12,000 to €18,000 (including tax) |
Additional costs to expect
- Reinforced concrete (walls + slab): €800 to €1,500.
- Complete reinforcement: €300 to €600.
- Professional earthwork: €1,500 to €3,500.
- Pool coping and deck: €1,000 to €4,000.
What's included in the kit
| Items typically included | Items to be budgeted separately |
|---|---|
| Polystyrene formwork blocks | Concrete and Reinforcement |
| Liner (75/100) | Earthwork and Excavation |
| Filtration kit (pump + filter) | Foundation slab |
| Complete seal-in components | Labor as needed |
| LED floodlight | Coping stones and exterior finishes |
| Protective felt | Perimeter drainage |
| Basic electrical panel | Building permit or notice of construction |
Delivery of a polystyrene pool kit: details and tips
The delivery of your polystyrene pool kit is a crucial step for the success of your project. It is important to choose a supplier recognized for the reliability of its delivery service in order to avoid any delays.
The polystyrene blocks, as well as all sealing parts and accessories, are generally packaged on pallets. This facilitates handling as soon as they arrive on the construction site.
Before delivery, be sure to check the dimensions and total weight of the kit. This will allow you to make the necessary arrangements for unloading and storage.
Set aside a flat, dry, and easily accessible area to store the blocks and parts. Avoid prolonged exposure to moisture or the elements.
Upon delivery, carefully inspect the condition of the packages and each component to be installed (skimmer, return lines, vacuum inlets, etc.) before signing the delivery receipt.
If you notice any damage or missing parts, report it immediately to the carrier and the supplier. This will ensure a prompt response and prevent delays on the job site.
By planning ahead for delivery logistics and carefully inspecting each component, you can ensure a smooth start-up that meets your expectations.
Detailed steps for assembling a polystyrene block pool kit
The success of the project depends on strict adherence to each step. Here is the complete timeline with the critical milestones.
Phase 1: Preparing the Site
- Preliminary study: analyze the soil type (clay, sand, rock), the water table level, and site access for the delivery of concrete.
- Administrative procedures: file a prior declaration or a building permit depending on the surface area (mandatory for areas over 10 m²).
- Earthworks: excavate according to the interior dimensions plus the thickness of the blocks, with a slope for drainage.
- Slab preparation: install a compacted sand bed, the perimeter formwork, the welded mesh, and pour the concrete slab 12 to 15 cm thick.
Phase 2: Assembling the structure
- First row: lay the blocks on the perfectly flat slab and check for levelness.
- Staggering rows: work row by row in a staggered pattern, integrating the pieces to be sealed into the designated locations.
- Reinforcement: install vertical bars every 25-30 cm and horizontal bars every 30 cm.
- Top rail: attach the liner hanging rail and check the overall plumb of the structure.
Phase 3: Final touches and commissioning
- Concrete pouring: fill the cells in two passes if the height exceeds 1.50 m, vibrate to remove air bubbles.
- Concrete curing: observe a minimum drying time of 5 to 7 days.
- Liner installation: carefully install the protective felt and then the liner.
- Connections: connect the filtration system, the pump, and the electrical box.
- Backfilling: progressively backfill the exterior with sand or gravel.
- Filling: fill the basin and proceed with the initial treatments.
Expert advice: call on a professional pool builder for critical steps (reinforcement, pouring, liner installation) if you have no masonry experience.
Sealing Parts and Waterproofing: Ensuring the Longevity of Your Pool
The success of a polystyrene block swimming pool depends heavily on the quality and installation of the built-in components. These elements guarantee the watertightness and durability of the pool.
Components to be embedded, such as skimmers, return outlets, vacuum inlets, or spotlights, must be compatible with the polystyrene structure. This ensures they are compatible with the blocks and the liner.
During installation, strictly follow the manufacturer’s instructions for installing the components to be embedded. Use the accessories and gaskets provided or recommended.
Make sure to install the blocks precisely during assembly. Careful positioning and proper sealing are essential. This prevents water leaks or seepage that could damage the filtration system and the structure.
The quality of the materials is also very important. Choose durable components that can withstand water pressure and chemicals. This ensures the longevity of your pool.
Check the condition of seals and fittings regularly, especially during winterization or when bringing the system back online. This vigilance allows you to quickly detect any issues and take action before problems escalate.
By following these best practices and choosing high-quality components, you’ll maximize your pool’s watertightness and durability. You’ll also ensure that the filtration system operates smoothly and that your family can enjoy swimming for years to come.
Polystyrene Pool Kits vs. Other Types of Pools
This comparison helps you make the best choice based on your priorities and constraints.
Detailed comparison table
| Criterion | Polystyrene kit | Fiberglass pool | Traditional concrete pool |
|---|---|---|---|
| Structure pricing | €4,000 to €15,000 | €8,000 to €25,000 | €15,000 to €40,000 |
| Assembly time | 2 to 4 weeks | 3 to 5 days | 6 to 12 weeks |
| Thermal insulation | Excellent (built-in) | Variable (optional) | Needs to be added |
| Durability | Very good | Excellent (20-year warranty) | Excellent |
| Interview | A liner to watch | Easy-to-apply gel coat | Flooring in need of renovation |
| Warranties | Limited to self-build projects | 10-year builder's warranty | Decennale: So Professional |
| Required skills | Experienced Masonry | None (professional installation) | Expert Masonry |
| Personalization | Custom orders accepted | Predefined templates | Completely free |
Summary to help you choose
Opt for the polystyrene kit if: you have masonry skills, available time, a limited budget, and you enjoy manual labor.
Prefer the polyester shell if: you want a quick installation, a solid manufacturer's warranty, and to avoid the risks associated with self-construction, and if you are hesitating, for example, between a wooden pool and a shell pool.
Choose traditional concrete if: you want a completely custom shape and have a substantial budget with qualified professionals.
Why choose Aboral as an alternative to polystyrene kits?
If you wish to avoid the constraints of polystyrene kit assembly while benefiting from a quality in-ground pool, polyester shell pools represent a particularly attractive high-end alternative.
Benefits of the Aboral solution
Aboral pools, available through a network of specialized distributors, offer several distinctive advantages:
- Made in France: production entirely carried out in France with premium quality materials.
- 20-year warranty: extended coverage on the structure, far superior to the warranties of self-build kits.
- Installation in 4 days*: installation by trained professional teams, with no intervention required from you.
- Gel coat finish: smooth, aesthetic, and easy-to-maintain surface.
- No risk of faulty workmanship: the installers' expertise guarantees perfect implementation.
- After-sales service: complete support from project inception to maintenance.
This solution is particularly well-suited for homeowners seeking excellence without the technical uncertainties of building their own home.
Manufacturing and Installation Process for Aboral Pools
The Aboral industrial process, comparable to the key steps in building a polyester shell swimming pool, guarantees consistent quality and optimal performance.
Manufacturing steps:
- Mold design based on the selected dimensions and shapes.
- Application of gel coat layers for finishing and waterproofing.
- High-strength fiberglass and polyester resin laminate.
- Rigorous quality checks before delivery.
On-site installation process:
- Site preparation and earthwork.
- Delivery of the hull by crane truck.
- Placing and securing the hull in the excavation.
- Hydraulic and electrical connections.
- Simultaneous backfilling and filling with water.
- Finishing and commissioning.
The entire project takes about four days, compared to several weeks for a polystyrene kit.
How can you easily set up your pool with Aboral?
Aboral offers an intuitive online shell pool configurator to define your project in a few clicks.
Customization steps:
- Shape selection: rectangular, square, rounded shape.
- Dimension selection: length, width, and depth adapted to your land and use.
- Equipment options: stairs, submerged beach, LED lighting, roller shutter.
- Colors and finishes: several gel coat shades available.
An Aboral consultant will then work with you to refine the project, verify its technical feasibility, and plan the installation according to your expectations.
Good to know:
An approved safety device is required as soon as the watercraft is launched to ensure the safety of users.
The frost-resistant polystyrene blocks ensure the structure’s long service life, while their light weight allows for quick assembly, which typically takes 5 to 7 days, not including concrete curing time.
It is essential to protect the exterior walls before backfilling to ensure the pool remains intact. Waterproofing is provided by the liner, while filtration can be traditional or integrated, depending on your needs.
Thanks to its natural insulating properties, polystyrene helps reduce heating costs by maintaining a stable water temperature.
The polystyrene pool kit is an innovative and economical solution for a durable in-ground pool, provided you master masonry and reinforced concrete. For a turnkey, fast, and high-end alternative, Aboral offers polyester shell pools manufactured in France, combining quality, design, and professional installation. Choose the solution that best suits your project and enjoy a pool of excellence.
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You may be asking yourself these questions?
In 2026, an in-ground swimming pool will be subject to a development tax (one-time, upon installation) and property tax (annual). The housing tax will be permanently abolished for primary residences.
The national flat rate is updated annually by decree. In 2026, it will be €251/m².
No, for primary residences. The housing tax will be permanently abolished in 2026. For secondary residences, it may still apply in certain cases.
90 days from the completion of the work, on impots.gouv.fr. This deadline is mandatory: exceeding it will result in the permanent loss of any exemptions.
Yes, if your municipality has voted for a temporary two-year exemption for new buildings. You must submit your declaration within 90 days to benefit from this exemption.
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