Polyester vs. concrete pools: a real comparison for an informed choice

Timeframe and installation predictability

A polyester pool is installed in 4 to 7 days for the structure by an official installer. The timeframe is less sensitive to weather conditions and can be contractually committed. A concrete pool built on-site requires 4 to 12 weeks depending on complexity, with unforeseen events linked to weather, team availability, and execution quality. This difference is especially relevant in projects where the pool is integrated into a larger renovation.

Long-term structural resistance

The main difference lies not in raw durability, but in the nature of long-term risks. A concrete pool built by assembly features construction joints that constitute potential weak points, especially in clay soils or regions with strong seasonal thermal oscillations.

A monobloc shell distributes loads homogeneously across the entire structure, without longitudinal structural joints. Mon de Pra backs each pool with a 20-year structural warranty.

Formal freedom and dimensions

Concrete pools offer total freedom of shapes, variable depths, and oversized dimensions. Polyester pools are limited by transport gauges (maximum width of approximately 4.5 m without special transport), but cover most residential needs. The Mon de Pra range includes models from 3×3 m (Clever) up to 11.70 m in length (Beach, Cover).

Total cost over 20 years

The initial cost of a polyester pool is generally lower than that of a concrete pool of equivalent surface area. However, it is the total cost over 20 years that truly differentiates both options: the ISO NPG gel coat surface of a polyester shell does not require periodic lining renovation, unlike the porcelain stone or liner of a concrete pool, which must eventually be replaced. Chemical consumption is also lower thanks to the non-porous surface of the gel coat.

For a project with standard dimensions and correctly prepared ground, a polyester pool generally offers a better balance between result predictability, total 20-year cost, and maintenance simplicity.

An above-ground pool is a non-inground structure (galvanized steel, resin, or wood) whose starting cost may seem attractive (€500 to €8,000). But this initial price comparison hides significant structural differences that make it unsuitable for a permanent family pool project.

Technical limitations affecting use

• Reduced durability: lifespan of 7 to 15 years depending on material and maintenance, compared to over 30 years for a polyester shell with ISO NPG gel coat

• No real estate value: an above-ground pool is a movable asset and does not contribute to the property's resale value

• Limited depth and comfort: standard models do not exceed 1.20 to 1.50 m in depth, without the possibility of comparable integrated equipment

• Degradable interior lining: PVC liners require replacement every 5 to 10 years and are sensitive to UV and tears

• Non-existent landscape integration: structure is completely visible, with no possibility of inground integration in most cases

Liner replacement, more demanding water treatment on a less resistant surface, and a lifespan two or three times shorter than a polyester shell: over 20 years, the real cost of an intensively used above-ground pool can exceed that of a polyester pool, without the structural advantages or associated real estate value.

For a permanent family pool project, an above-ground pool does not offer the same guarantees of durability, user comfort, and return on investment as an inground polyester pool.

Requirements for installing an in-ground swimming pool vary significantly by country and, in many cases, by region or municipality. There is no single European standard: each jurisdiction defines its own thresholds, procedures and timelines.

As a general orientation across the main European markets:

In France, pools between 10 and 100 m² require a prior works declaration (déclaration préalable de travaux) submitted to the local municipality. Pools exceeding 100 m² or with a fixed cover taller than 1.80 m require a full building permit (permis de construire). All in-ground pools must be equipped with a certified safety device to prevent drowning.

In Spain, requirements are governed by municipal planning regulations (PGOU). Most in-ground pools require either a prior communication or a building licence, regardless of size. Local planning rules may impose additional conditions on setbacks, materials and maximum coverage.

In Germany, most residential in-ground pools fall below the permit-free threshold of 100 m³ under the Model Building Code (Musterbauordnung). Individual federal states may apply stricter limits. A notification to the local building authority (Baumeldung) is advisable even for permit-free installations.

In all markets, protected zones (listed buildings, natural reserves, coastal or heritage areas) trigger additional requirements regardless of pool size.

Still have questions about your pool project? Get in touch now and an official Mon de Pra installer will carry out a preliminary site visit to assess your terrain and prepare a personalised quote.

Request your quote now