Composite outdoor pool - how to ensure durability
The advantages of a fiberglass pool over concrete, plastic or prefabricated pools are achieved by producing it according to the technology and application in the manufacture of high-quality materials. Hence, the resistance of such pools to the effects of ultraviolet radiation, water, soil pressure, the effects of chemical reagents. In essence, a composite (fiberglass) pool is a “layer cake” in which glass mat layers are bound by specific resins. Moreover, the quality of the pool and its strength strongly depends on the quality of the materials used in the manufacture of the pool.
The manufacture of a pool begins with a matrix, into which a pool is molded into layers. The first layer of the pool is a gelcoat - high-strength transparent enamel, which protects the pool from the effects of chemicals, water and ultraviolet. Under the gelcoat there is a layer of substrate - it is this layer that gives the pool its color.The substrate can consist of one element, then the pool will be monotonous, or contain impurities, which allows you to create granite colors or colors with sparkles.
Next come the layers of the "water barrier". In addition to giving the pool strength, their purpose is also to provide the pool with protection against its destruction by water. These layers, in a quality-made pool, are usually five. Moreover, in addition to polyester resin, which impregnates the majority of layers in the pool, two layers of vinyl ester resin are used.
As is known, only epoxy resin has the property of impermeability to water. Epoxy resin is part of both polyester and vinyl ester resin, however, there is more of it in the vinyl ester resin, this resin has greater resistance and better adhesion to the surface.
Two layers of glass mat, impregnated with a vinyl ester resin are located immediately behind the substrate with a color, followed by three layers of a composite with a polyester resin, which gives the pool the best waterproofing, strength and best connection between each other. Behind the "water barrier" is the main body of the bowl, its "bearing part" is 6 denser layers of glass fiber with polyester resin, which give the pool its strength.
The last layer in the pool - the topcoat - is also heavy-duty enamel, in which wax is added. This layer waterproofs the pool outside. The surface of the basin is absolutely smooth, which prevents the osmosis phenomenon, that is, water molecules cannot penetrate into its structure and start the destruction of the pool from the inside (which seriously affects concrete and plastic pools).
When a composite pool is produced using technology and using high-quality European materials, a quality, reliable product is obtained. Such pool will serve for many years, keeping the durability and appearance. However, deviation from technology and the use of cheaper materials does not allow to get the quality that a real composite pool can have.
Companies that save on materials generally neglect the quality of the resin - vinyl ester resin is not used at all, and the polyester resin contains less epoxy. Strength and resistance to water such leaves much to be desired, due to poor waterproofing and adhesion. Also, over time, pools of cheap materials can begin to "split".
This is due to the fact that cheaper resins do not give that connection to each other, as high-quality European ones. Delamination is manifested in the form of cracks on the gelcoat and the subsequent destruction of the pool with water. Repair of such a pool is quite expensive and unscrupulous producers, as a rule, blamed for such incidents of their customers, and not their desire to save money.
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