Fibreglass Swimming Pools

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Fibreglass is fast becoming the most popular swimming pool lining material. This is largely due to the fact that it doesn't stain easily. Fibreglass has a very smooth or glassy finish and, if applied correctly, can last as long as marbelite .......... or longer. The main contributing factor to the longevity of a fibreglass lining is the tucking in of the top edge underneath the copings. Many fibreglass contactors don't bother with this and this will surely cause their fibreglass lining to delaminate within a relatively short period of time. A groove should be cut in under the copings and the fibreglass should get tucked in, after which it gets sealed off with bonding paste which is a special compound used to fill holes/dents/uneven areas on fibreglass.

The 2 types of fibreglass resins and gelcoats found are usually GP and Isopthalic. GP is general purpose resin or resin based products and is only suitable for repairing surfboards, motor cycle fairings, canopies, etc. whereas Isopthalic resin based fibreglass products are designed to be in water and the isopthalic gelcoat or topcoat is waterproof. The fibreglass structure is not waterproof. For this reason one should seriously consider either re-painting the existing fibreglass lining if it is salvageable, or re-line the pool, when the paint starts to flake off in areas or if the fibreglass develops holes in the structure.

As soon as the waterproof topcoat becomes compromised the fibreglass lining is no longer waterproof and water will most certainly be seeping through to the pool wall. This is a major problem in that this will start causing delamination of the fibreglass lining from the pool wall. This in turn creates other problems and will lead to cracking or tearing of the fibreglass structure. The problem will become compounded to the point where the fibreglass lining will need to be cut out in large areas and patched. This is always extremely difficult to repair perfectly since 2 pieces of fibreglass overlap and there's generally a seam where one can notice a patch.

Density of the fibreglass matt is another major issue in ensuring longevity of your fibreglass lining. Generally, the matt comes in 2 densities: 300g/m² and 450g.m² . The former is only suitable for use with GP resin based fibreglass products since it is not structurally as strong as the latter. 450g/m² fibreglass matt is the correct density to use in swimming pools since it is 50% denser and therefore much thicker and stronger than the 300g/m² matt.

Some fibreglass contractors use only GP resin and gelcoat with 300g/m² and this combination is absolutely detrimental to the longevity of a fibreglass pool lining. If having your pool fibreglassed, make very sure that the contractor is only using isopthalic resin based products and 450g/m² matt.

The beauty of fibreglass in pools is that algae and dirt can very easily be brushed or swept up and won't stain the fibreglass. This means the maintenance is slightly less than with marbelite. Also, marbelite becomes rough with age whereas fibreglass doesn't.

Fibreglass Swimming Pool by Rhino Pools

Fibreglass Swimming Pool by Rhino Pools