A concrete swimming pool provides many years of summer fun, but as the pool ages, the plaster coating wears thin and cracks develop. A crack in your swimming pool can be a frightening thing, but sometimes cracks are not structural and can be repaired easily. Calling a swimming pool repair professional to check the nature of the crack is the best way to know what type of repairs are needed. Here are some types of concrete pool cracks and how they're repaired.
Types Of Cracks You Might See In Your Concrete Pool
Cracks in plaster and concrete take on different forms. If the crack is structural, it will probably be deeper and longer than a typical cosmetic crack, but one way to tell is by doing a dye test. If you place food dye near the crack and the color is pulled toward the crack, that's a sign of a leak in the concrete rather than one that's confined to the plaster surface. Cracks in the plaster can appear any place in your pool and they can be fairly large and concerning, but these don't usually leak water.
Cracks in plaster can also take on a fine spiderweb appearance that you can barely see. These cracks are fairly common and may not need repairs since they are smooth to the touch and don't leak. Your pool can also develop thin plaster that doesn't necessarily show cracks, but is just worn down due to age. It's normal for water to continually seep through the plaster and through the concrete at a very slow rate. The plaster is applied to slow down the process of water loss and if the plaster gets thin, then water can leak through more quickly.
How Concrete Pools Are Repaired
Minor cracks in plaster can be repaired with patch kits. The patch can even be applied under the water so you don't have to drain the pool. If you have bigger cracks or if the plaster needs to be reapplied, then you'll have to drain your pool first. Also, draining makes it easier to repair cracks on the bottom of a deep pool. A structural crack can be repaired by injecting it with filler that seals and stabilizes the crack. Cracks in the plaster can be filled in too, but the pool repair professional will assess if filling the cracks is best or if the plaster is so old that it needs to be replaced.
Replacing the plaster is called resurfacing your pool and it will give your pool a fresh smooth finish that should last for many years. The resurfacing process covers cracks and imperfections so the pool looks like new.