Warning Signs It’s Time to Resurface Your Pool
Pool surfaces don’t last forever. Plaster, quartz, and pebble finishes all wear down over time from water chemistry, sun exposure, and general use. The question most homeowners face isn’t whether their pool will eventually need resurfacing; it’s recognizing when that time has actually arrived.
Some signs are obvious. Others are easy to dismiss as minor cosmetic issues until they’ve caused more serious damage. Here’s what to look for, what each sign actually means, and how to gauge how urgently you need to act.
Sign 1: Peeling or Flaking Plaster
Peeling plaster (technically called spalling) is one of the clearest indicators that a surface has reached the end of its life. It typically appears as thin layers lifting or flaking off the pool floor, steps, or walls, often leaving an uneven, pockmarked texture beneath.
Spalling is usually the result of prolonged water chemistry imbalances, particularly low pH or low calcium hardness, which cause the water to become aggressive and essentially eat away at the plaster surface from the inside out. Once a plaster surface begins to delaminate, the process accelerates, water gets behind the compromised layer, and the flaking spreads.
Unlike a surface stain or minor roughness, peeling plaster can’t be patched in any meaningful way. Spot repairs will be visible and won’t address the underlying chemistry-driven degradation happening across the rest of the surface. A full resurface is the appropriate response.
Urgency level: High. Delaying makes the underlying gunite shell more vulnerable and increases the scope of prep work required when you do resurface.
Sign 2: Persistent Staining That Won’t Respond to Treatment
Some pool staining is normal and treatable; algae blooms, leaf tannins, and minor mineral deposits can usually be addressed with targeted chemicals or a light acid wash. The staining that signals a resurfacing need is different: it keeps coming back, resists treatment, or has permanently changed the surface color in irregular patches.
This type of staining typically happens when the surface has become too porous to hold a uniform finish. Minerals like copper and iron bond with aged plaster at a molecular level, and calcium deposits can form just below the surface rather than on top of it, making them impossible to remove without removing the surface itself.
Mottled or blotchy coloration that wasn’t there when the pool was new, and that hasn’t responded to multiple treatment attempts, is a reliable sign that the finish is compromised rather than just dirty.
Urgency level: Moderate. Persistent staining is primarily cosmetic at first but usually accompanies other signs of surface degradation. Worth evaluating the full surface condition when you notice it.
Sign 3: Rough or Abrasive Texture
A pool surface should feel smooth underfoot. When plaster or aggregate finishes begin to erode, the surface develops a rough, sandpaper-like texture that scratches skin, snags swimsuits, and makes the pool generally unpleasant to use.
The roughness comes from the cement matrix in the plaster breaking down while the harder aggregate particles (sand, quartz crystals, or pebbles, depending on the finish type) remain. What you’re feeling when you run your foot across the floor is the exposed tips of those harder particles with the surrounding cement worn away.
Rough texture tends to be most pronounced in high-traffic areas, first steps, the shallow-end floor, and around fittings, and then spreads across the rest of the surface as the finish continues to erode.
Beyond swimmer comfort, rough surfaces provide more area for algae and bacteria to colonize, leading to higher chemical demand and more frequent cleaning.
Urgency level: Moderate to high. Rough texture on stairs and shallow areas is a safety issue. Once roughness has spread across most of the pool floor, resurfacing is overdue.
Sign 4: Visible Cracks
Cracks in a pool surface need to be distinguished by type before determining the appropriate response.
Surface cracks (in the plaster only): Fine, shallow cracks that don’t extend through to the gunite shell beneath. These are common in aging plaster and are addressed as part of a standard resurface. The surface is removed, any damage to the shell is repaired, and a new finish is applied.
Structural cracks (through the gunite shell): Wider cracks, often with slight displacement or separation on either side, that indicate movement in the pool shell itself. These require structural repair before any resurfacing work and may involve filling and reinforcing the crack from the inside, or in some cases exterior waterproofing work.
The distinction matters because a structural crack that gets plastered over without being repaired first will telegraph through the new surface within months. A reputable contractor will identify structural cracks during the initial assessment and include the repair in the scope of work.
If you’re seeing cracks at fittings, around return inlets, main drain covers, or light niches, those are particularly worth paying attention to, as fittings are common leak points even when the rest of the shell is sound.
Urgency level: Variable. Surface cracks can be addressed on a normal resurfacing timeline. Structural cracks, especially those showing displacement or associated with water loss, should be evaluated promptly.
Sign 5: Unexplained Water Loss
All pools lose some water to evaporation, especially in Southern California’s warm, dry climate. The standard benchmark is up to a quarter inch per day during hot or windy weather. If you’re consistently losing more than that, or refilling the pool more frequently than you used to, the surface may be a contributing factor.
Aged, cracked, or porous plaster can allow water to seep through at a rate that exceeds normal evaporation, particularly at fittings, seams, or where structural cracks have developed. The bucket test (described in detail in our pool leak detection guide) is the most reliable way to separate evaporation from an actual leak without professional equipment.
It’s worth noting that water loss through a compromised surface is usually a slower, more diffuse process than water loss through a specific plumbing or fitting leak. If your pool is dropping a half inch or more per day, the cause is more likely a discrete leak than general surface porosity, and that warrants a professional leak-detection service rather than just a resurface.
Urgency level: High if accompanied by visible cracks or by a bucket test confirming loss beyond evaporation. Address promptly to prevent foundation and decking damage.
Sign 6: Swimmer Discomfort or Minor Injuries
When pool users start getting scratched feet, abraded elbows, or rashes, the surface is the first thing to investigate. A worn plaster surface that’s developed a rough aggregate texture can cause real skin irritation, especially on children who spend a lot of time in the shallow end.
Beyond general roughness, chipped edges around cracks or at fittings can catch skin, causing cuts rather than abrasions. Steps and the entry area are the most common culprits since they get the most contact.
This sign is worth acting on quickly, both for obvious safety reasons and because a surface that’s causing physical irritation has usually progressed well past the early cosmetic signs listed above.
Urgency level: High. Swimmer safety takes priority.
Sign 7: Faded, Discolored, or Uneven Finish Appearance
This one is more nuanced, because surface appearance is partly a matter of preference. But there’s a difference between a pool that looks dated and one whose finish has structurally degraded.
A finish that was once a consistent color but now shows blotchy, uneven areas, lighter in some spots, darker in others, with no discernible pattern, usually reflects uneven surface erosion rather than just fading. This is particularly common in white plaster pools that have gone through multiple chemical treatment cycles.
Pools in Southern California also deal with high UV exposure year-round, which degrades pigments in colored plaster and quartz finishes over time. If the color has shifted significantly from what was applied, or if the finish looks dull and chalky even when the water is clean, the surface is telling you it’s had enough.
An old but otherwise intact surface can sometimes be refreshed with an acid wash, which removes the top layer of oxidized plaster and calcium buildup to reveal cleaner material underneath. This buys time on a surface that’s aging but structurally sound. It’s not a substitute for resurfacing when the underlying finish is genuinely worn through.
Urgency level: Low to moderate on its own. If appearance is the only issue, an acid wash evaluation makes sense first. If it accompanies other signs on this list, factor it into a resurfacing timeline.
Sign 8: Sharply Increased Chemical Demand
Pool chemistry is a balancing act, and some variation in chemical usage from season to season is normal. What’s worth paying attention to is a sustained, significant increase in how much chlorine, pH adjuster, or algaecide you’re using to maintain the same water conditions as before.
An aging, porous plaster surface contributes to this in two ways. First, the surface itself can leach calcium and other minerals into the water, constantly pushing chemistry out of balance and requiring correction. Second, a rough or pitted surface gives algae and bacteria more surface area to colonize, which means your sanitizer has to work harder just to keep up.
If your chemical usage has increased noticeably over one or two seasons without a clear explanation (a change in water source, a significant algae event, new bather load), it’s worth having the surface condition professionally assessed.
Urgency level: Moderate. Elevated chemical demand rarely occurs in isolation; by the time it’s noticeable, other signs on this list are usually present as well.
How Long Should a Pool Surface Last?
The honest answer depends on the finish type and how well the water chemistry has been maintained:
White plaster: 7–12 years on average. More vulnerable to chemistry-driven erosion than aggregate finishes. Pools with chronically low pH or calcium hardness may see significant deterioration in as few as 5–7 years.
Quartz aggregate: 12–18 years. More resistant to staining and chemical erosion than plaster.
Pebble finishes (PebbleTec and similar): 15–25+ years. The most durable option. High-quality pebble finishes, combined with well-maintained water chemistry, can last significantly longer.
These timelines assume normal use and reasonably consistent water chemistry. Pools that have been neglected, that have experienced significant chemical imbalances, or that were surfaced with lower-grade materials may reach these thresholds earlier.
When You Notice Multiple Signs at Once
Individual signs can sometimes be monitored for a season before acting. But when you’re seeing multiple items from this list at the same time, rough texture plus persistent staining plus increased chemical use, for example, that combination usually indicates a surface that’s past the point where waiting makes economic sense. Each additional season on a deteriorating surface increases the prep work required and the risk of underlying damage that needs to be addressed before a new finish can be applied.
If you’re in Orange County or the surrounding area and want a professional assessment of your pool’s surface condition, Alan Smith Pools offers free on-site evaluations. With over 35,000 completed pool projects since 1981, their team can tell you exactly what you’re looking at and what your options are.
