Lifespan by finish
These are typical industry ranges, not replacement deadlines: water care and the first month after filling matter. For example, white plaster from around 2012 is due for inspection now; quartz may have a few years left, while pebble is usually only halfway through its life.
| Finish | Typical lifespan | What usually wears it out |
|---|---|---|
| White plaster (marcite) | 10–15 years | Etching from low-pH or low-calcium water, staining, roughness |
| Quartz plaster | 12–20 years | Same as plaster, but the quartz aggregate resists etching longer |
| Pebble / exposed aggregate | 15–25+ years | Scale build-up, loose stones, cement wearing back around pebbles |
Age is a planning number, not a verdict. Plaster can be rough and blotchy at 8 years or still smooth at 16. The finish comparison goes deeper on what each surface costs and how it feels underfoot.
Why Colorado pools can wear faster
Front Range pools face three things coastal pools mostly don't: strong high-altitude UV, fast evaporation in dry air, and repeated freeze–thaw cycles. Each one chips away at the high end of those lifespan ranges.
- UV at altitude. UV intensity rises roughly 10% for every 1,000 meters of elevation, and Denver sits at about 1,600 meters. Stronger UV burns off chlorine faster, which tempts owners to shock harder and more often, and big chemistry swings are hard on plaster.
- Evaporation and hard water. Colorado's dry air pulls water out of a pool quickly. Every inch you top off leaves its minerals behind, so calcium hardness and total dissolved solids climb over a season. High calcium shows up as scale, grey-white crust at the waterline and rough patches on the floor.
- Freeze–thaw. Water expands about 9% when it freezes. Any water that seeps into a crack, a hollow spot or the joint behind the tile line expands each time the temperature drops below 32°F. A Denver winter swings above and below freezing many times, so small defects get bigger every year. Our freeze–thaw guide covers this in detail.
Water balance matters more than the calendar
A pool kept within a balanced Langelier Saturation Index (LSI) of roughly −0.3 to +0.3 will usually outlast one that isn't by years. LSI combines pH, total alkalinity, calcium hardness, temperature and dissolved solids into one number that says whether water will dissolve plaster or deposit scale on it.
- Negative LSI (aggressive water) pulls calcium out of the plaster. The result is etching: a rough, sandpaper surface and a finish that looks blotchy or washed out.
- Positive LSI (scaling water) drops calcium carbonate onto the surface. In Colorado, where evaporation raises hardness, this is the more common problem.
General targets for plaster pools are pH 7.4–7.6, total alkalinity 80–120 ppm and calcium hardness around 200–400 ppm, adjusted together so the LSI stays near zero. Testing weekly in season, and checking calcium monthly, does more for your surface than any product on the shelf.
How the first 28 days set the clock
A plaster finish keeps hardening for weeks after the pool is filled, and how it is treated in roughly the first 28 days has a big effect on how long it lasts. New plaster releases calcium dust as it cures, and that dust has to be brushed off and the chemistry kept steady.
- Brush the whole surface at least twice a day for the first week or two, so plaster dust doesn't settle and bond as scale.
- Test and adjust daily during startup. New plaster pushes pH up, and high pH plus high calcium is a recipe for early scaling.
- Follow the startup method you're given for when to add chlorine, salt and heat, and when to run an automatic cleaner. Different finishes and startup methods have different rules.
A poor startup is one of the most common reasons plaster looks tired years ahead of schedule. Our process page explains how we hand off a fresh finish.
Acid washing stretches it, but only so many times
An acid wash removes a thin layer of plaster to expose a cleaner layer underneath, which can buy a stained but sound surface a few more seasons. Because it takes material away each time, a plaster finish can only be acid washed a limited number of times before it is too thin.
Acid washing makes sense when the surface is smooth but stained, for example after an algae bloom or a season of metal staining. It does not help when the plaster is rough, chalky, delaminating or worn to the gray shell. In those cases you are paying to remove plaster you'll soon need to replace anyway. If you're weighing the two, our draining and acid wash page explains when we recommend it and when we'll tell you to save the money.
Age alone isn't the trigger: watch for these signs
Condition, not birthday, tells you it is time. If you see two or more of the following, get an inspection regardless of the pool's age:
- The surface feels rough enough to scrape feet or snag swimsuits.
- Stains come back within weeks of treatment.
- You can see gray or dark patches where plaster has worn through.
- Tapping the floor or walls finds hollow-sounding spots.
- Cracks keep widening each spring.
- The pool loses water faster than normal evaporation would explain.
We walk through each of these in 7 signs your pool plaster is failing. Hollow spots and cracks should be repaired before resurfacing; see crack and hollow-spot repair.
A simple timeline for a Colorado pool
For a typical white-plaster pool on the Front Range, a realistic life looks like this. Quartz and pebble follow the same pattern, just stretched out.
- Month 1: Careful startup, daily brushing and testing.
- Years 1–5: Weekly testing, monthly calcium checks, a proper winter closing each fall.
- Years 5–10: Watch for staining and early etching. An acid wash may make sense once.
- Years 10–15: Expect roughness, staining and worn spots. Plan a resurface.
When you're in that final window, plan the timing as carefully as the finish. Plaster needs temperatures of about 50°F and up to cure well, so Denver resurfacing runs roughly April through October, and spring slots book early. Our post on when to book pool resurfacing in Denver explains the calendar.
What resurfacing costs when the time comes
Replastering a typical Denver-area residential pool typically runs $8,500–$11,500 for white plaster, $10,000–$13,500 for quartz and $14,000–$20,000 for pebble. Ranges are estimates for the Denver metro, not a quote. Your written estimate sets the price. Size, repairs and tile or coping work move the number most.
The pricing guide breaks down what drives cost, and if you'd like a number for your own pool, send a few photos for a free estimate or call (303) 952-8700. We'll tell you plainly whether your surface needs resurfacing now, an acid wash, or just a few more years of good water care.