Most Colorado pools need resurfacing years before their owners expect it.
The Pool and Hot Tub Alliance puts standard plaster on a 7 to 15-year cycle, and hard mountain water plus repeated freeze-thaw seasons consistently push local pools toward the short end.
This guide covers how to tell whether your pool actually needs resurfacing or just better chemistry, which finishes survive mountain water, what each option costs, and why the first 28 days after the job determine how long the new surface lasts.
Does Your Pool Actually Need Resurfacing? Run This Check
Walk the pool and check each of these. Two or more means it is time for an assessment.
- Run your hand along the wall below the waterline. Smooth is fine. Gritty or sharp means the plaster has etched.
- Look for staining that survived your last two cleanings. Surface stains lift. Embedded stains do not.
- Check the waterline tile for scale buildup. White crust that returns after scrubbing signals ongoing calcium problems.
- Find any cracks, even hairline. In a freeze-thaw climate, small cracks do not stay small.
- Look for exposed aggregate or rough patches on steps and the shallow end. These wear first because of foot traffic.
- Note whether you are adding acid constantly to hold pH. Curing or degrading plaster drives pH up on its own.
If you checked two or more, the next section explains which of those are chemistry problems and which are structural.
Chemistry Fix or Resurfacing Job?
This is the question Marshall Foote, who handles construction design and sales at Colorado Pool + Spa Scapes, gets asked most.
“Early on, if the water has been out of balance and the surface is just starting to feel a little rough, correcting the chemistry and giving it time can stop it from getting worse,” he says. “But once the surface is genuinely gritty, sharp to the touch, that is calcium and cement paste that has already etched out of the plaster. No amount of balancing brings that back.”
| What you are seeing | Likely a chemistry fix | Likely a resurfacing job |
|---|---|---|
| Surface texture | Slightly rough in spots, recent change | Gritty or sharp underfoot, widespread |
| Staining | Lifts with brushing or a stain treatment | Survives repeated cleaning, embedded |
| Scale at waterline | Returns slowly, removable | Heavy buildup, pitting underneath |
| Cracks | None visible | Any visible cracking, even hairline |
| pH behavior | Holds with normal dosing | Climbs constantly no matter what you add |
If your pool sits mostly in the right column, chemistry is managing a problem it cannot solve. Our team can tell you which side of that line you are on before you spend another season on chemicals. Call us at 970.945.8775 and we will take a look.
Which Finish Holds Up Best in Mountain Water
| Finish | Installed cost | Typical lifespan | In Colorado hard water |
|---|---|---|---|
| Standard white plaster | $4,000 to $7,500 | 7 to 12 years | Softest, etches fastest, shortest cycle here |
| Quartz aggregate | Mid range | 12 to 18 years | Harder mineral resists etching and staining |
| Pebble aggregate | $10,000 to $20,000 | 15 to 25 years | Best freeze-thaw and calcium resistance |
Standard plaster carries the lowest installed cost, per PHTA contractor market data, but it is the finish most likely to need replacing on the short end of the range. Aggregate finishes cost two to three times more and last two to three times longer, which generally lowers total cost across a 25 year ownership window.
“In mountain water, I steer people toward an aggregate finish almost every time,” Marshall says. “It costs more up front, but it is not fighting the same losing battle against calcium that plain plaster is.”
One tradeoff worth knowing: aggregate finishes handle day to day chemistry swings better, but the startup chemistry immediately after installation has to be precise.
Why Waiting on a Crack Costs More
Cracks behave differently here than in mild climates. Water enters the crack, freezes, expands, and widens it every cycle.
“A hairline crack today is a wider crack next winter,” Marshall says. “By the time someone calls us because the crack finally looks bad, we are often looking at a bigger repair than if they had called at the hairline stage.”
What escalation looks like:
- Year one: hairline crack, cosmetic, repairable in isolation
- Year two or three: crack widens, water reaches the bond coat behind the plaster
- Year four or beyond: delamination, plaster separating from the shell in sections, full resurfacing regardless of how minor it started
If your pool showed early cracking at this spring’s opening, this is the season to act rather than watch it through another winter. Request an assessment through our contact page and we will tell you whether it is a repair or a resurfacing.
Resurfacing, Renovation, or Rebuild
Not every aging pool needs the same intervention, and matching the fix to the problem avoids both overspending and under-fixing.
- Resurfacing replaces the interior finish only. The shell, plumbing, and equipment stay untouched. This is the standard 10 to 15 year intervention on concrete pools.
- Renovation covers the surface plus tile, coping, or equipment replacement. The right call when several systems are reaching end of life at once.
- Rebuild applies when the shell itself is structurally compromised. At that point the conversation shifts toward new construction rather than stacking repairs on a failing structure.
The First 28 Days Decide How Long It Lasts
The job is not finished when the crew leaves. According to the National Plasterers Council, roughly 86 percent of the cement in new plaster cures within the first 28 days, and the surface stays highly reactive to water chemistry that entire time.
What the curing window requires:
- Continuous filtration for the first several days, so plaster dust does not settle unevenly
- Brushing twice daily for the first two weeks to clear that dust
- Daily chemistry monitoring, not a one time balance, because calcium, pH, and alkalinity all rise on their own as the plaster hydrates
- Correct adjustment order: alkalinity, then pH, then calcium, the same chemistry sequence used at a normal opening
Skip that window and you get scaling, pitting, or gray streaking baked into a surface that is only weeks old, in a climate that was already working against it.
How Colorado Pool + Spa Scapes Handles Resurfacing
Most of our resurfacing conversations start as a maintenance call. Someone notices the texture changed or a stain will not lift, and our maintenance team flags it before it becomes a bigger problem.
Our construction and renovation team handles the resurfacing itself: finish selection, the chip out and reapplication, and the full curing period chemistry, because a botched startup after a good resurfacing job wastes the whole investment. Because it is the same company, the technician who has serviced your pool for years is often the one recommending the fix, not a stranger seeing it for the first time.
Ask a Technician: Pool Resurfacing in Colorado
What are the top three signs a pool needs resurfacing?
Texture, staining, and cracking, in that order of how often I see them. Texture is the big one, if the surface goes from smooth to gritty or sharp, that is etching and it does not come back on its own. Staining that will not lift with normal cleaning usually means it has worked into the plaster itself. And cracking, even small hairline cracks, matters more here than people expect because of our winters. Any one of those on its own is worth a look. Two or three together and you are almost certainly looking at a resurfacing job.
Is gritty plaster a resurfacing job, or a chemistry fix?
Depends how far along it is. If the water has just been out of balance for a bit and the surface is only starting to feel slightly rough, fixing the chemistry can stop it before it gets worse. But once it is actually gritty, sharp under your feet, that is calcium and cement paste that has already etched out. Chemistry cannot put that back. If you are not sure which one you are dealing with, that is exactly the kind of thing worth having someone look at rather than spending months on chemicals that were never going to fix it.
Which finish holds up best in mountain water?
Standard white plaster is the cheapest option and honestly the worst fit for our water. It is soft, and it etches fast against the calcium hardness we deal with here. I steer most people toward a quartz or pebble aggregate finish instead. Pebble especially holds up against the freeze-thaw wear that plain plaster shows first. If someone is resurfacing anyway, that is usually the moment to make the upgrade, because you are already paying for the labor either way.
Should you wait for cracks to resurface, or does that cost more?
Waiting almost always costs more. A hairline crack today is a wider crack next winter, because water gets into it, freezes, and pushes it open a little further every cycle. Worst case, water working behind the plaster long enough causes delamination, where sections start separating from the shell, and that is a full resurfacing project no matter how small the crack started out.
Frequently Asked Questions
How often does a pool need resurfacing in Colorado?
Standard plaster typically needs resurfacing every 7 to 15 years according to the Pool and Hot Tub Alliance, and Colorado’s hard water and freeze-thaw cycles push local pools toward the shorter end without active calcium hardness management. Aggregate finishes generally extend that window.
What does gritty pool plaster mean?
Gritty or sharp feeling plaster means the surface has etched from imbalanced water chemistry, most often high calcium hardness combined with low pH or alkalinity. Once texture has changed, chemistry manages the water but does not restore the surface.
What is the best pool finish for hard water areas?
Quartz and pebble aggregate finishes outperform standard white plaster in hard water because the aggregate resists etching and staining. They cost roughly two to three times more upfront and typically last two to three times longer.
Can a small crack in a pool wait to be repaired?
Not safely in a freeze-thaw climate. Water enters, freezes, and expands the crack each winter. Left long enough, water behind the surface causes delamination, turning a small repair into a full resurfacing job.
How long does new pool plaster take to cure?
Roughly 86 percent of the cement cures within the first 28 days per the National Plasterers Council, though full maturing continues for months. That window needs continuous filtration, twice daily brushing, and close chemistry monitoring since calcium, pH, and alkalinity rise on their own as the plaster hydrates.
