Pool Replastering and Refinishing

Pool replastering, also called pool refinishing, means putting a new cement-based finish on the inside of a concrete pool. Most of the job looks the same from pool to pool. What decides whether the new finish looks good and lasts is a handful of technical choices: which finish you pick, whether the old surface is chipped out or bonded over, and how the water is handled during the first 30 days. This page goes deep on those. For the full job from start to finish, see our guide to pool resurfacing on the Treasure Coast.

Pool replastering versus resurfacing: the same job, different words

Contractors use replastering, refinishing, resurfacing and, in Florida, “re-marciting” more or less interchangeably. Strictly speaking, replastering refers to a traditional plaster finish, while resurfacing and refinishing are broader terms that also cover quartz and pebble. In practice, a quote with any of these words describes the same basic work: drain the pool, prepare the old surface, apply a new finish, refill and start it up.

What matters isn’t the word on the quote but the details under it: the exact finish, how the old surface will be prepared, and who handles startup. The process, access, timing and cost questions are covered on our resurfacing page. The rest of this page covers the parts that most affect the finish itself.

How long each finish lasts in Florida sun and water

Every cement-based finish wears in the same basic way: water that’s out of balance either dissolves the surface, which etches and roughens it, or deposits minerals on it, which leaves scale. Florida speeds both up. Warm water reacts faster, pools run year-round, and many use salt chlorine generators that push pH upward and have to be watched.

• White plaster (marcite) typically lasts somewhere between seven and fifteen years. It ages by getting rough, etched and grayish, and stains show clearly against it.
• Quartz aggregate generally lasts longer than plain plaster, because the quartz resists etching better than cement alone. As it ages, the color becomes less even and the surface slowly roughens.
• Pebble aggregate generally lasts the longest. It ages differently: rather than etching, individual stones can eventually loosen and come out, leaving small pits.

The spread within each finish is wide, and the biggest reason is water care, starting with the first month. A well-started, well-balanced plaster finish can outlast a poorly treated quartz one. So when you compare finishes, compare the contractor’s startup plan too.

Many contractors offer brand-name quartz and pebble lines, such as Diamond Brite, Pebble Tec and StoneScapes. If a specific product matters to you, ask whether the contractor installs it and whether it comes with a manufacturer warranty. For more detail, see our pages on quartz finishes and pebble finishes, our guide to how long pool plaster lasts, and our side-by-side comparison of the three.

Chip-out versus bond coat

Before a new finish goes on, the contractor has to decide what to do with the old one. There are two basic approaches, and the choice affects the price, the noise and mess of the job, and how long the new finish lasts.

Chip-out

A chip-out removes the old finish down to the concrete shell underneath, usually with pneumatic chipping hammers. It’s loud, dusty and labor-intensive, and it produces a lot of debris to haul away. The advantage is a clean start: the new finish bonds directly to the shell, any cracks or damage in the shell are exposed and can be repaired, and you’re not relying on an old layer that might fail later.

Bond coat

The alternative leaves the old finish in place. Loose areas are removed, the surface is cleaned and roughened, and a bonding layer is applied so the new finish grips the old one. Some contractors also water-blast the surface first to strip away anything weak. It’s faster, quieter and less expensive than a full chip-out.

The catch is that the new finish can only be as sound as the layer it’s attached to. If the old finish lets go of the shell later, it takes the new finish with it.

How contractors decide

• Is the old finish well bonded? The contractor sounds the surface once the pool is drained. Widespread hollow areas point to a chip-out, while a finish that’s sound throughout may be a candidate for a bond coat.
• How many layers are already there? Each finish applied over the last adds thickness. Eventually the returns, lights and drain end up recessed, and the waterline tile starts to look out of proportion. A pool that’s already been refinished over the top once or twice is usually due for a full chip-out.
• Does the shell need work? If there are structural cracks or other shell repairs to make, the old finish has to come off in those areas anyway. See pool repair for how those are handled.

Questions to ask

Ask which method the contractor plans to use and why, and how they’ll prepare the surface. Most importantly, ask what happens if the old finish turns out to be in worse shape once the pool is drained. A good quote says whether the job switches to a chip-out in that case and how the extra work will be priced. Chip-out versus bond coat is one of the biggest swings in what a job costs, which our guide to local resurfacing costs covers in more detail.

Startup and the first 30 days of water chemistry

The first month after the pool is filled has more influence on how a new finish looks and lasts than almost anything else, and it’s the part homeowners know least about.

Know what’s coming out of the hose

Most Treasure Coast utilities make tap water the same basic way: shallow well water is lime-softened, deeper Floridan aquifer water is treated by reverse osmosis, and the two are blended, pH-adjusted and disinfected with chloramines. The mix isn’t identical from one utility to the next, and some systems don’t blend at all — a few run on membrane-treated deep water alone. Which one you’re on depends on your address, not your city name.

That matters at startup because fresh plaster is still curing, and the water sitting against it in the first weeks affects how the surface sets. Softened and membrane-treated water carries less dissolved mineral than untreated well water, and water that runs short on minerals can draw calcium out of a new finish. Whether your fill water leans that way is something a test tells you — not something to guess from a chart.

A careful contractor tests the fill water and balances from those results. If yours doesn’t bring it up, ask. Your utility’s annual water quality report explains how your water is treated; it won’t tell you what to add to the pool, but it tells your contractor what they’re starting with. If you’re in Port St. Lucie, our Port St. Lucie page covers which utility serves which part of the city.

Why fresh plaster is vulnerable

Plaster, quartz and pebble finishes are all cement-based, and cement is rich in calcium. For its first weeks, a new finish is still curing. It’s softer than it will be, it’s chemically active, and it sheds a fine white dust into the water that has to be brushed and filtered out.

Water that’s low in calcium and alkalinity is what the trade calls aggressive: it tends to dissolve calcium from whatever it touches. Fill a newly finished pool with aggressive water, and it pulls calcium out of the fresh surface. The result can be etching, mottling and a rough or blotchy finish within the first few weeks, damage that’s permanent once it’s done. Water that swings too far the other way causes the opposite problem, with scale and cloudy deposits settling on the new surface.

Where your fill water comes from matters

How your water is treated before it reaches your hose affects how aggressive it is. Lime softening, which some utilities use, exists specifically to remove hardness from water. Reverse osmosis strips out nearly everything, calcium and alkalinity included. Water from either process can be very soft, which is pleasant for washing but tough on fresh plaster. Well water brings its own issues, since some wells carry dissolved metals like iron that can stain a new surface.

The practical takeaway: test the fill water before startup rather than assuming it’s neutral, and ask your contractor what they plan to do about calcium hardness and total alkalinity before and during the fill. A good contractor will already have an answer. If you’re in Port St. Lucie, our Port St. Lucie resurfacing page covers local considerations.

How startup is managed

Contractors balance startup water using a saturation index, a calculation that combines calcium, alkalinity, pH, temperature and dissolved solids to predict whether water will dissolve calcium from the finish or deposit it. The goal during startup is to keep the water from doing either. Methods differ. Some contractors raise alkalinity early, others manage pH more aggressively, and industry groups such as the National Plasterers Council publish startup procedures. What matters is that your contractor follows a defined method and can explain it.

A typical first month looks something like this:

• Fill day. The fill runs continuously, and the water is tested and adjusted as it fills or immediately after.
• The first week or so. Frequent brushing to lift the plaster dust, frequent testing, the pump running, and the filter cleaned as dust builds up.
• The rest of the month. Chemistry is brought gradually to its normal range, and brushing continues as long as dust keeps appearing.
• Held back until the contractor says so. Automatic cleaners, the pool heater, and adding salt for a salt chlorine generator. Many startup procedures delay each of these while the finish cures.

Get the startup plan in writing

Before signing, find out who handles startup, how many visits are included, whether chemicals are part of the price, and what you’re expected to do yourself, which usually means brushing. Ask whether the contractor keeps a written log of water tests during startup. Many finish warranties depend on startup being done properly, and a log is the evidence if a problem shows up later.

If you notice gray or white blotches, rough patches, cloudy water that won’t clear, or crusty deposits on the tile during the first month, call the contractor right away. Startup problems caught early are much easier to correct.

FAQs

What exactly is marcite?

Marcite is the traditional Florida name for white pool plaster, a mix of white cement and finely ground marble. It’s the classic bright-white finish that gives a pool its light blue water color.

Why is my newly plastered pool full of white dust?

That’s normal. A curing finish releases fine plaster dust for the first days to weeks. Regular brushing moves it into the water where the filter can catch it, so expect to clean the filter more often than usual during that time.

My new finish looks blotchy. Did something go wrong?

Maybe, maybe not. Some variation is normal, especially in colored finishes. But blotches that appear or spread during the first weeks can point to a startup chemistry problem or to the fill water. Call your contractor promptly rather than waiting to see if it fades.

Can I handle the startup myself?

Some homeowners do, but check your warranty first. Many contractors and finish manufacturers require startup to be done a particular way, sometimes by the contractor, and a DIY startup that goes wrong can leave you without coverage.

How many times can a pool be refinished over the old surface?

There’s no fixed number. It depends on how well each layer is bonded and how much thickness has built up. Once fittings start to sit recessed or the old layers show signs of letting go, a full chip-out is the better choice.

Get matched with a licensed contractor

Tell us about your pool and we’ll connect you with a licensed contractor serving your part of the Treasure Coast. When you talk to them, ask about chip-out versus bond coat and about their startup plan. You’ll know exactly what to listen for.