One-time service
New Plaster Start-Up in Los Angeles
Replastering is the expensive part. The four weeks straight after it are the part that decides whether the money was well spent.
Replastering is the expensive part. The four weeks after it decide whether the money was well spent. A plaster finish is generally expected to last fifteen to twenty years, and almost everything that shortens that — streaking, spotting, a surface like sandpaper underfoot — is set in the first twenty-eight days, while the plaster is still curing.
A start-up is not a series of visits. It is a fixed programme: seven days of daily attention, then three more weeks of close chemical control, no salt until day 28 and nobody in the water for the first 14.
Why the first month is different from every other month
New plaster is still chemically active when the pool is filled. It gives off calcium and pushes pH upward, hard, for weeks. Left alone, one of two things happens and both are permanent.
If the water goes scale-forming, calcium leaves solution and deposits on the new surface as blotching and hard white spotting. If it goes aggressive — low calcium hardness, low alkalinity, pH allowed to fall — it takes calcium out of the plaster instead, etching it rough and porous. A porous surface holds algae and stains for the rest of its life.
The window is narrow because the plaster hardens as it goes. Correct the water on day three and the surface is fine. Correct it on day thirty and it has already recorded what happened.
What a bad start-up leaves behind
- Streaking and mottling
Uneven colour, worst on dark finishes, where the shade varies patch to patch and cleaning never evens it out.
- Scale spotting
Hard white deposits sitting proud of the surface, from calcium that left the water instead of staying in it.
- Roughness
An etched, sandpaper floor and steps — uncomfortable to walk on and permanently easier to stain.
- Early loss of the finish
The expensive one. A surface started badly can need replastering years early.
The twenty-eight day schedule
What happens, when, and what is not allowed to happen yet.
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Days 1–7 — the active phase
Every day, not most days. Calcium hardness is held at 200–400 ppm, pH at 7.2–7.6 and total alkalinity at 80–120 while the fresh plaster keeps pushing against all three. The whole surface is brushed with a nylon brush daily, and vacuumed with a bristled vacuum head.
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Day 7 — filter clean and handover
A week of plaster dust ends up in your filter. It is cleaned out at the end of the active phase, and normal weekly maintenance restarts from there.
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Days 8–28 — the three weeks nobody talks about
The part that separates a start-up from a first visit. Chemistry stays under close control and the bristled vacuum head stays on. The plaster is still curing, just more slowly than in week one.
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Day 28 — salt, if it is a salt pool
Salt goes in after 28 days, not before. Adding it early puts a chloride load on a surface that has not finished hardening, and a salt cell fighting fresh plaster chemistry is an argument you do not want in month one.
And nobody swims for the first 14 days. This is the rule people push hardest against, because the pool looks finished on day three. Swimmers stir up plaster dust, disturb a surface that is still soft and move the chemistry you have spent a week stabilising. Two weeks out of a twenty-year finish is a good trade.
The three readings that matter most
Everything else is monitored, but these are what the surface is reacting to.
| Reading | Target during start-up | Why it matters on fresh plaster |
|---|---|---|
| Calcium hardness | 200–400 ppm | Plaster is a calcium surface. Water low in calcium takes what it needs out of the wall; water too high deposits it back as scale. |
| pH | 7.2–7.6 | Curing plaster drives pH up continuously. High pH scales the new surface, low pH eats it. The reading that needs watching most often. |
| Total alkalinity | 80–120 ppm | The buffer. In range, pH moves slowly and can be corrected. Out of range it swings between both failure modes in a day. |
Why the brush is nylon, and why it is daily
Fresh plaster sheds a fine loose layer as it cures — plaster dust. Brushing knocks it into suspension so the filter can take it out. Leave it and it settles, then cements back down as rough patches that are part of the finish from then on.
Nylon, because a steel brush scores a surface that is still soft and can leave rust marks. Daily, because the shedding is fastest in week one and a day skipped is a day the dust spends settling.
And why a bristled vacuum head, not a roller
A wheeled head puts its weight on a few small contact points and rolls them across plaster that has not hardened. That leaves tracks — faint lines across the floor, visible for years, that cannot be cleaned off because they are not dirt.
A bristled head spreads the load across its whole footprint. It is slower to push around, and that is the entire cost of avoiding the problem — which is why it stays on for all four weeks, not just the first.
Who books a start-up
- After a replaster
The usual case. The plasterer leaves, the pool is filling, and the twenty-eight day clock has already started. This is the point to call — not after the first week.
- After an acid wash with a full drain
An acid wash takes off the top layer of plaster and refills the pool with fresh, unbalanced water against a newly exposed surface. It is a smaller version of the same problem and wants the same discipline afterwards.
We do not replaster or resurface pools — that is a builder’s job. We take over once the plaster is on the wall. See how the start-up fits with our other services.
And then it becomes an ordinary pool
At the end of the programme the finish is cured, the chemistry is stable and the pool is on a normal weekly route — the same chemical panel, brushing, baskets and equipment inspection every other pool gets.
That is the goal. A start-up done properly is invisible.
A replaster is also the moment tired equipment stops being ignorable. If something on your pad is already marginal, deal with it now rather than in week two — equipment repair.
Questions people ask about new plaster
How long before you can swim in a newly plastered pool?
Fourteen days. The pool looks ready long before that, which is exactly why the rule gets broken. Swimming in the first two weeks stirs settled plaster dust back across a soft surface and knocks the chemistry off at the point in the cure when it matters most. The damage is cosmetic, permanent and easy to avoid.
When can salt be added to a new plaster pool?
After 28 days, once the cure is complete. Until then the pool runs as a chlorine pool and the salt system stays off. The cell is checked at the changeover; if it needs attention, that is salt system work rather than start-up work.
Why does new plaster need brushing every single day?
Because it is shedding calcium every day of that first week. Brushing lifts the loose material so the filter removes it. Skip a day and it settles and bonds, and what was dust becomes texture. Once bonded, brushing will not lift it — you are into acid washing plaster that is a week old.
Can I run the start-up myself?
Yes, in principle. It needs a reliable test kit, a daily hour for a week, the right brush and vacuum head, and the willingness to keep going through days eight to twenty-eight when the pool already looks finished. Most people manage week one and stop — and the finish quietly ends up worse than it should have been.
What does a plaster start-up cost?
It is quoted on the pool, because a four-week programme scales with volume and with how far the water is from target on day one. Members get 20% off individual services, which on a job this long is worth more than a month of weekly service. Published Los Angeles pricing is on the cost page; the communities we cover are on the service areas page.