Pool replastering in Phoenix, without the guesswork.

Replastering or resurfacing?

They mean nearly the same job. Replastering usually means a new white plaster or quartz plaster coat. Resurfacing covers any new interior finish, pebble included. Either way, the old surface is prepped and a new one goes on.

How a replaster week usually goes

1. Drain. The pool is pumped out under your city's rules. At the common 12 gallon a minute limit, a 15,000 gallon pool takes most of a day.
2. Prep. The crew opens the hydrostatic relief valve so groundwater can't push up the empty shell. Then the old surface is chipped out, or gets a bond coat so the new one sticks.
3. Tile and repairs. Cracks are patched, and new waterline tile goes on now if you are replacing it.
4. Plaster. The crew trowels on the new finish in coats, with drying time between them.
5. Refill. Water goes back in right away and runs without stopping until the pool is full, with nobody in the pool.
6. Startup. Brushing and water chemistry over the next 28 days shape how the new surface wears.

Phoenix drain rules and local details

What Phoenix does to plaster

Phoenix tap water runs 172 to 302 mg/L of hardness, or 10 to 17.6 grains per gallon, per the city's 2025 report. The National Plasterers Council recommends keeping calcium hardness at 200 to 400 ppm for plaster, so Valley fill water starts near the top of that range. Then evaporation pushes it higher: Mesa estimates a 400 square foot pool loses about 19,664 gallons a year, and the minerals stay behind. That's why scale builds fast here and why steady water balance matters more than anywhere else.

Timing matters too. Phoenix-area builders report a spring rush starting around March, with more open dates from December to February. In summer, crews start early because heat shortens how long plaster stays workable, and the empty shell shouldn't sit dry: one industry guide says never leave plaster without water for more than about a week.

What a replaster costs

In the Phoenix area, white plaster typically runs about $4,000 to $8,000 and quartz about $7,000 to $10,000 for an average backyard pool. Draining and cleaning adds roughly $600 to $650 in national cost guides, and a hose refill usually runs $100 to $250 in the Phoenix metro. Size, prep and tile move the number, so an on-site measurement is the only price to plan around.

See the full cost guide

The first 28 days

The National Plasterers Council, the plastering trade group, publishes a startup procedure for new plaster. Ask your contractor which startup they use. The main points of the NPC's:

1. Fill without stopping. Fill as fast as possible, with nobody in the pool.
2. Run the pump. Keep the filter running continuously for the first 72 hours at least, and ideally a week.
3. Brush every day. Brush at least twice a day for the first three days, daily through day 7, then as needed through day 28.
4. Hold the chlorine. No chlorine for the first 48 hours, then bring calcium hardness to at least 200 ppm by day 4.
5. Park the robot. No wheeled automatic cleaner for 28 days, and no heater until the water is balanced and the plaster dust is gone.

Check the license class, not just the license

Arizona's Registrar of Contractors (ROC) licenses pool work by class. A B-5 (residential pools and spas) or KA-5 license covers building and repairing pools, and R-36 plastering covers pool interiors, excluding tile. An R-6 pool service license does not allow a complete replacement of a plaster or pebble interior, so a service company can't legally do a full replaster.

Look up the license number and class on the ROC's contractor search before you sign. Hiring a licensed residential contractor also gives you access to Arizona's Residential Contractors' Recovery Fund, which can pay up to $30,000 per homeowner if a licensed contractor doesn't finish the job.