First step is to drain the pool & spa. We don’t recommend doing this through the backwash as it could back up into the house. Proper way is to use a sump pump. This one has a float that shuts off the pump when the water is gone.
Here are some signs of “copper plate” on the plaster. This is caused metals in the water generally from using a copper or silver algaecide (not recommended for in ground gunite pools with plaster) or from low ph over a long period of time breaking down the copper heat exchanger in the heater.
In this pool, the plaster was so old that it had bare spots exposing the concrete underneath. It wasn’t losing water but was an “eye sore” and extremely rough.
Next step is to remove the old tile. We cut under the old tile with a 4″ grinder and a diamond blade, then we used a chipping hammer with a wide chisel bit to remove the tile.
Then we add a bed of mortar to provide a smooth surface for the new tile. This will also raise the new tile enough to give room for the new plaster to come up flush to it.
After mortar dries, we use thin set mixed with acrylic mortar admix to set the tile and gout it with “snow white” grout. The next step is to prep the pool for the new plaster.
We completely remove out all the “bubbles” in the old plaster, all loose concrete, any “spotter” tiles on the floor & steps, and chip around all fixtures in the pool and spa so the new plaster can come up flush and still be thick.
Then we apply a “bond coat” for the new plaster to grab onto.
Next step is to re-plaster. There’s many things to consider and watch for, but we will wait for another time to cover.
Immediately fill the spa first making sure it doesn’t spill over into the pool or there will be streaks. Usually takes from 30 to 45 minutes for the spa to fill. Then we fill the pool using empty water bottles to keep the hose from sitting in one spot on the floor. We run two hoses to fill the pool faster. It still takes about anywhere from 12 to 40 hours depending on the water pressure and the size of the pool.
Once the pool and spa are full, we start up the equipment and balance the chemicals in the pool water. It’s important to run the pump and filter for 24 hours. Then we brush the plaster down daily for 10-14 days.