Our Pool Replaster Process

Our Pool Replaster Process

Replaster Methods

Our replaster process


When preparing to have your pool replastered Homeowners should ask their Contractor how long the plaster finish being installed will be guaranteed to adhere to the substrate. G&B Tile and Plaster guarantees our process longer than any competitor. It is detailed in our 10 year warranty.

There are several methods of replastering that are acceptable, according to the National Plasterers Council Technical Manual. The Standard Method in our market (DFW) is the use of bond coat to adhere the new plaster to the old plaster. The problem with this common method is the type of bond coats used and the extent at which they are used. Bond coats = Hollow Plaster. At G&B Tile and Plaster we don’t use the standard method, we use the best method.

Replastering a pool does not mean to layer plaster layer upon plaster layer upon plaster layer. Any plaster company can replaster a pool; however, if you hire a company that replasters your pool without first removing the previous replaster layer(s) prior to the replaster prep process, your pool replaster investment will not last long. It will not be properly replastered. If a pool that is going to be replastered has more than one layer of plaster, the outer layers must be completely removed. Anything less than this is a bad practice that can lead to failure in your investment. A replaster should only be performed on the original plaster layer.

There are two main types of bond coats used in the pool industry when replastering a pool. Bond Coats = Hollow Plaster:

  • Manufactured bond coats (such as Multicoat,CLI,or SGM) designed for underwater use, are acceptable if the pool has never been replastered and the existing plaster is solid. Manufactured bond coats should not be used over multiple layers of plaster without first stripping the layers of plaster off the pool to find a solid, non-hollow surface. The applicator must follow the manufactures directions. Manufactured bond coats are only as good as the individual installing the material.
  • “Glue bond coats” or homebrews are widely used by several companies in DFW. This is simply glue with other components added to it, creating a product that not been designed for underwater use. It is used by those companies to save money at your expense. They will never guarantee it to last. They hope it will survive one year. Allowing a home brew bond coat to be used on yourpool is a bad practice. If you see a company using a homebrew bond coat on your pool replaster investment, you should stop them immediately and call G&B Tile and Plaster.

* G&B Tile and Plaster does not use bond coats of any type!

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Newly applied plaster is semi permeable until the finish has hydrated enough to close the pores in the finish. Until the pores close, some water will be allowed to reach the back of the plaster and ultimately the bond coat. Water that reaches the back of the plaster will re-emulsify the homebrew and eliminate any bond that may have existed between the plaster and the homebrew bond coat. Once this happens it places the plaster at risk and can cause the plaster to develop hollow spots or “pop-offs”. Once your replaster investment begins to debond you are now faced with a patch repair that will not match the existing plaster. The only way to correct the broken hollow spot and ensure the repair matches is to completely replaster your pool again.

Drain the pool and remove the hydro static pressure. Saw cut under the tile and chip down 2-3″. Sound (tap) the pool for hollows. Chip out and remove any that are found. Acid wash and neutralize the surface. Install the bond coat.

Some contractors will put a bond coat over your existing plaster without performing a quality check of the existing shell to determine if the existing plaster is loose/hollow. It is common for water to remain between layers of plaster in a pool when it is first drained. If you check a pool for hollow spots before allowing that water to leak out of the plaster layers and into the pool, the sound check for hollows will likely not reveal any hollow spots. This will cause the pool to be prepped over loose plaster, resulting in a premature failing of the plaster finish.

G&B is always asked how long a plaster finish will last, but never asked how long the bond of the finish will
adhere to the substrate. That question is the most important question when you consider the increased number of types of plaster that are on the market designed to last longer than traditional plaster. If the plaster company does not perform a quality check of the existing shell, the finish will not last the 7-10 years that the plaster manufacture warrants the finish. The resulting bond failure is not a warrantable issue for the plaster manufacture. The plaster company that used a bond coat will not stand behind the failure because they did not warrant the bond of the finish at all.

Drain the pool and relieve the hydrostatic pressure. Hydro Demo (40,000 PSI) every square inch of the original plaster surface to remove all organics, paint, weak plaster, and to create a superior anchor pattern for the new pool finish. This is the best prep process available for your pool. It is unmatched in the industry. See how G&B Tile and Plaster separates itself, with this process, from the competition at http://www.youtube.com/user/poolsub1

Our process utilizes a water jetting machine and allows G&B Tile and Plaster to provide the best surface profile possible for the new plaster to adhere to. Our process allows G&B Tile and Plaster to forgo the use of acid and bond coat in our prep process with superior results. They are completely unnecessary. We also do not need to sandblast paint in instances where pools have been painted prior to prepping our pools.

G&B Tile and Plaster’s Hydro Demo Prep Process also eliminates delays due to weather concerns. With bond coat, plaster companies need to be concerned with potential rain falling and washing out their bond coat and with cold temperatures during the winter. If the temperatures fall below freezing during the night, it can crystallize the moisture still in the bond coat and cause it to fail

If the pool has been replastered in the past, that layer will be removed prior to the Hydro Demo. This section applies only to pools that have been replastered in the past. A previously replastered pool will not be a good substrate for a new plaster investment and that is why G&B Tile and Plaster insists it be removed. This protects your investment from failing prematurely

G&B Tile and Plaster (G&B) warrants its pool finishing products against bond failure for ten (10) years from date of installation. This is a bonding guarantee and covers bonding only. This is valid only if the prep is performed on the original plaster layer with our water jetting machine. All previous replaster layers must be removed for this warranty to be in force. Those previous replaster layers, if present, will be removed at an additional charge.

G&B Tile and Plaster agrees to plaster the pool at the address on the contract and guarantees that for a period of five (5) years the plaster will be watertight and will not debond provided that the pool structure remains sound, that start –up procedures recommended by G&B Tile and Plaster are followed, and that all the water chemistry after start–up is properly maintained in accordance with the instructions from G&B Tile and Plaster. Water chemistry consists of: total alkalinity, pH, hardness (calcium & magnesium), iron, copper, and total dissolved solids (TDS).

Get a quote from G&B Tile and Plaster to see all of the details.