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| Cement Based Options |
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| Plaster can
be colored with blue, green, charcoal, and other oxides. In
addition, other cement based linings have entered the market
using quartz or rock aggregate base. Limestone and dolomite
pool mix has less permeability than quartz or silica aggregates.
Diamond Brite is probably the most recognized brand, but
there are several other choices. |
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Re-plaster
Preparation
Surface preparation is the most important phase in the
re-plaster process. A thorough surface prep assures good
adhesion. Cheap shortcuts lead to problems. Mid-America
Pool Renovation, Inc., uses what is called the "axe-chipping
method" on all re-plastering preps to provide the strongest
mechanical bond. "Scratch coats","bondcoats"
or sandblasting alone cannot provide the same level of adhesion
to the pool shell.
An article in the Pool & Spa Service Industry
News says the "axe chipping method"
is the recommended method because it "creates a very rough
jagged irregular surface without damaging the integrity of the
structure of the pool. It removes loose plaster and allows
the new plaster to bond mechanically to the surface."
In addition, all loose and hollow plaster is removed.
Included in the prep is saw-cutting and carefully chipping away
the old plaster from below smooth and flush with the old tile.
Eliminating this step will leave an ugly algae-trapping plaster
bulge under the tile. Some customers request complete
removal of the previous plaster prior to resurfacing. This
type of removal process greatly raises the cost of a re-surfacing
and according to the Society for Protective Coatings
(SSPC) and the
National Association of Corrosion Engineers' Surface
Preparation specifications 4.3.3., as well as the Pool &
Spa Service Industry News, jackhammering all the old plaster
off the shell "can cause excessive trauma to the integrity
of the pool shell and cause structural damage." |
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