What to expect when plastering a pool or remodeling an existing pool
The finish consists of pebbles and cement and will vary in color, shade, consistency, and exposure. The color and shade will vary throughout the day as the sunlight reflects from different angles.
Pool Interior Finish Discloser
Pool interior finishes are composed of materials which may have inherent shading and/or color variation which is normal and should not be construed as a defect. Environmental factors such as humidity, temperature, and substrate conditions during the installation process can cause normal color variations (normal mottling) across the surface of the coating. This is generally a uniform shading or cloudy appearance. These variations may be more pronounced on a cloudy day or at night with the light on. These conditions are beyond the contractor’s control. Discoloration or mottled-shade variation is not considered a failure or defect but is characteristic of most cementitious products, not needing remedy. It is a normal occurrence of most exposed aggregate finishes to have variation in the surface aggregate density or variations in the concentration of aggregates across the finished surface. Proper evaluation of an interior finish is done when the pool is under water and under natural light conditions only. The pool interior finish is NOT guaranteed for evenness of color and may not be the exact shade anticipated. The shade and color of pigmented surfaces will vary and “fade” over time. Crazing (check cracks and hairline cracks) may be noticeable and quite pronounced with colored finishes. These are normal and are not considered defects.
It is highly recommended to perform a start-up procedure on freshly plastered pools such as the NPC start-up procedure. A proper start-up will promote a longer-lasting interior finish.
The longevity of the surface will be dependent on the water chemistry after start up being properly maintained in accordance with the Association of Pool and Spa Professionals (APSP) published standards and recommended practice of maintaining the Langlier Saturation Index at 0 to +/- 0.5. Overall common water chemistry parameters to be monitored are: chlorine, total and carbonate alkalinity, PH, calcium hardness, cyanuric acid and total dissolved solids.
This information is endorsed by the National Council Plasterers Council, Inc. NOTE: We urge you to contact your NPC professional applicator for more information specific to your pool or spa. Chemical treatment alone will not provide sanitary pool water. A filtration system in proper operation, along with a regiment of care including pool brushing, will produce the optimal results for a clean and safe pool.