Preping Pool

The preparation steps before plastering a pool involve draining the pool and conducting a thorough assessment of the existing surface.

 

This includes checking for cracks, hollow spots where the plaster may have separated from the shell, or any other areas that need repair. Addressing these issues early prevents future problems and ensures a longer-lasting finish.

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Next, the surface needs thorough cleaning. This involves power washing to remove loose debris, dirt, and residue, followed by an acid wash to further cleanse the surface and remove thin layers of calcium or other mineral buildup. Acid etching roughens the surface, promoting better adhesion of the new plaster layer.

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Once the surface is clean and dry, vulnerable areas, such as cracks or areas may require attention with hydraulic cement. Hydraulic cement is mixed to a putty-like consistency and applied to dampened cracks, ensuring a strong seal. For cracks deeper than 1 inch or requiring larger repairs, hydraulic cement is used to fill the majority of the space before applying the plaster mix.

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Undercutting around fixtures like lights, jets, and main drains is also essential. This involves carefully removing existing plaster several inches below the perimeter tile and around the fittings to ensure a seamless integration and proper bonding of the new plaster layer.

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Finally, applying a bonding agent called a scratch coat, is often a crucial step. A scratch coat is a cement-based coating designed to enhance the adhesion between the existing surface and the new plaster layer. It provides a rough texture for the new plaster to bond to, further strengthening the finish and helping to prevent delamination. The scratch coat should be allowed to cure properly before plastering begins.

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Proper preparation is paramount to the longevity and aesthetics of the new plaster. Neglecting these steps can lead to premature failure of the plaster, requiring costly repairs down the line.