Swimming pool leakage is one of the most common problems encountered during the service life of tiled swimming pools. For new construction, waterproofing is normally integrated into the original pool structure. However, for existing swimming pools, repairing leakage can become a challenging task, especially when the pool finishes are still in good condition.
The conventional repair method usually involves removing existing tiles, repairing the waterproofing layer underneath, and reinstalling new finishes. While this method can restore waterproof performance, it also brings additional demolition work, higher costs, longer construction periods, and disruption to daily operation.
For many renovation projects, especially hotels, resorts, condominiums, and commercial facilities, the key challenge is not only to stop leakage, but also to complete the repair with minimum impact on the existing structure and finishes.
This raises an important question:
Is it always necessary to remove existing tiles when repairing a leaking swimming pool?
In many cases, the answer is no.
Understanding the Causes of Swimming Pool Leakage
A tiled swimming pool consists of multiple layers, including structural concrete, waterproofing protection, tile adhesive, decorative tiles and etc. Each layer plays a different role in the overall system performance.
During long-term service, leakage may occur due to:
• Aging or failure of the original waterproofing layer;
• Cracks caused by structural movement;
• Deterioration of grout joints;
• Water penetration through weak points around drains, corners, or penetrations; and
• Loss of waterproof continuity due to aging materials.
In most tiled swimming pool systems, ceramic tiles mainly provide the decorative and protective surface, while the waterproofing layer beneath the tiles is responsible for preventing water leakage.
Therefore, when existing tiles remain firmly bonded and suitable for refurbishment, removing them may not always be the most efficient repair approach.
Waterproofing Over Existing Tiles: An Alternative Repair Strategy
Instead of removing the existing tile finish, another approach is to restore waterproof performance by applying a new waterproofing layer directly over the tiled surface.
This repair strategy can significantly reduce demolition work and shorten the renovation process compared with conventional demolition-and-rebuild repairs. It is particularly suitable for refurbishment projects where the existing tiles remain securely bonded and replacement of the decorative finish is unnecessary.
However, not every waterproofing material is suitable for direct application over ceramic tiles.
A coating designed for this application must provide excellent adhesion to dense, non-porous surfaces while forming a seamless waterproof membrane capable of withstanding continuous exposure to water and common pool treatment chemicals. In addition, the coating should provide good aesthetic performance to meet the appearance requirements of swimming pool environments.
Coloured polyaspartic waterproofing technology meets these requirements. By combining strong adhesion, high durability, excellent weather resistance, and a range of colour options, it enables a new waterproof layer to be installed directly over existing tiled surfaces while providing a refreshed appearance for swimming pool renovation projects.
How Does Polyaspartic Waterproofing Work?
1. Prepared Substrate
2. Primer
OYH Solutions: YHPrimer-2000Pro Two-Component Epoxy Primer
3. Waterproofing Layer
OYH Solutions: YHPAroof-8532 Two-Component Polyaspartic Waterproof Coating
For a successful refurbishment, the existing tiled surface shall first be inspected to confirm that the tiles are firmly bonded and suitable for overlay application.
Proper surface preparation is essential to remove contaminants and ensure sufficient adhesion. Any damaged grout joints, cracks, or local defects shall be repaired before waterproofing application.
A compatible primer is recommended before applying the polyaspartic waterproofing coating. The primer improves adhesion to the dense ceramic tile surface and provides a stable base for the subsequent waterproofing layer.
After curing, YHPAroof-8532 forms a seamless waterproof protective layer over the existing tiled surface while providing a durable coloured finish suitable for swimming pool environments.
Why OYH?
OYH is a global construction materials system service provider offering integrated solutions for commercial, industrial, infrastructure, and residential construction. With over 30 years of experience in construction materials, OYH provides integrated waterproofing systems for projects in more than 150 countries and regions. Our product portfolio covers waterproofing membranes, liquid-applied coatings, tile installation systems, sealants, repair materials, and complete waterproofing and construction systems designed for long-term durability and compatibility.
Explore more about OYH waterproofing systems →
OYH Polyaspartic Waterproofing Solution
For swimming pool refurbishment projects where the existing tile finish can be retained, YHPAroof-8532 Two-Component Polyaspartic Waterproof Coating provides an efficient solution for restoring waterproof performance while maintaining the original appearance.
The product is designed for applications requiring high mechanical strength, durability, and long-term exposure resistance. With various colour options available, including commonly used swimming pool colours such as blue and green, the coating can achieve a refreshed appearance that harmonizes with existing pool designs.
In addition, YHPAroof-8532 can be used as a pedestrian- and vehicular-traffic-bearing top coat in waterproofing systems for applications such as multi-storey car parks, stadiums, and arenas. Its resistance to long-term water immersion and water scour also makes it suitable for demanding environments including outdoor swimming pools and water parks.
Key performance characteristics include:
• Outstanding abrasion and wear resistance for long-term durability;
• Low viscosity for easy application by spray, roller, brush, or squeegee;
• Excellent crack-bridging capability and flexibility, even at low temperatures;
• Good adhesion to a wide range of properly prepared substrates;
• Resistance to water, de-icing salts, diluted acids, and alkalis;
• Excellent UV resistance and colour retention for exposed applications;
• Longer pot life than many conventional multi-component high-performance waterproof coatings, providing greater flexibility during installation.
Application Considerations
The durability of a swimming pool repair system depends not only on the waterproofing material but also on proper substrate evaluation and application procedures.
Before application, the following points should be confirmed:
• Existing tiles are firmly bonded with no significant hollow or loose areas;
• The surface is clean and free from contaminants that may affect adhesion;
• Cracks, deteriorated grout joints, and other defects are properly repaired;
• A compatible primer is applied before the waterproof coating;
• The coating is fully cured before the pool is refilled.
Proper preparation and correct installation are essential to achieving reliable long-term waterproof performance.
Conclusion
A leaking swimming pool does not always require complete demolition and reconstruction.
When the existing tile surface remains suitable, a coloured polyaspartic waterproofing system can provide an effective repair solution by restoring waterproof performance while giving the swimming pool a refreshed and durable finish.
With advanced waterproofing technologies and comprehensive system solutions, OYH provides reliable solutions for swimming pool refurbishment projects, helping building owners and facility operators reduce unnecessary demolition, minimize downtime, and extend the service life of existing swimming pool facilities.
By selecting the appropriate repair strategy and waterproofing system, swimming pool renovation projects can achieve long-term performance while improving both functionality and aesthetics.
Planning Your Next Waterproofing Project?
Every project has unique substrate conditions, durability requirements, and construction constraints. Whether you’re repairing an existing structure or designing a new waterproofing system, OYH provides complete waterproofing solutions supported by technical guidance and compatible system design.
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