Water is a key component of the swimming pool’s structure and is aggressive towards both the frame and all of the materials used to build it. A swimming pool’s walls and floor are exposed to a variety of penetrations, including inlets, skimmers’ throats, lighting fixtures, cleaning systems, and more. Leaks can be annoying as a result of all this and the constant water pressure. To make sure they can hold the water, the concrete shells must be sealed.
Once the refurbishment or new installation of the swimming pool’s purpose has been determined, it will be possible to identify the most suitable type of foundation and the most appropriate waterproofing system.
Why is waterproofing for swimming pools necessary?
- Shrinkage cracks.
- Lack of waterproofing barriers between the pool water and concrete wall.
- Failures in plumbing and suction lines.
- The formation of honeycombs.
- Construction joints.
- Pipe Penetrations.
- Corrosion is caused by permeable water and air through the surfaces.
What are the considerations for waterproofing swimming pools?
- The waterproofing membrane must be sealed properly to withstand the hydrostatic pressure of water.
- The surface of the pool must be equipped with a system that is long-lasting, simple to clean, resistant to chemical effects, and doesn’t alter colour.
- It is incorrect to regard the painting or tiling layer as a waterproofing layer.
- Always use a reliable under-tile waterproofing solution.
- Corners must be treated for waterproofing using water sealing adhesives.
- Water pressure that is both positive and negative must be accommodated by the waterproofing system.
What are the methods for waterproofing swimming pools?
Both positive and negative hydrostatic pressure must be addressed by the product. The substrate above the pool creates positive hydrostatic pressure, and the water below the substrate creates negative hydrostatic pressure. Before beginning the tiling process, the appropriate product must be placed to the substrate’s surface and given time to cure. For a quick installation, pick a membrane that enables direct bonding of tiles.
Step 2: Smoothen the surface
Any differences in the pool’s wall or floor must be brought within acceptable water levels. In this application for swimming pools, the additive can be used successfully.
Step 3: Clean the surface
Make sure the substrate is adequately prepared to provide a strong bond between your waterproofing membrane and the tile. Pressure washing, sandblasting, shot blasting, and grinding are used to first remove impurities from the substrate, including grease, dust, residues, and loose materials from honeycombing or laitance. Then, all openings that could compromise even the greatest waterproofing system, including as penetrations, joints, seams, corners, drains, and expansion/control joints, are sealed. Before applying the membrane, the surface must first be washed with a wet sponge and allowed to dry. After finishing up the preparation, vacuum up all the dust, clean the surface with a wet sponge, and then wait until it has dried before putting the membrane.
Step 4: Application of the waterproofing membrane
After the pool is prepared for waterproofing, the membrane is applied to the entire surface in accordance with the manufacturer’s instructions. For the waterproofing membrane to form a strong bond during application, it is essential to check for restrictions on temperature ranges. Three layers of plaster are commonly used for high-quality products. Concrete as fresh as three days old can be coated with it using a roller, trowel, or spray, and it cures in about two to three hours. Waterproofing Mesh should be used for all flashing as directed by the product’s instructions. When the flashing is finished, use a nap roller, v-notch trowel, or airless sprayer to cover the entire surface with the membrane. Apply the first coat with a wet film thickness of at least 2- 25 mils. One to two hours, or until the membrane turns semi-transparent, are needed to let this coat dry. On a right angle to the first coat, follow it by applying a second layer.
Step 5: Water ponding test
Before starting the tile installation, perform a test to ensure that the pool is waterproof once the membrane has been adequately cured. Test must be performed to confirm that the pool is waterproof after one week of curing before the tile installation can start. But, if a leak is discovered, there is a problem that needs to be fixed. Fill the pool above the first level of fixtures and repeat testing if there are no leaks found. Drain the pool as much as necessary to make repairs if a leak is found at any time.
Refurbishment & repair works of swimming pool at Dua Residency Condominium, Jalan Tun
Razak Kuala Lumpur by Structural Repairs (M) Sdn Bhd
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