Concrete Roof Wateproofing [FAQs]

Signs that your concrete roof needs waterproofing include visible cracks, water stains on ceilings, damp patches, mold growth, or leaks after heavy rain. Regular inspections can also help detect early signs of damage before they escalate.

High-quality waterproofing systems can last 10 to 15 years or more, depending on the materials used, environmental conditions, and the quality of the application. Regular maintenance and inspections can help ensure it lasts longer.

In most cases, the existing roof coating needs to be cleaned, repaired, or removed if it's damaged before applying a new waterproofing layer. Your contractor will assess the condition of the current coating and recommend the best course of action.

The duration of the waterproofing process depends on the size and condition of the roof. On average, it may take 2 to 5 days, including cleaning, preparation, repairs, and the application of the waterproofing material. Weather conditions can also affect the timeline.

Some waterproofing systems, like liquid-applied membranes, can be applied in a variety of finishes, including smooth or textured, and can even come in different colors. While the main purpose is protection, many systems offer aesthetic flexibility.

Once waterproofing is applied, regular inspections (at least once a year) are recommended to check for any wear, damage, or leaks. Keeping the roof clean and ensuring gutters and drains are free from blockages will help extend the life of the waterproofing.

Waterproofing materials that are UV-resistant, flexible, and able to withstand heavy rain are ideal for Singapore's tropical climate. Polyurethane and liquid-applied membranes are popular choices as they provide strong, durable protection against both water and heat.

Most modern waterproofing systems are lightweight and do not significantly add to the roof’s weight. However, it’s important to consult with a contractor to ensure the structural integrity of your roof if additional layers are applied.