Roof Waterproofing & Repair

In Singapore, the majority of roofs are made of reinforced concrete (RC), a material naturally porous with capillary tracts. Given its inherent tensional weaknesses, concrete can develop cracks due to thermal shifts from prolonged heat exposure. Such a compromised roof, or one with a worn-out waterproofing system, poses a risk of water infiltration, potentially leading to significant structural damage. By adopting routine re-waterproofing, maintenance, and inspection, the threat of roof leaks can be efficiently mitigated.

Methods & Techniques

Torch-on Membrane to RC Flat Roof

Modified bitumen membranes stand out as pre-shaped materials, bolstered with specific reinforcements to yield a robust, flexible, and puncture-defiant product.

The installation involves torching the membrane onto the base. Subsequently, the membrane's edges are overlapped and heat-sealed, ensuring a seamless waterproof shield across the entire roof. With expert installation from a skilled applicator, this system ranks among the best in waterproofing solutions.

At Hydro-seal Engineering, our vast experience spanning multiple buildings and systems positions us perfectly to guide you through Torch on Membrane installations, promising near-flawless waterproofing protection for your structure.

Liquid Applied Membrane to RC Flat Roof

Liquid-applied membrane systems encompass roofing solutions that come in a fluid form. This versatile coating can be applied using brushes, rollers, or specialized spray equipment. Once applied, the liquid sets either by solvent evaporation or through a chemical cross-linking action, culminating in a resilient waterproof membrane.

These liquid membranes are often layered multiple times to optimise adhesion, typically beginning with a primer or sealer. Fibreglass reinforcement or polyester nettings are frequently integrated into the liquid layer to counteract the constant expansion and contraction of concrete roofs due to temperature variations.

Given its adaptability, a liquid applied membrane is the ideal waterproofing choice for intricate and densely-packed roof landscapes.

Liquid Applied Membrane to Roof Tile

Roof tiles, strategically overlapped and secured with nails, are designed to facilitate effective water runoff when positioned at an incline. This arrangement ensures water is efficiently channelled into gutters, circumventing potential pooling commonly seen on flat surfaces.

Yet, despite their durability, tiles are not invincible to the persistent onslaught of the elements. Over time, they can become susceptible to damage and cracks, leading to potential leaks.

To address this, various treatments like sealants, fibreglass, and special waterproofing coatings are applied to seal the gaps between tiles. Beyond the primary tiles, issues can also emerge at ridge tiles, valley gutters, and the roof's flashing.

With meticulous preparation and the right application, a high-grade roof coating system can substantially prolong the lifespan of a tiled roof.

Liquid Applied Membrane to Metal Roof

Metal roofs, frequently constructed using materials such as zinc, aluminium composites, and steel alloys, offer a durable roofing solution. Yet, the majority of leaks experienced with metal roofs can be traced back to corrosion, primarily due to fluctuating temperatures.

Other complications like improper fastening with screws or insufficiently lapped joints can also result in water penetration if left unaddressed.

To waterproof these metal surfaces, a liquid-applied roofing system is highly effective.

This process entails a thorough cleaning and preparation of the existing metal roof, followed by the application of a primer. Subsequent intermediate and final top coatings are then uniformly applied, ensuring a watertight finish.