Project component

Work completed

Preparation

Failed membrane removed and concrete repaired

Drainage

Minor slope corrections and emergency outlets

Membrane

4 mm Torch Bond torch-on waterproofing

Protection

Two silver aluminium reflective coats

Flat Roof Repair & Torch-On Waterproofing in Bryanston, Sandton

This flat concrete roof in Bryanston, Sandton had reached the end of its service life. The existing waterproofing system had deteriorated extensively, allowing water to penetrate the roof structure and causing ongoing leaks. 7:24 Roofing carried out a complete roof restoration by removing the failed waterproofing, repairing the concrete substrate, improving drainage, and installing a new heavy-duty torch-on waterproofing system.

The Challenge

The existing waterproofing membrane had become brittle and delaminated from the concrete roof slab. During removal, 7:24 Roofing discovered areas of deteriorated concrete and sections where the roof slope was insufficient, allowing water to pond instead of draining efficiently. 7:24 Roofing also identified the need for additional emergency overflow outlets to improve the roof's drainage performance during heavy rainfall.

the company's Roof Repair Process

To ensure a long-lasting waterproofing solution, 7:24 Roofing completed the following work:
Removed and disposed of all old, damaged waterproofing membranes.
Cleaned and prepared the concrete roof substrate to create a sound surface.
Repaired damaged concrete and completed minor slope corrections to improve water runoff.

Installed additional emergency outlet pipes to enhance drainage and reduce the risk of water build-up.
Applied a high-quality bitumen primer to ensure maximum adhesion.
Gas-fused a 4mm Torch Bond torch-on waterproofing membrane, fully welded to the concrete substrate for a seamless, watertight finish.
Carefully waterproofed all parapet walls, corners, outlets and detailing to eliminate potential leak points.
Applied two coats of silver aluminium reflective protective coating to shield the waterproofing membrane from UV exposure, reduce heat absorption and extend the lifespan of the system.

The Result

The completed project transformed an ageing, leaking flat roof into a durable waterproof roofing system designed to withstand Johannesburg's harsh weather conditions. The new torch-on waterproofing provides superior protection against water ingress, while the reflective aluminium coating improves energy efficiency and significantly extends the life of the membrane.

7:24 Roofing specialises in professional flat roof repairs in Bryanston, Sandton, including torch-on waterproofing, concrete roof restoration, roof leak repairs, emergency outlet installation, and long-term waterproofing solutions for residential and commercial properties.
If your flat roof is leaking, blistering or showing signs of waterproofing failure, the company's experienced team can provide a comprehensive inspection and recommend the most effective repair solution.