Location: Vanderbijlpark, Gauteng
Service: Metal Roof Waterproofing & Painting

Corrugated metal roofs take a beating from the Highveld sun, hail and seasonal rain, and sooner or later the factory coating starts to give up. This case study looks at a typical large corrugated metal roof where the old paint system had failed completely, and walks through the coating process used to bring it back to a fully protected, watertight finish.

The problem: a failing coating and creeping rust

Years of sun exposure, hail impact and seasonal rain had broken down the roof’s original coating. Across the sheeting, the old paint had blistered and lifted, and in the worst areas it had flaked away completely to reveal dull, oxidising metal underneath. Once bare steel is exposed like this, rust spreads quickly, working its way under the surrounding paint and along the overlaps and screw lines where water tends to sit. Left untreated, that kind of corrosion eats into the sheeting itself and eventually leads to leaks. A roof in this state needs more than a quick repaint — it needs proper preparation and a coating system that seals every vulnerable point and stops the rust in its tracks.

The solution: a full metal-roof coating system

As an approved SealPro applicator, SealAll Roof Contractors follows a proven sequence for restoring metal roofs like this one:

1. Deep clean. The full roof area is high-pressure washed to strip loose paint, dirt and chalk, then degreased so the new system can bond to a sound surface.
2. Rust treatment. Every rusted section is treated with a rust converter to neutralise corrosion and stabilise the bare metal before coating.
3. Priming. The prepared sheeting is primed with a Purple Prime metal primer to lock down the surface and give the topcoats maximum adhesion.
4. Sealing the weak points. Overlaps, joints and screw lines — the places where metal roofs almost always start leaking — are reinforced with StretchSeal, and the fasteners sealed so water can no longer track underneath.
5. Two protective topcoats. Finally, two full coats of high-quality roof paint are applied across the entire roof, giving an even, hard-wearing, weatherproof finish.

The result: a protected roof that looks brand new

The transformation is dramatic. Tired, rust-streaked sheeting is replaced by a clean, uniform coat that looks factory-fresh from every angle. More importantly, the metal underneath is sealed against the weather, the rust is stopped, and the vulnerable joints and screw lines are watertight. The result is a roof that not only lifts the whole look of the property but stays protected against corrosion and leaks for years to come.

Whether your metal roof sheeting is fading, flaking or starting to rust, the same care and coating system can bring it back to life. SealAll Roof Contractors is an approved SealPro applicator serving Vereeniging, Vanderbijlpark and the greater Vaal region.

Related SealAll Roof Contractors services: roof waterproofing · roof coating and painting · roof maintenance across the Vaal Triangle.

Contact SealAll Roof Contractors for a free inspection and quote: 072 694 9243 · roofcontractors.co.za

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