Metal Roof Waterproofing: A Rust-to-Ready Case Study
Metal (IBR) Roof Sheeting Waterproofing & Painting — installed as a complete SealPro system by BloemGuard.
Metal sheeting roofs give homeowners years of reliable service, but the fixing points are always the first to show their age. Once rust starts creeping in around the screws and the factory coating begins to fade and chalk in the sun, a roof that looks structurally fine can already be letting moisture in. This case study walks through a typical IBR sheeting maintenance and repaint job, the kind of work homeowners around Waterkloof, Bloemfontein regularly need on older metal roofs.
The problem with the existing roof
On this roof, the trouble spots were easy to spot up close. Dozens of screw fixings across the sheeting had started to rust, with orange staining bleeding down the panels on either side of each point. Left untreated, rusting screws don't stay a cosmetic problem — moisture works its way past the washer, fixings lose their grip, and small leaks eventually find their way into the roof structure. The original coating was also tired: sun-bleached, thin in places, and no longer giving the metal the protection it needed against harsh sun and seasonal storms.
The solution
An approved SealPro applicator carried out a full maintenance and repaint programme across the roof:
- Wash and degrease the entire roof area to strip off dirt, chalking, and surface contaminants so the new system could bond properly.
- Treat every rusted section with a rust converter, neutralising corrosion at the screw lines and sheet joints before it could spread further.
- Prime the treated sections to lock down the converted rust and give the topcoat a stable, uniform base.
- Apply two full coats of a high-quality roof paint system, rolled and brushed by hand across the full profile of the sheeting for even, durable coverage.
- Reinforce the screw line, sealing each fixing point with flexible waterproofing patches for an extra layer of protection where the roof is most vulnerable to moisture ingress.
The crew worked the roof section by section over several days, keeping coverage consistent across every panel and ridge line.
The result
The roof came away with a fresh, even topcoat from ridge to eave, with every screw line sealed and protected against future rust. What was a patchy, corrosion-prone surface is now a uniformly coated, weather-ready roof built to hold up for years to come.
If your metal roof is showing rust around the fixings or a faded, chalky coating, it's worth having it inspected before those small issues turn into a bigger repair bill.
BloemGuard is an approved SealPro applicator serving Waterkloof and the greater Bloemfontein area.
Contact BloemGuard for a free inspection and quote: 072 933 0162 · bloemguard.co.za
The work, step by step
