Metal Roof Waterproofing in South Africa seals IBR and corrugated iron roofs at screws, laps, ridges and flashings, and treats rust. Send one request and independent local waterproofing contractors reply with prices.
Say whether your roof is IBR or corrugated and where it leaks, and get quotes.
Get Waterproofing QuotesWhere Metal Roofs Leak
- Screws. Rusted, loose or missing screws and perished washers.
- Laps. Side and end overlaps where sheets join.
- Ridge and hips. Ridge capping that has lifted or rusted.
- Flashings. Wall and chimney flashings that have pulled away.
- Rust holes. Corrosion through the sheet, often near gutters and laps.
IBR and Corrugated Roofs
- IBR. Trapezoidal profile common on homes, garages and warehouses.
- Corrugated. Wave profile common on older homes and outbuildings.
- Low pitch. Very flat metal roofs leak more at end laps.
- Galvanised and coated. Older galvanised sheets rust faster once the coating wears.
Methods and When They Fit
- Screw and lap sealing. Fits when sheets are sound and leaks are at fixings and joints.
- Rust treatment and coating. Fits when rust is surface level and the metal is still solid.
- Full roof coating system. Membrane over laps and screws plus coats over the whole roof.
- Sheet replacement. Needed where rust has eaten through or sheets are badly bent.
A coating will not save sheets that have rusted through. The contractor should check sheet condition before quoting a coating.
Metal Roof Waterproofing Prices
Ballpark prices so you can sanity-check a quotation.
| Item | Ballpark price |
|---|---|
| Metal roof coating system | R120 - R280 per m² |
| Rust treatment | R40 - R90 per m² |
| Roof screw replacement | R15 - R40 per screw |
| Flashing replacement | R150 - R400 per metre |
| Leak inspection call-out | R500 - R1,500 |
| Small leak repair | R1,500 - R5,000 |
Prices JUST UPDATED. Indicative ballpark figures in rand, rounded, including labour unless stated. They are not our prices or quotations, and no contractor is bound by them. Confirm VAT, access costs, the product system and what each quotation includes.
Get prices for your property rather than a range. Send one request and see who replies.
Get Waterproofing QuotesWhat Affects the Quote
- Rust level. Heavy rust takes more treatment or needs new sheets.
- Roof area. Larger roofs cost less per m².
- Pitch and height. Steep or high roofs need safety equipment.
- Screws and laps. The number of fixings to replace adds labour.
How the Work Is Done
- Inspect. Check sheets, screws, laps, ridges and flashings.
- Clean. Pressure clean and remove loose rust.
- Treat. Apply rust converter or primer to bare metal.
- Seal. Replace screws and seal laps and fixings with membrane.
- Coat. Apply the finish coats if a full system is chosen.
Preparation and Disruption
- Noise. Walking on sheets and changing screws is noisy inside.
- Water use. Pressure cleaning needs a water supply.
- Overspray. Cars and outdoor items may need covering.
- Weather. Coatings need dry weather to cure.
Maintenance and Questions to Ask
- Gutters. Clear gutters so water does not back up under laps.
- Recoat. Plan for a recoat when the finish starts to chalk or wear.
- Ask. Which sheets need replacing, how many screws will be changed, and what product is used on laps?
Metal Roof Waterproofing FAQs
Can a rusted IBR roof be waterproofed?
Yes, if the rust is on the surface and the sheet is solid. Sheets with holes need replacing or patching first.
Will a coating stop leaks at screws?
Only if screws and washers are replaced or sealed properly first. Paint alone does not seal a loose screw.
Is it cheaper to coat or replace a metal roof?
Coating is usually cheaper when sheets are sound. Replacement makes sense when rust is widespread and deep.
Does a metal roof coating help with heat?
Light, reflective coatings can reduce heat on the roof. Ask the contractor what to expect from the product.
Related Services
Get metal roof quotes through Waterproofing South Africa and compare the sheet repairs, screws and coating each contractor includes.
Waterproofing South Africa is a quote and referral service. We do not carry out waterproofing work and we do not employ contractors. Work is quoted and carried out by independent local contractors, and your agreement is with the one you choose. The right system depends on an inspection and the cause of the water ingress. Ask for a written quotation, the product system and the guarantee terms before you pay a deposit.
Metal Roof Waterproofing. Describe what you need once and get the best quote, fast.
Get Waterproofing QuotesGet the Best Quote, Fast
Keep it brief. Say what is leaking or damp, the type of surface and your suburb. Your enquiry is passed only to contractors suited to the job, and you decide whether to go ahead.
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