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Metal Roof Waterproofing

Metal roof waterproofing has to start at the fixings, because that is where sheeted roofs fail first. The screws and washers holding your roof down corrode years before the sheeting does, and every one of them is a hole through the roof.

Request a Quote

Tell us what the water is doing. We come out free, find where it is getting in, and quote in writing.

A deposit secures your booking and materials, with the balance due on completion.

Our Process

A sheeted roof is a set of joints rather than a surface, so a proper quote counts fixings, laps, flashings and penetrations instead of measuring area.

  1. 1
    Free site inspection.

    Fixings, washers, laps, flashings and penetrations assessed individually, plus the sheeting condition.

  2. 2
    Written quote.

    Replacement fixings, rust treatment, lap sealing or full encapsulation, priced so you can see what is repair and what is coating.

  3. 3
    The work.

    Failed fixings replaced, rust treated and loose material removed, then liquid rubber over fixings, laps and details, or across the full roof where the condition calls for it.

  4. 4
    Follow-up and guarantee.

    Fred phones after the first proper rain. Written, minimum 2-year guarantee.

The TurboMax crew on site in branded overalls, hard hats and harnesses

Why Choose TurboMax

We treat a metal roof as a set of joints rather than a surface to be painted, and that is the difference between a roof that stops leaking and a roof that looks better for two years.

Fred inspects and quotes personally, with Thomas running the second team, so there is an owner on the roof counting the fixings. Fred then phones after the first proper rain to confirm it held, and if it has not, we come back at our cost.

Written, minimum 2-year guarantee on the workmanship, with extended guarantees available on request, and a 10-year service guarantee where the work is maintained by us on an agreed cycle.

What Our Customers Say

Verbatim reviews from Google, alongside photographs of metal roof waterproofing we have actually done. No stock imagery.

Rusted sheet roof before treatment and the same roof recoated in charcoal
Rusted sheet roof before treatment and the same roof recoated in charcoal
Fred is a man of his word. The work they did on our roof was on time and good quality.
Chris Vermeulen
Coated sheet roof running into a rendered gable, with the joint sealed
Coated sheet roof running into a rendered gable, with the joint sealed
Repaired some leaks, redid the waterproofing and sprayed my entire roof with liquid rubber in 2 days at a reasonable price. They also guarantee their work for 2 years.
Raihaan Davids
Flashing detail where a sheet roof meets a parapet wall, sealed and coated
Flashing detail where a sheet roof meets a parapet wall, sealed and coated
Run by a hands-on owner who impressed with his honesty and integrity. After the first rains, he contacted me to enquire about the work.
Erinda Cooper
Three of the crew working their way up a sheet roof with coating and brushes
Three of the crew working their way up a sheet roof with coating and brushes
I received an extremely professional and friendly service. I was provided with expert advice throughout the project, which was completed well within time and under budget.
Dr Deon de Jager
Sealed flashing detail where a flue penetrates a metal roof
Sealed flashing detail where a flue penetrates a metal roof
Excellent, professional, well-priced work. And a completely hassle-free process! 6/5. Thanks Fred!
Minka Vrba
Thank you TurboMax Waterproofing for your service and after service. I can definitely recommend your professional service.
Lindie Lennox

Areas We Serve

Based in Kuils River, covering Greater Cape Town, the northern suburbs, the Helderberg, the Winelands and the Overberg. Each area has its own page for what fails there and why.

Frequently Asked Questions

Straight answers, including the ones that talk us out of a bigger job.

What does it cost to waterproof a metal roof?

It depends heavily on how early you have caught it. Replacing failed fixings and sealing laps is priced by count and is a modest job. Full encapsulation of a badly corroded roof is priced by area, and most of that cost is rust treatment and preparation rather than the coating itself. Catching it at the fixing stage is by far the cheapest version.

Can you coat a rusted metal roof?

Yes, after the rust has been treated and all loose material removed. Coating over untreated rust seals the corrosion in along with the moisture already there, and the sheet carries on deteriorating under a new surface. A properly prepared and coated sheeted roof gains real protection. A badly prepared one just looks better for a while.

My roof leaks around the solar panels. Is that the panels or the roof?

Almost always the mounting feet, where the array was fixed through the sheeting. Every foot is another penetration, and they are frequently sealed with a bead of mastic that has a much shorter life than the roof. They can be properly detailed and sealed, and it is a common call for us.

Do I need to replace my roof or can it be saved?

If the sheeting still has structural integrity, it can almost always be saved, and it usually should be. Replacement becomes the right answer when corrosion has eaten through the sheet across enough of the roof that you would be coating holes. We will tell you honestly which side of that line your roof sits on.

Why does my sheeted roof leak in wind but not in ordinary rain?

Because wind pushes water uphill into the end laps, where gravity alone would keep it out. It points at lap sealing and at fixings that have loosened enough to let the sheets move. It is one of the most common patterns on low-pitch roofs here.

Free inspection, a written quote, and no obligation

Fred will tell you what is actually wrong before there is anything to decide.

Get a Free Quote

Free site inspection, honest diagnosis, written quote.

A deposit secures your booking and materials, with the balance due on completion.

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