Metal Roofs

EcoProof can be applied directly over existing metal and IBR roofing, sealing lap joints, screw penetrations and rust spots without stripping and replacing the roof. The system:

• Requires no fleeces or primers
• Is quick and easy to install
• Comfortably accommodates the movement of the structure

Why waterproof a metal roof instead of replacing it?

Metal roofs expand and contract with temperature, which opens up laps and fixings over time. A seamless, fully bonded liquid membrane has no joints for water to find and flexes with the roof. It is also a cost-effective alternative to re-roofing, and the system needs no flames or solvents.

Where metal roofs fail

Metal and IBR roofs rarely fail in the middle of a sheet. The trouble starts at the laps, where two sheets overlap and water can be driven sideways in a storm; at the screws and nails, where washers perish and holes elongate as the roof moves; at ridge caps, flashings and valley gutters; and wherever surface rust has been allowed to develop. Gauteng’s daily temperature swings make all of this worse, because a metal roof expands and contracts every day.

Traditional repairs such as sealant along the laps, new washers or bitumen patches treat each weak point separately and tend to crack again within a few seasons. EcoProof covers all of them at once with a single elastic membrane that is bonded to the whole roof, so laps, fixings and rust spots are sealed under one continuous skin.

Preparing a metal roof

1. Inspect the sheeting and identify any sheets that are rusted through or structurally weak, which must be replaced.
2. Clean the roof and treat surface rust.
3. Secure or replace loose fixings.
4. Detail laps, fixings, flashings and gutters with the brush and roller grade.
5. Apply the main membrane over the whole roof.

This approach suits homes, workshops, warehouses and factories. For large commercial roofs see industrial roof waterproofing, and for older East Rand roofs see our Brakpan and Germiston pages.

Metal roof waterproofing: common questions

Can metal and IBR roofs be waterproofed?

Yes. A liquid system can be applied over existing metal or IBR sheeting, provided the surface is structurally sound, clean and free of loose material.

Does the roof need to be replaced first?

Not usually. Waterproofing is often a far more affordable option than replacing the sheeting, unless the roof is structurally unsound.

How long does it take to cure?

Depending on the application method, the surface cures instantly (spray applied) or within about 4 hours (brush and roller), depending on the weather.

Ready for a quote? Contact EcoProof Africa and we will arrange a site inspection. Quotes are free and come with no obligation.

See also our corrugated roof and flat roof waterproofing, or read why box gutters leak.