1) Using Crack Repair Tape
Where cracks are obvious, crack repair tape is a fast way to stop leaks in asbestos cement roofing – but not all tapes are the same. Although it’s tempting to resort to commonplace products, many are bitumen based, meaning they're affected by UV light and can easily crack in the cold.
Our solution is a rubber-based tape. It's UV stable, maintains its flexibility, and never sets hard – essential on roofs with cracks, where repair materials require the same high degree of movement as the roof itself. This cost-effective solution is highly effective and straightforward, making it first on our list, and an essential tool in any asbestos crack repair. You can get everything you need to seal that crack with our easy to apply repair kit.
Need a simple and reliable repair solution? We also recommend using the fibre reinforced instant repair StopGap.
2) Asbestos Roof Hole Repair
In emergencies, you need a product that works quickly. Again, we’d urge caution with some of the well-known products that claim to work in water and cold. To some extent they do, but when the integrity and weatherproofing of your premises is at stake, you really need a longer-lasting solution. We’re sure you would prefer not to keep sending someone back onto your roof to ‘repair the repair’. That's why we've created the DIY Asbestos Roof Hole Repair Kit, with everything you need and a step by step photo guide that makes it easy.
3) Bolt-hole Repairs
Bolt holes in your asbestos roof will eventually enlarge and the washer will corrode due to exposure to UV, making it ineffective. You can repair this by replacing the washer and bolt, or using a flexible tape or coating to seal the area. Where replacing the washer and bolt isn’t an option due to difficult access to the roof, the flexibility of crack repair tape is ideal. You can also apply an emergency repair coating to seal the bolt hole.
4) Sealing general roof sheet damage + cracks
Asbestos sheets will eventually deteriorate and that can mean leaks and water damage. This can lead to cracks. Nobody wants to watch their building and possessions being destroyed every rainfall. Many sealants don't have the durability for long term repair, particularly as frequent temperature changes cause the building to move. So even after repair, many building owners end up back on the roof.
That's why we only use UV stable, flexible, and highly durable repair solutions that can stand the test of time. You get a watertight repair that can stop your leak and seal your roof against the worst of the rain.
5) Asbestos Single Sheet Replacement
The traditional way is to remove the old sheet and replace with a new one. You can also use glass-reinforced plastic (fibreglass) GRP Oversheet, applied externally. GRP gives a guaranteed replacement lasting up to 50 years without deteriorating. It’s also completely waterproof, so you avoid the ongoing expense of treating it. GRP comes in various colours, and because it’s cold applied, you avoid the Health & Safety risks of heat treatment.
6) Refurbish with a specialist Coating
Coatings provide a permanent and highly effective waterproofing solution in an easy two step process. All loose asbestos fibres and lichen are encapsulated and bound with a Primer. Then a coating topcoat gives long-lasting protection and a completely weatherproof, UV and dirt-resistant roof that’s guaranteed to last for many years. When combined, the two components also encapsulate asbestos fibres and reduce the risk of their release, a comforting thought for all those spending time under the roof.
We’re the UK distributor for a wide range of coatings, meeting the demand for your every budget, desired longevity, climactic restriction and many other factors. We're all about choice, and our experts can provide everything from emergency patch repair to a long-term waterproofing solutions.
Want to learn more about coatings?
7) Over Cladding
When repairing asbestos cement roof damage with sealants or localised repairs isn’t possible, you could consider overcladding, by putting another roof (normally metal) on top of the old roof. This is a proven technique for repairing asbestos roofs and the next best method after coating. In most circumstances you’ll need to comply with current building regulations and add insulation to help reduce heating costs.
8) Repairing Roof Lights
Roof lights will eventually deteriorate, crack, leak, build up mildew and turn dark, so less natural light gets in. Repairing with tape is possible, but not ideal, and will restrict light further. Replacing the roof light is preferred, but working on roof lights is risky, especially if they’re in asbestos roofs.
There’s another solution, involving cleaning and coating the skylights with a tough, clear coating. This will improve the light tremendously and is far cheaper than new skylights. It’s also much less disruptive to your business and avoids having holes in your roof during the work.
Stop your roof lights from leaking with the liquid rubber SuperArmour.
We believe in good honest choices, and providing customers with independent advice about the options open to them. We've helped countless industrial building owners find a solution tailored to their needs, from emergency patch repair to full roof refurbishment, as well as catering for asbestos gutters and internal fibre encapsulation.