How to fix your leaking asbestos roof
Unlike many off-the-shelf repair products for asbestos roofs, the fleecebacked tape is made of a tough yet flexible butyl rubber which embeds itself into a coating such as the StopGap.
This is perfect for sealing cracks and generally porous areas in asbestos roofs, and creates a highly durable and reliable repair.
Asbestos roof repair safety
- Ensure your roof is structurally stable and that you're safe at all times of the repair
- Have a look at the HSE Guidelines for working with asbestos. These can keep you safe on your roof and limit your exposure to asbestos fibres
- Got any questions about your asbestos roof repair? Simply get in touch to get some advice from an expert
- Looking for a completely watertight repair? Get everything you need with the Asbestos crack and roof sheet repair kit
Cleaning your asbestos roof
This could be the most important part of your repair, and many a well meaning asbestos roof repair project has been let down by a roof that wasn't cleaned enough. Don't worry, you don't have to clean all of it, just the areas around the cracks or damaged parts you want to waterproof. Use a soft brush to clear the area of moss, and dirt and grime. When sealing cracks in asbestos roofs, it's best to apply the tape to the whole length of the sheet, going beyond just the visible crack. This ensures a watertight finish and means you'll need to clean a strip going the whole length of the sheet.
Washing your asbestos roof
You don't want moss and algae spores growing up under your repair and ruining your weatherproofing efforts. This can lead to those same old leaks coming back again, and you could be back on the roof to repair the repair. A-Clean stops this from happening, and gives you the confidence of a more durable repair. This specialist biocide will kill off any spores and ensure a watertight seal in the long run. Mix one part A-Clean to 50 parts water and use a soft brush to wash the roof clean. Make sure the roof is completely dry before moving on to priming. A-Clean is included in the Asbestos crack and roof repair kit.
Priming your asbestos roof
Your asbestos roof is a porous surface, and so needs to be primed in order to ensure proper adhesion and a 100% watertight seal. For the fleecebacked butyl tape, it's best to use the emergency repair solution StopGap as a primer and a topcoat. This easy to apply solution is a reinforced and UV stable repair that'll give the butyl a strong base to sit on. Apply sparingly and cover the affected areas, and well beyond. When sealing cracks, you'll need to prime around 6cms either side of the crack, enough to go beyond the tape. Wait for the primer to dry before moving onto applying the tape. Again, StopGap is included in the Asbestos crack and roof repair kit.
Applying the fleecebacked butyl tape and another layer of StopGap
Once the StopGap has dried, you're ready for the main event. Unroll and cut the tape to the desired size. For cracks, apply to the whole length of the sheet, butting up or tucking under the sheet above. Apply pressure to all parts of the tape, where it's safe to do so, paying particular attention to pressing down the edges. Follow this with another application of StopGap, this time applying generously. The reinforcing fleece on the back of the butyl will embed itself into the StopGap, strenghening the repair. Use a brush to ensure the fleece is well soaked with the StopGap. The StopGap should completely seal the repair and cover all sides of the butyl tape.
Tips and tricks from the asbestos roof repair experts
All done! Leaks stopped and you can sleep soundly through heavy nights of rain.
You can find all of the products above gathered together in the Asbestos crack and roof repair kit which makes it quicker and easier to repair your asbestos roof.