Flat roofs are notorious for leaking during periods of very wet weather, often necessitating expensive repairs. Here's how to successfully waterproof your flat roof for a leak-free, long-lasting result!
What you'll need
- pressure washer
- flat roof waterproofing preparation
- paint roller
- waterproofing sealant
- plastic shoe protectors
- palette knife
You can obtain everything you need for this project from your local DIY store.
How to do it
First of all, you'll need to check your flat roof to make sure it isn't damaged. If the roofing felt is badly torn or degraded, the roof will need re-felting, rather than just waterproofing, and this is a job for your local roofing contractor. If your roof is undamaged, proceed as follows:
- Before you can waterproof your flat roof, you'll need to clean it so that the surface is free from any dirt and debris. The quickest and easiest way to do this is by using a pressure washer to blast away all the loose surface dirt. Allow the roof to dry thoroughly.
- When the roof is dry, open the tin of waterproofing preparation and mix thoroughly.
- Now use a paint roller to thoroughly coat the roof in the waterproofing preparation. Make sure that you cover the sides of the roof, and apply the product a few centimetres up the wall where the roofing felt joins it and also up pillar curlers. This is important for preventing leaks at this weak point. Allow the first coat to dry thoroughly.
- Your next job is to cover any cracks in the top coat of waterproofing. Cover your shoes with plastic shoe protectors before climbing onto the roof to prevent dirt from ending up on the newly painted surface. Use a palette knife to spread the waterproofing sealant over any cracks. The idea is to end up with a level surface that is free from visible cracks. Allow the sealant to dry completely.
- Now you need to apply the final coat of waterproofing product. Use a fresh paint roller and spread the product over the whole surface of the roof, including awkward areas such as pillar curlers, around pipes and water tanks. Allow the product to dry thoroughly.
Your flat roof should now be ready to withstand the rigours of the winter and summer storms.
You can ensure that your flat roof stays fully waterproof during even the heaviest rain or wildest weather by completing the project outlined above. For more advice or information on waterproofing or repairing your flat roof, have a chat with your local roofing contractor (like Lucas Water Proofing Systems Vic. Pty Ltd).