While flat roofs can look beautiful on modern builds, some older buildings may suffer leaks or instability if they haven’t been renovated recently or if the original building work was of a poor standard. With covering, joints, insulation, a structural deck, drainage outlets, guttering, parapets, flashing, vapour barriers, surface coverings, and even reflective treatments, there are lot of elements on a flat roof that may require repair or replacement as the building ages and the materials are subject to weather damage.
Does My Flat Roof Need Repairing?
Most clients get in touch about a repair if they detect a leak within the house. Due to the structure of flat roofs and the layered coverings, the leak may not be directly below where the water enters the roof since it travels to the lowest point and has to penetrate multiple barriers.
Signs that you need your flat roof repaired or even recovered include:
- Leaking within your interior
- Water stains on your ceiling
- Ponding (ie. puddles of water on your roof, especially if they are more than 20mm deep)
- Plant growth (this is often found in conjunction with ponding, and the roots can cause further damage to your roof)
- Damaged cracks/joints
- Rusted roof nails
- Discoloured gravel (if you have a gravel covered roof)
- Blistered roof covering
If you have a leak but are unable to inspect the roof yourself, we will happily find the source of the leak and suggest solutions.
Repairs or Recovering
Whether your leak requires a repair or total recovering depends on the source of the problem and the type of roof you have. If you have multiple leaks or there is a structural problem, or if the materials used have begun to degrade, it’s often advisable to completely recover the roof since you will spend more time and money on patching up the roof on multiple occasions.
Flat Roof Options
We will often repair flat roofs with materials that match the original roof, but if you are having your roof completely recovered you may choose to change your roof type for something that is more durable. Options include:
- Built up felt roofing – this usually uses bitumen to seal, and has a life expectancy of around 20 years. These roofs are suitable for patch repairs.
- Single ply membrane – this is created with a single sheet of material that’s fixed directly to the roof. The life expectancy of these roofs is around 25 years.
- Polymer modified mastic asphalt – this roof type has a life expectancy of 50+ years, but is often more expensive than build up felt or single ply membrane roofs.
- Sheet metals – you can choose from zinc, stainless steel, and copper to create an attractive and durable roof covering. Metal roofs are considerably more expensive than the other options, but are often used on luxury modern builds.