If you regularly clean and maintain your fibreglass roof, you should see a life expectancy of 20 to 30 years, before it needs replacing. This compares favourably to traditional flat roofs - those constructed from either asphalt or mineral felt - which will typically have a maximum life expectancy of between 10 to 15 years.
Many of the first fibreglass roofs which were laid more than 35 years ago are still in service today. An of course, material technology and quality has improved considerably during that time, making the possible lifespan even greater.
One survey in 2001 by the Building Research Establishment (BRE) found the condition of several GRP roofs aged around 25 to 30 years old to still be structurally sound.
While GRP may not be as flexible as rubber or as cost efficient as other methods, it is incredibly resistant to damage and repairs are very easy should they be required, making it’s long life expectancy it’s major advantage.
Factors affecting lifespan
Obviously there are many factors that will affect how quickly the GRP deteriorates:
- Exposure to sun & UV light : The location of the roof and the intensity of the sunlight it receives will affect aging, like most materials.
- Quality of construction: A well constructed roof, that drains well and prevents water pooling, will last longer.
- Type of GRP Used : for instance, our GRP Fibreglass Roofing Kits are available in a 450g or 600g options, the latter will providing a more durable long lasting finish.
- Proximity to trees & vegetation: Build up of debris as well as potential impact damage will have an effect.
- Regular cleaning and maintenance will extend the lifespan of the roof
