Aged asbestos Super 6 roofs are continuing to deteriorate and are a cause for concern for the health and safety of the community.
Asbestos cement (fibre) roofs have been a high performing product and there are many roofs around New Zealand that are into their fourth or fifth decade of service, without any maintenance ever having been done. However, asbestos roofing undergoes a weathering process after many years of exposure and a loose surface layer develops which becomes colonised with lichen. The lichen secretes oxalic acid and attacks the cement, causing exposure of the asbestos fibre. The surface becomes unstable, the asbestos roofing is weakened and the darkened colour causes a substantial increase in roof cavity temperatures. As the deterioration progresses over time, the composition of the roofing material becomes brittle and friable.
In the 1980's the use of asbestos was discontinued in the production of fibre reinforced cement sheeting, but the existing roofs continue to age and deteriorate.
You can extend out the life of your asbestos roof for further decades by having it encapsulated before it becomes friable, and save you a costly reroof. Just the dismantling and disposable of the asbestos roofing alone is about around the cost of a new roof to replace it.
Asbestos Roof Encapsulation can achieve the following:
1. Bind and encapsulate the asbestos fibres.
2. Waterproof your roof.
3. Avoids costly downtime associated with roof replacement.
4. Gives a significant reduction in roof cavity temperatures resulting in savings of air conditioning costs.
4. Gives an extension of the service life of your asbestos roof.
5. Provides a rejuvenated appearance.