Fibro asbestos roofs undergo a breakdown process similar to the rusting of metal roofs.
Asbestos roof sheets were constructed using Portland cement, water, then reinforced with asbestos fibres.
This photograph shows the extent of the breakdown of the surface of aged asbestos roof sheets.
Losing the surface cement through weathering, the roof sheets become thinner from the upper surface.
They then change to a darker colour and so attract more heat, being of limited flexibility, the roof sheets then expand and contract and eventually crack.
You can liken this process to a metal roof undergoing the process of becoming rusty; you can treat the rusted areas, or wait until the roof sheet disintegrates through rusting, then replace it.
The same applies to aged asbestos roofs. Currently there are only two ways to stop this breakdown process, one is to remove and replace the entire roof, or repair and treat the surface of the roof with an encapsulation coating.
Asbestos Roof Solutions Pty Ltd, assess many aged asbestos roofs per year and are the number one applicator for the Fibroseal asbestos roof encapsulation system, manufactured by Crommelin in Western Australia. This system held the C.S.I.R.O. (APAS Certificate 1720/2).
For a professional assessment of your fibro asbestos roofs current condition, contact Asbestos Roof Solutions direct on 0408 418 630
August 14th 2018
