Many old Australian homes were built using asbestos roofing that was identified as a health hazard. Asbestos roofing replacement especially becomes dangerous when the roof shifts or breaks as asbestos fibres are released into the air. Asbestos roof replacement is a process that requires professional expertise due to its sensitive nature. Replacing an asbestos roof is a multi-stage process that requires an evaluation of the roof, maintenance, removal and installing of a new roof. To determine whether your roof contains asbestos, samples of your roof are sent to the National Association of Testing authorities for testing. After identifying the process of replacement, the next step is the replacement. The asbestos roof replacement is as follows:
Removing the asbestos roof
Removing the asbestos roof is a complicated process. The first step in removing the roof is spraying it with PVA glue that sets the asbestos fibres and prevents them from being disturbed. Some roofs may have other installations aside from the roof sheets such as solar panels that are also removed carefully to prevent breakage. Next, the screws holding the roof sheets in place are removed, and the roof sheets are carefully lowered to the ground to prevent breakage. The sheets are then wrapped in builders plastic to ensure the asbestos is carefully sealed. After removal and wrapping, the asbestos sheets are taken to a disposal facility.
The next step is a thorough cleaning of the roof and ceiling cavity with industrial-grade vacuums. The walls of the house may also be cleaned to remove any displaced fibres. Lastly, PVA glue is sprayed to ensure that the asbestos contamination is removed.
Installing a new roof
Asbestos roof replacement starts with removing the contaminated roof and putting in a new roof. The contractor takes correct measurements of the roof to give you an estimate of the cost of roofing materials and labour. The existing roof structure is inspected to ensure it can support a new roof. Any damage that may have occurred is repaired. A new roof is installed depending on the owner's choice of roofing material. After a new roof is installed, additional roof features such as chimneys and seals are installed. The roof is cleaned to remove any dust. The last step is the re-installation of other roof components such as solar panels and aerials to the new roof.
The cost of asbestos roof replacement and asbestos removal service will vary as different contractors charge different prices. The cost will, however, be worth it in the end.