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The use of Asbestos Cement (AC) was banned in new buildings in 1990 due to growing concerns about the health hazards posed by asbestos fibre release, especially during construction and maintenance. However existing buildings fitted with AC roofing materials including the familiar corrugated roof sheets and cladding can continue to provide useful and safe service for many years providing they are correctly maintained and managed.
Every property owner has a legal duty to identify the presence of known asbestos containing materials (ACMs) and owners/occupiers of commercial premises must maintain an asbestos register. In most cases an independent survey will be carried out by a BOHS trained surveyor who will take samples for analysis to identify all ACMs, including the roof/cladding. Asbestos Cement corrugated sheets have quite a distinctive appearance and therefore analysis will almost invariably confirm it to be AC.
Asbestos in its solid or settled form, is relatively safe. However, when disturbed by damage or poor working practice, it can release a cloud of fibrous particles, which if handled without appropriate safety equipment and work-wear can result in respiratory distress. As a general rule AC sheets are best sealed or encapsulated to contain fibre release.
If applying by high pressure spray, we recommend a typical GRACO 4900 or 5900 series airless sprayer with the pressure set at 2500 psi and fitted with a 517 nozzle tip blade (17 thou) for optimum performance. Ensure that roof-lights and vents etc. are protected from over-spray and take precautions to avoid spray drift contamination of vehicle finishes in the vicinity.
Apply only in dry conditions to a dry surface, with no rain expected for at least 24 hours post application. As with all water based treatments, please be aware that you need to plan any exterior works to allow sufficient drying time for the product to cure before the evening dew point, especially in the shorter days of winter. On a roof surface warmed by the summer sun "Kingfisher Asbestos Roof Coating" will dry in under an hour, permitting two coats to be applied in one day whereas in winter initial cure can be 4 hours so only one coat is possible.
IMPORTANT! Asbestos Cement roofs can be very fragile and must only be accessed with caution using the correct weight spreading crawler boards, harnessing, access platforms etc. We are primarily coatings manufacturers NOT Health & Safety advisors and as such we do not offer definitive guidance on "working at height" or "working with asbestos", so we recommend that you consult a competent person or Health & Safety professional for guidance on all aspects (PPE, best practice etc.) before commencing any works.
Bio-Wash Green Algae Remover is a concentrated cleaner designed to remove green algae, mould, and organic stains from external surfaces, such as patios, walls, and paving. Each 5L container treats up to 125m² and is perfect for restoring surface appearance or prepping for sealing or painting. It’s easy to apply using a brush or garden sprayer and works deeply to help prevent future growth.
Asbestos Roof Sealer and Primer is a brush or spray applied, translucent solution formulated to bind, seal and consolidate the surface of old, friable asbestos roof sheets, encapsulating harmful dust and fibres. It also improves the moisture resilience of the surface. Non-hazardous, suitable as both interior and exterior asbestos sealer.
