Repair Leaking Asbestos Cement Roof

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Repair leaking asbestos cement roof.

Replace the plumbing vent boot if necessary and use washer head roofing screws to secure the base to the roof. Although it s tempting to resort to commonplace products many are bitumen based meaning they re affected by uv light and can easily crack in the cold. Asbestos roofing should not be left un coated or unprotected and in sealing the fibrous cement sheeting these asbestos compatible paints and coatings will prevent water damage or water seeping through to the underlying substrates and building architecture. Areas around asbestos sheets such a roof tiles flashings box gutters service ducts outlet pipes and areas which require a flexible coating can also be protected and repaired using specialist paints and associated waterproofing.

Where cracks are obvious c rack repair tape is a fast way to stop leaks in asbestos cement roofing but not all tapes are the same. Either of these situations could allow water to find its way into the house. If the boot is in good condition but fasteners are missing replace them with washer head roofing screws. Once the primer is dry apply an elastomeric sealant to the cracks corners and damaged areas and then to the entire roof.

Fill in large cracks with mortar or roofing cement then apply a good concrete primer. Follow up with a second coat after 24 hours have passed.