Graphical Construction Glossary >> Roofs and roofing. >> Roof Features >> vermin proofing

Vermin proofing

Protecting a building against the entry of rats and mice and other vermin. Particularly at the eaves. Usually by expanded metal mesh. This is mandatory under the BCA in Australia.

Mesh is used where the eaves are unlined of course. When access to the roof is sealed by the cladding or sheet lining then that does the job.

Any type of mesh will do for this job, but the mesh in the photo, known as expanded mesh, is ideal because it keeps it's shape fairly well in the flat sheet, but when it is made to size with a couple of folded turns to make it into a flat "U" shape it is firm and easy to work with. The mesh can be cut easily with tin snips.

Any opening like at eaves, ridge and gable vents should also have some sort of mesh protection.

For a neat looking job and by far the easiest way is to fix the mesh from the roof before the roof sheeting is installed.

Another way of complying with the regulations is of course to line the eaves with compressed cement sheets.

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