Bitumen-impregnated corrugated fibre cladding – impact damage

Bitumen-impregnated corrugated fibre cladding – impact damage (particularly in cold conditions)

Causes

Stones, balls, vehicles

Cladding at end of its serviceable life

Cause

Stones, balls, vehicles

Repair

  • for small holes or cracks, remove loose material and dust. Fill with an exterior grade polyester filler. Sand, prime and paint with a minimum 2 coats of good quality acrylic paint
  • for larger areas of damage in very visible areas of the building, replacing the entire damaged sheet is likely to provide the best solution
  • where the damage is in a location not visible, or a short-term solution is required, trim the damaged area to a regular shape, removing all loose or broken material. Cut a patch of cladding material with the same dimensions of corrugations to a size larger than the damaged area and fix in place with exterior grade construction adhesive. Fill any remaining cracks or holes with exterior grade flexible polyester filler. Sand, prime and paint with at least two coats of good quality acrylic paint

Cause

Cladding at end of its serviceable life

Repair

  • replace the cladding. If it has performed satisfactorily for over 15 years, it can be replaced with a comparable lightweight cladding material without a building consent. The work should follow the requirements of the Building Code
  • if the cladding did not prove durable for 15 years, or it will be replaced with a very different type of cladding, replacing it is likely to require a building consent. Discuss your plans with your local council