Bitumen-impregnated sheets – deterioration of factory finish

The surface finish of bitumen-impregnated cellulose (wood) fibre corrugated sheets has degraded over time

Causes

Surface degradation due to age

Weathering

Listed under: Roof, cladding, roof cladding, bitumen-impregnated sheets

Cause

Surface degradation due to age

Repair

  • if the product is under warranty, contact the supplier
  • prepare and paint in accordance with the manufacturer’s instructions
  • if the roof is at end of its serviceable life, it should be replaced. A building consent will be required as a different roof cladding will have to be used 

Back to top

Cause

Weathering

Repair

  • if weathering has resulted in premature failure and the product is under warranty, contact the supplier
  • prepare and paint in accordance with the manufacturer’s instructions
  • if the roof is at end of its serviceable life, it should be replaced. A building consent will be required as a different roof cladding will have to be used 

Back to top