Removing and killing mildew

 

Removing and killing mildew

Checklist

  • Rubber boots and gloves
  • Bucket or insecticide sprayer
  • Hot water
  • High-pressure washer
  • Scouring sponge or stiff bristled brush
  • Comfortable old clothes
  • Protective goggles
  • Bleach
  1. Pour 1 litre of bleach and 3 litres of warm water into a bucket or an insecticide sprayer.
  2. Apply solution to the surface, starting from the bottom to prevent runs.
  3. Rub surface with a stiff bristled brush or scouring sponge.
  4. Let solution work for 5 to 10 minutes.
  5. Rinse surface with a power washer. Make sure pressure is no greater than 3400 kPa (500 lbs./sq. in.) to prevent damage to wooden surfaces. Keep nozzle within 30 cm of surface for best results.
  6. Repeat as needed.
  7. Let surface dry thoroughly for 2 to 3 dry sunny days before painting. Surface moisture content should be less than 12%.
  • Please note: Bleach is a non-flammable product useful for eliminating mould that causes mildew. It bleaches and disinfects, but does not remove grease. To get rid of grease, use Polyprep Cleaner with active oxygen 771-135 (liquid) or 771-136 (powder).
Never mix cleaner and bleach directly because the mixture will produce toxic fumes.