How to remove mold from sandstone

Written by sal marco
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How to remove mold from sandstone
Remove toxic mould for health and safety. (Jupiterimages/Photos.com/Getty Images)

Sandstone is a natural rock formation, quarried and cut into smaller pieces. Homeowners and masons choose sandstone for patios, walkways, chimneys or foundations because it is durable. Sandstone is most recognisable as a New England dry wall, which is pieces of stone fit together and built without mortar. Depending on the region, sandstone is available in a wide range of colours including black, brown, red or grey. Each piece of sandstone will vary in colour, adding interest to the structure.

Skill level:
Moderate

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Things you need

  • Rubber gloves
  • Safety goggles
  • Mold and particle respirator
  • Chlorine bleach
  • Spray bottle
  • Stiff-bristled scrub brush
  • Antimicrobial spray
  • Fogger
  • Rags

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Instructions

    Chlorine Bleach

  1. 1

    Mix equal parts chlorine bleach and water in a spray bottle.

  2. 2

    Spray the mixture onto the mould generously and allow the bleach to remain on the surface for 10 to 15 minutes. Spray the mould a second time.

  3. 3

    Scrub the mould with a stiff-bristled scrub brush. Rinse the area thoroughly with plain water. Repeat if necessary.

    Antimicrobial Spray

  1. 1

    Spray a commercially prepared antimicrobial spray onto the mouldy surface. If the area is large or there are areas that are not reachable, rent a fogger. To use a fogger, place it in the area that has mould growth, add the antimicrobial agent and release the fogger. The mist will settle onto the mould and kill it.

  2. 2

    Allow the spray to remain on the surface and dry completely. The spray will form an airtight protective coating and suffocate the mould.

  3. 3

    Soak a rag with the antimicrobial spray and scrub the surface to remove mould.

Tips and warnings

  • Wear rubber gloves, safety goggles and a mould and particle respirator.
  • Always wet mould before scrubbing to keep mould spores from releasing into the environment.
  • Repair water leaks to keep areas free of mould.

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