How to Clean Mold From an OSB

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Things You'll Need

  • Warm water

  • Spray bottle

  • Cloth

  • Concentrated enzyme mold cleaner

  • Lukewarm water

  • 5-gallon bucket

  • Sponge

Mold grows on many different surfaces and comes in a variety of colors.

Oriented strand board—OSB for short—is a common building material used for roofs, floors and walls. As with any building material, if OSB becomes damp, mold can begin to grow. Mold is an unsightly problem with the potential to cause serious health risks for those who come in contact with it or its spores. The best way to removal all traces of mold from OSB is to use a concentrated enzyme mold cleaner.


Step 1

Add warm water to a clean spray bottle.

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Step 2

Spray the surface mold on the OSB with the water. This will reduce the chances of mold spores being released into the air during the removal process.


Step 3

Wipe the surface mold from the OSB with a damp cloth.

Step 4

Mix a solution of 2 oz. of concentrated enzyme mold cleaner with 1 gallon of lukewarm water in a 5-gallon bucket.

Step 5

Add the solution to a clean spray bottle.


Step 6

Spray the OSB with the enzyme mold cleaner and allow to sit on the OSB for a few minutes.

Step 7

Wipe the solution with a sponge. Continue spraying the cleaner and wiping with a sponge until all the mold has been removed.


Wear an N-95 respirator, rubber gloves, safety goggles with vent holes, long-sleeve shirt and pants during the mold removal process. Open doors and windows to provide adequate air circulation.


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