Category: Sheds |  By Rick Stoddard

How to Clean Mold in Your Shed


Mold is a stubborn and invasive fungus that can cause serious damage to wood. If left too long the mold can ruin the wood and full replacement of the affected area will be needed. Not only that, but some mold can be dangerous to your health.

Here is how to clean mold from your wood shed:How to Clean Mold in Your Shed

Step 1

Gather your supplies. You will need:

  • A few soft cloths or sponges
  • Warm water
  • Bucket
  • Gentle hand washing dish soap
  • Bleach
  • Empty spray bottle
  • Stiff brush
  • Rubber Cleaning Gloves

Step 2

Open all of the windows and doors to the shed to ensure proper safe ventilation

Step 3

Fill your bucket with some warm water and a few drops of soap. Dampen you soft cloth or sponge and begin with washing the mold to get as much of it off of the surface of the wood as possible.

Step 4

Mix up a bleach solution to ensure all of the mold spores are killed. Combine 1 ½ cups of bleach with one gallon of water and pour the mixture into a spray bottle.

Step 5

Liberally and thoroughly spray down the moldy area with the diluted bleach. If the area is large don’t hesitate to refill the bottle with more bleach solution to make sure all of the mold is liberally coated. Let the bleach sit and go to work on killing the mold for a few minutes.

Step 6

Scrub the bleached area with the stiff brush and then allow the wood to dry completely.

Step 7

With a new clean cloth or sponge wash the area again with warm soapy water and allow the wood to air dry. Be careful not to use too much soap in your final washing process.


Mildew is not only unsightly it can be a pain to clean up. Mildew causes an unsightly green discoloration on surfaces when they are frequently exposed to water. As we come out of the cold and damp winter season it is not unlikely for some sheds to grow some mildew. While mildew is a natural occurrence, it is best to get it cleaned up as soon as you see it to avoid it becoming an even bigger pain to clean or causing green gunk to rub off on clothes.

Here are some steps to get that mildew cleaned up from your wood shed:

Step 1

Grab your supplies. You will need:

  • A gallon size bucket
  • Some regular chlorine bleach
  • Water
  • A second smaller bucket
  • A couple of sponges
  • Some good quality rubber cleaning gloves
  • A glass measuring cup for measuring liquids

Step 2

Mix up a diluted bleach solution. For painted sheds, add ¾ of a cup of bleach to the gallon-sized bucket and fill it up the rest of the way with water. For unpainted and unstained wood a stronger solution of one cup of bleach for every 3 cups of water can be used.

Fill the second smaller bucket with plain water.

Step 3

Put on some rubber cleaning gloves to protect the skin on your hands from extended exposure to the bleach to avoid any irritation. Dampen the sponge in the bleach mixture and gently scrub the mildewed areas. Make sure to wring the sponge out before wiping the walls down and try to use as little water on the wood as possible to avoid further damage.

For more information on our quality custom sheds in Arlington please contact us any time or come by and visit us near Smokey Point.


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