Removing Mold or Mildew from Ducts

  • 2-4 hours
  • Beginner
  • 25-50
What You'll Need
Safety goggles
Scrub brush
Empty spray bottle
Rubber gloves
Breathing mask
White wine vinegar
Warm water
Commercial mold and mildew cleaner
Expendable clothing

If you have ducts that are currently being plagued by mold or mildew, you may be wondering how to go about removing it. If so, read on to learn everything you'll need to know about effectively purging mold or mildew from your ducts.

Step 1 - Protect Yourself

Before proceeding to purge the mold or mildew that has infested your ducts, you'll need to don the proper protective gear. You'll need to be wearing a breathing mask, a pair of rubber gloves, and safety goggles at all times. This will help prevent you from developing any rashes or infections caused by exposure to certain types of mold and mildew, as well as shield you from the adverse effects of prolonged exposure to the bleach you will be using. In addition, you should wear worn-out or expendable clothing when performing this task, as this can be a dirty job.

Step 2 - Begin Cleaning

If the mildew or mold deposits that are plaguing your ducts don't seem particularly serious, you can try purging them with a commercial mold and mildew cleaner or a mixture of 1/4 cup of white wine vinegar and warm water. Should these cleaning solutions fail to do the job, bleach is your best bet.

Pour some bleach into an empty spray bottle and open up any mold or mildew-laden ducts. You'll now need to vigorously apply bleach to the areas that have fallen victim to mildew or mold infestation. Next, allow the bleach to sit for several minutes. Giving your bleach ample time to set in will soften up the mildew or mold, ultimately making the removal process easier. Many people tend to find the smell of bleach overpowering, so if you begin to lightheaded, take a break, preferably one that involves fresh air. Additionally, make sure the area in which you are performing this task is properly ventilated.

After the bleach has sat for a few minutes, proceed to wipe away any mildew or mold deposits with the aid of a sponge, scrub brush or washcloth. While you should be able to successfully wipe away most types of mildew and mold with a sponge or washcloth, particularly stubborn types of mildew and mold will require you to use a hard-bristled scrub brush. Once all the mildew or mold deposits have been purged, you may proceed with the final step.

Step 3 - Apply Your Finishing Touches

You'll now need to fill an empty spray bottle with cold water and thoroughly spray down the freshly cleaned ducts. Once the ducts have been vigorously sprayed, proceed to dry them with a washcloth. When drying your ducts, it is important to be thorough, as mildew and mold have a propensity for forming in damp, enclosed areas. With areas as enclosed as ducts, even a little bit of moisture can give way to the formation of mold or mildew, so remember to take your time when performing this final step.