How To Remove Mildew From Exterior Paint: 2-Part Process

Were you trying to learn how to remove mildew from exterior paint? We got you all covered up!

Mold on a home’s exterior might appear unattractive green or black blotches near the ground and in areas where plants may block sunlight. Mold and mildew grows and develops in the dark, damp regions with inadequate air circulation, even outside the house. 

how to remove mildew from exterior paint

Cutting back on the greenery and correcting the atmosphere in wet, gloomy areas can help prevent mold in the future. Go check this article about how to clean mildew off brick to help you with the basic steps.


Part #1. Getting The Setting Ready

Step #1. Put on a mask or a respirator. Test spraying and cleaning it in an inconspicuous location to guarantee that vinegar does not damage outside paint

Step #2. To dampen the mold, spray the area with a garden hose. Allow for 30 minutes of drying time or until the area is moist but not drenched.

Mold in damp spaces is easier to remove without releasing spores into the air.

Step #3. To assist in preventing the mold from returning, cut back the foliage and remove any impediments. Because vinegar can harm plants, remove any foliage you desire to maintain.


Part #2. Mildew Remediation

Step #1. Combine 3/4 cup vinegar and 1/4 cup water in a mixing bowl—test spraying and cleaning it in an inconspicuous location to guarantee that vinegar does not damage outside paint. 

Note: Allow 12 to 15 minutes for the vinegar to sit in the test area.

Step #2. Thoroughly rinse the test area. Clear the mold with simple water and a scrub brush if the vinegar damages the paint.

Avoid scratching the paint and causing peeling. If the test place is unaffected, it is safe to remove mold from the rest of the exterior with vinegar.

Step #3. Using the vinegar and water mixture, liberally spray the afflicted area. The vinegar saturates the area and avoids grass and decorative foliage.

Allow 12 to 15 minutes for the vinegar solution to dissolve the mold.

Step #4. Scrub the mold away from the paint using a soft brush. Scrub in mild circular patterns, being careful not to scratch the paint or create flaking or peeling.

Scrubbing off the mold produces sludge, easily removed with a washcloth.

Step #5. With a garden hose, wash the entire exterior, being careful to remove all evidence of mold and vinegar from the walls and the ground below. To completely remove mold spores from the foundation and walls, wash from top to bottom.

Tip: Plants that allow for improved aeration of the environment could be used more effectively along the home’s façade.


Mold And Mildew On The Surface

While removing mildew and mold from your home’s exterior may not be tough, it will require a lot of effort. Fortunately, otherwise, eliminating surface mold from home isn’t too tough. 

Mildew removal can be done in two ways, one of which uses a labor-saving gadget. The first method involves utilizing a bucket and a variety of brushes. 

You might want to have a scrub brush and a brush attached to an extension handle so you can reach the higher corners of your house. Fill the bucket with a gallon of warm water and a cup of bleach to clean the surfaces. 

To speed up this method, you can use a chemical called trisodium phosphate, or TSP. Scrub the afflicted regions with the brush that has been soaked in the solution.

If mildew is just affecting a small section of your property, it may be easier to put them in a spray bottle and spot clean issue locations. After you’ve finished scrubbing, rinse the surface with your outdoor hose.

A pressure washer is another option for eradicating surface mold. You can wash your house with or without a cleaning solution since the jetted water scours the surface and removes mold and mildew. 

It may also help remove loose paint, which is a plus when getting ready to repaint your home. Learn more about mildew prevention in this article on how to remove mildew from concrete.


Mold On A Large Scale

You may find that after carefully cleaning the surface mold from your home’s exterior, there are still some areas where the mold appears to have penetrated deeply into the paint or surface material. It’s crucial to get rid of the mold since it could reappear after the fresh paint is put in, shortening the paint’s lifespan. 

You’ll need a stronger cleaning solution to achieve a deeper clean on molded external surfaces. Apply a second solution of half water and half bleach to the surfaces.

To protect yourself from the chemicals, wear goggles and gloves.

Allow at least 12 minutes for the solution to rest on the afflicted surface after spraying or brushing it on. This will make the solution penetrate the skin and reach the deep-seated tumors.

Repeat as needed until the mold is gone, then thoroughly clean the surface and let it dry.



Before applying new paint to your home, you must first prepare the surface. This includes sanding rough edges, eliminating dirt and mold, and removing peeling paint. 

Due to the obvious moisture and exposure to mold spores, mold and mildew can regularly see on painted areas of the exterior of your place. That is a good wrap on how to remove mildew from exterior paint.

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