Updated at: 30-05-2022 - By: Helen Skeates

Your wall should be free of vines or tree branches so that it may be exposed to sunlight. To prevent mold from forming on vinyl siding, use these tips.

Because of its aesthetic appeal and inexpensive price, this material is gaining popularity among homeowners. When neglected, it is vulnerable to water damage and the growth of mold.

What Is Vinyl Siding?

This substance serves as a second layer of protection for your home’s original walls. It’s made of Polyvinyl Chloride (P.V.C.), and it’s one of the most affordable siding materials.

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Low-maintenance and simple to install are two of the advantages of this product. Because of this, vinyl siding is a popular choice for exterior walls among many homeowners.

Vinyl siding is also more cost-effective than other materials because it doesn’t require painting. The colors have been baked into the sheets, making it difficult to remove.

It’s an excellent option for the home because these sheets come in beige or pastel colors. Richer hues are also being developed by some producers for various structures.

Causes Of Mold On Vinyl Siding

However, vinyl siding has the drawback of being susceptible to water damage. Owners that fail to properly maintain their property are to blame for this issue. Mold can grow because of the water damage, and it could pose a threat to your family’s health.

Lack of sunlight

Your vinyl can become saturated with moisture if it is constantly exposed to the sun’s rays. Mold and other types of rot thrive in damp environments.

Tree or vine sap

A future problem may arise if trees are planted too close to your house’s siding. A buildup of aerosols from these plants will collect on your wall, feeding the mold spores.

Too much moisture

Water can leak through the pores in your vinyl siding if it remains on the surface for an extended period of time.

Why Does Mildew Grow On Vinyl Siding?

Adding vinyl siding to the exterior of a home is a popular choice because of its durability and affordability. The negative to vinyl siding is that it is susceptible to mold and mildew growth. It’s a good idea to learn more about mildew and mold on vinyl siding if a homeowner is thinking about adding vinyl siding to their home or is worried about the material they presently have. To be more specific, it’s beneficial to learn about the causes of this problem.

Buildup Of Dirt

Dirt accumulation is one of the most common causes of mold and mildew on vinyl siding. Because fungus feeds on dirt and dust, the siding will appear dirty, and this can lead to mildew. If the house is close to trees, the sweet sap from the trees may end up on the siding, which is an attractive food source for fungi.

Excess Moisture

It’s possible that mildew and mold are also caused by moisture on or under the vinyl siding. If rainwater is accumulating behind or even within the siding, it is possible that a leak has occurred. It’s also possible that the siding is always damp because of a broken drain pipe or gutter. As a result, mold and mildew are likely to grow on a house.

Lack Of Sunlight

When it comes to mildew and mold growing on vinyl, there are more than just dirt and moisture to blame. Mold and other fungi grow in dark regions, thus a fungus problem is more likely to develop in an area of the house that is permanently shaded. Sometimes, a tree, shed or porch roof blocks sunlight from one side of the home. Removing this source of shade can help keep vinyl siding free of mildew and mold.

Preventing Mildew And Mold On Vinyl Siding

Preventing the formation of fungus on siding should begin with removing any sources of moisture, sunlight deprivation, or filth that may be contributing to it. That’s not always the case, of course. Some trees and other shade structures may have to be removed in order to keep a house dry and clean. To prevent mold and mildew from growing on siding, there are other options.

Fungus growth can be prevented without major alterations to the property by using effective cleaning chemicals on the siding. Mold and mildew stain prevention can be achieved by using 303® Mold & Mildew Cleaner + Blocker from Gold Eagle. Because it doesn’t contain bleach, this cleaner’s recipe is effective against mold and mildew growth while being gentle on water-safe surfaces. If you want to clean vinyl siding, upholstery, and more, this is the product for you. It’s also safe to use on boats.

Mold and mildew on vinyl siding can be prevented or treated with a variety of Gold Eagle solutions. Learn more about mold and mildew prevention with the help of the cleaning products we offer.

What To Do Once You Spot Mold Infestation

The first step in dealing with mold is figuring out how it got there in the first place.

1. Check the drain pipes and rain gutters

These pipes need to be de-clogged if any drips are observed. Occasionally, the source may be on your roof, and the water seeps down into your sidings from there.

Get an expert to inspect and repair your roof. Here’s a breakdown of roof repair costs.

2. Inspect your ventilation ducts

In these ducts, mold will thrive because of the steam. Make sure the exhaust isn’t condensing at all times.

3. Monitor your sprinklers

It’s possible that you installed your sprinklers too close to your wall, which resulted in mold growth. Make sure your sprinklers are facing away from the walls and are in good working order.

Step-By-Step Process On Removing Mold From Vinyl Siding

The mold in your walls must be removed once the leak has been repaired. A few simple ingredients are all that are required for this short procedure. Use gloves, a mask, and goggles to protect yourself from the flying spores.

Step #1. Wash the area

Use a garden hose or a pressure washer to remove loose dirt.

Step #2. Apply a cleaning solution

Make your own cleaning goods at home, or utilize commercial cleaning products. Mould-killing cleaning products include

  • Soap the dishes
  • bleached by oxygen
  • Vinegar with a white color
  • Sodium hypochlorite (or bleach)

Before using these items on your siding, be sure to dilute them with water.

Removing Mold and Mildew from Vinyl Siding - Pennysaver | Coupons & Classifieds

Step #3. Scrub the area

Mold can be removed with a soft-bristled brush or a damp cloth.

Step #4. Rinse the area

Dispose away the cleaning agent with a hose. After you’ve finished washing your siding, allow it to air dry in the sun.

How To Prevent Mold Formation

Water damage and mold are the worst things a homeowner can do to their siding! The following are some helpful hints.

1. Have direct sunlight

Keeping your sidings out of the shade will help to keep mold at bay. The spores that land on your walls can be killed by the high temperatures in your home. What temperature does mold die? Here’s a guide.

2. Trim the trees and bushes

Mold spores thrive in the sap of these plants, so make sure your garden is free of mold and debris so that your siding receives plenty of direct sunshine.

3. Have a regular cleaning schedule

Perform cleaning and maintenance procedures on a regular basis. To save money, turn to the cleaning supplies you already have at home and make your own.

4. Use a mold-resistant cleaner

A mold-resistant cleaning agent is ideal if you’re using a commercial cleaner. Your siding will be shielded from the spores that fly around.

5. Remove moss

If you don’t keep an eye on your siding, moss can grow on it. Mold can thrive in a wet environment caused by these plants.

6. Maintain the rain gutters and ventilation ducts

Water damage and mold growth are also possible outcomes of leakage from these lines. Make sure they’re in good shape and free of cracks.

7. Adjust your sprinklers

Install sprinklers away from your siding and don’t put them too close to your home.


How do you keep vinyl from getting moldy?

Siding should be cleaned with a garden hose and a gentle brush on a regular basis to prevent mold growth. Mold can attach to any surface since it travels via the air. Cleaning on a regular basis keeps buildup at bay and makes it easier to spot mold before it has a chance to take hold.

What can I put under vinyl to prevent mold?

Moisture barrier is just an interlayer between the vinyl flooring and the subfloor to prevent any moisture from accessing the vinyl. Underlayment with a built-in one is also available.

What can I spray on vinyl siding to prevent mold?

Using a solution of liquid dish soap and water, wash your home once a year to keep mildew and algae at bay. Prevent algae and mildew from having a feast by cleaning the siding of carbohydrates.

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Is vinyl siding mold resistant?

Cracks, chipping, and fading are not problems for vinyl siding. However, this does not mean that vinyl siding is immune to mold. Vinyl siding, for all its sturdiness, is vulnerable to the growth of mold and mildew.

How do you keep moss from growing on vinyl siding?

To prevent moss from forming on the exterior of your home, spray it with bleach once a week. Moss is more prone to grow after a hard rain, so you should spray the siding thoroughly.

Does dehumidifier stop Mould?

Condensation, mould growth, and dampness on walls can all be prevented by using dehumidifiers to remove excess moisture from the air.


Mold may eat away at vinyl siding, which is a terrific option for your house. This dire catastrophe must be averted, and it is up to you to do so.

You can keep your walls clean when you know how to prevent mold on vinyl siding. Your lovely home will be protected from mold.

Mold on vinyl siding can be prevented if you know how to do it. Mold will be kept at bay in your wonderful property.