How To Kill Mold on a Window Sill

It may seem surprising, but window mold is quite common. Many windows are not insulated very well, which leads to condensation. As a result, mold can grow on the glass, the sill, or even on your walls. We cover to prevent window mold and the best way to kill mold on your window sill.

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What Causes Mold on a Window?

Since many older windows are not well insulated, condensation forms on the sill or glass. This is most common when there is a big difference between the temperatures inside and outside.

The longer the glass or sill stays wet, the bigger the chance of having mold. In some cases, the mold can spread to your walls as well.

Although you may think mold on your window is more likely during hot, humid weather, it is just as likely during the winter. As long as there is moisture, many types of mold will grow in the winter.

If you do not kill mold on your window, it can eventually rot the casing or the wall. Even with metal or vinyl frames, mold will damage the caulk and cause more problems in the future.

How To Prevent Window Mold

The best way to prevent mold on the window sill is to limit moisture and improve air circulation. Open your blinds and curtains regularly so air can flow closer to the glass. The sunlight will prevent condensation from forming and limit the chance of mold.

If you have condensation, dry the window off with a clean towel. As a precaution, wipe down the glass, sill, and walls with some bleach. It will disinfect the area and limit your chances of mold.

Also, insulate your windows with a vapor barrier in the winter. While insulation kits are available, all you need is plastic sheeting and masking tape.

Place a layer of plastic against the window and seal around the edges with the masking tape. Make sure you completely seal the edge or condensation can still form.

For added protection, you can install a second layer of plastic sheeting on the wall around your window frame. Again, use the masking tape to seal the entire sheet of plastic.

How To Kill Mold on a Window Sill

If you already have a problem, you can kill mold on your window sill or even the glass with bleach. Add one cup of bleach to a gallon of water and then use a rag to kill the window mold. Once the mold is gone, use a fan to make sure the area is completely dry.

To keep the mold from returning, you need to increase airflow and keep the window dry. If the condensation returns, it’s only a matter of time before the mold will too.

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Tired of cleaning mold every couple of weeks? Call 1-888-681-1071 now for a free estimate on mold removal services.

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