Avoid and eliminate mold on the window seal

Any window seal is susceptible to the formation of mold. In some cases, the causes are structural defects or the ventilation behavior. Depending on the intensity and strength of the infestation, mold can still be removed; in some cases, only replacing the window seals helps.

Find the cause and fix it

The window represents the link between temperature differences inside and outside. Depending on the weather and heat, there are temperature differences that cause mold to form. If the window seals are not tight enough, for example due to age-related porosity, the window seals must be replaced. One structural reason could be the existence of a cold bridge in the window sill. In this case, the insulation of the window sill needs to be improved.

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Mold formation on the window seal can often only be avoided through conscious ventilation behavior. In the majority of cases, condensation water is the trigger and breeding ground for spore formation. The same physical laws apply here that are also decisive for combating mold in the basement. Warm air binds more moisture than cold air, so that in heated rooms, for example, condensation water is created by the air cooled on the window pane.

How to avoid and remove mold on the windowsill

  • Special mold remover or
  • Vinegar essence or
  • Rubbing alcohol (70 percent)
  • Possibly new window seal
  • Absorbent cotton rag
  • Microfiber cloth
  • Spray bottle (€ 12.99 at Amazon *)
  • Breathing mask
  • Thermometer and hygrometer

1. Burst ventilation

As a measure to prevent mold, you should ventilate at least three times a day for five to ten minutes. In the summer, keep the windows as close as possible or open the wings completely. Tipping ventilation favors mold formation.

2. Keep dry

Place a constantly achievable absorbent cotton or terry lug beside the window and wipe down condensation regularly.

3. Remove spurs

Spray the window seals with a special mold remover that exists for rubber and silicone. Let him act according to the manufacturer and wipe with a microfiber cloth. After that, no discoloration such as typical black points may be more visible on the window seal. Alternatively, you can use cleaning alcohol.

4. Replace the seal

In residual spores, you absolutely exchange the infested window seals, as mold is very harmful.

Tips & Tricks You can use a thermometer to measure the surfaces of the walls and window sill and look for thermal and cold bridges. You can organize your ventilation behavior with a hygrometer next to the window. Define values for forced ventilation.