Dark stains on your walls? Here’s what they reveal (and how to remove them)

Air out the room morning and evening for at least 10 minutes.

Clean stains with warm water and white vinegar (avoid vinegar on stone or marble).

For tougher stains, use hydrogen peroxide.

Leave space between furniture and walls to improve airflow.

Use a moisture absorber or electric dehumidifier if humidity stays high.

During winter, briefly open windows morning and evening to remove condensation.

Add tea tree essential oil to your cleaning solution for antifungal benefits.

how to prevent recurrences

Improve ventilation: install or upgrade a VMC or air extraction system.

Monitor humidity with a hygrometer (ideal range: 40%–60%).

Use anti-humidity paints on sensitive walls.

Consult a professional for suspected infiltration or insulation defects.

Avoid painting over mold or using unventilated gas heaters.

if stains persist
Persistent marks indicate deeper structural issues. Check:

Roof, exterior walls, and water drainage.

Possible rising damp (solutions: resin injection, anti-saltpetre treatments).

Hire a qualified RGE professional for diagnosis and repair.
If you rent, report the problem to your landlord immediately—mold can harm health.

final note
With vigilance and proper methods, you can eliminate dark stains, protect your health, and restore a fresh, clean home environment.