The growth of black mould growth on bathroom ceilings and walls is a sign of condensation and in bathrooms there is generally plenty of that.
Mouldy bathroom walls.
Colonies of ants can also detect the presence of black mold.
Bathroom mold occurs primarily because mold loves damp dark isolated spaces says larry vetter of vetter environmental services in smithtown n y.
If tackling a smaller area make sure you wear protective eyewear gloves and a face mask as contact with the spores can be harmful.
Definitely the bathroom is a ground zero if you will for mold growth probably because mold likes to grow in dark damp areas bathroom mold looks unsightly and can irritate allergy.
Mold on basement or exterior walls occurs when water vapor in the air meets a cold surface and turns the vapor into a liquid.
The most common places to find mold are tile grout caulk and painted or wallpapered walls.
The warm air laden with moisture comes into contact with a cold surface and that cools the air so that it can no longer hold the moisture which then condenses on that surface.
Other humid areas include the walls and ceiling near humidifiers and any room with a hot tub or jacuzzi improperly installed indoors.
If you find the colony of small ants gathering in one spot of your bathroom check the spot in case black mold has infected it.
Mould can cause allergic reactions and poor health so if you have an extensive problem with mould on walls it may be best to seek expert help.
Bathrooms and laundry rooms develop mold because they re typically very humid.