The lack of light in the bathroom would not directly cause the mold growth.
What causes mold spots on bathroom ceiling.
What causes mold in bathroom ceiling.
Mold in the bathroom ceiling is caused by a wide range of factors.
I suggest you call an exterminator.
Having mold in your bathroom can have a huge effect on the health of your household especially if you live with a small child or elderly person.
When a portion of the ceiling stays damp for an extended period of time a yellowish brown mold stain can form overhead.
Black mold or stachybotrys to give the mold its scientific name emits toxins known as mycotoxins that can cause skin and airway irritation.
Left untreated the mold stain may grow and become darker over time.
In addition to being unsightly bathroom ceiling mold can cause permanent damage to your home and is a health hazard for you and your family.
If this list scares you you re not alone.
How the black mold appears in bathroom ceiling can t be apart from the role of humid environment and the same is true with the abundance of water supply.
The shape precisely provides the ideal ground for dingy fungus to develop.
If your bathroom has a high level of humidity for a couple of days mold may start growing in different parts of the bathroom including the ceiling.
Mold on the ceiling is caused by moisture that has no where to go.
Mold may not seem very threatening but the danger.
The main cause of mold on a bathroom ceiling is a broken or ineffective exhaust fan.
I recommend replacing the fan with a constant flow unit such as the panasonic whispergreen fan.
What causes black mold on a bathroom ceiling.
What causes black mold in bathroom ceiling.
How to safely clean mold off of a ceiling.
Here is a link.
If that s outside of your budget you can install a timer switch on the.
Brownish spots on the ceiling can be fluids gross i know from the bugs.
We had a wasp problem a while back and the exterminator asked if there were any brown spots on the walls or ceiling explaining that this is a sign of infestation.
It can be caused by the warm temperature of the room the humidity from baths and showers low levels of natural light and poor air circulation.
It may not have been mold.
Steam from hot showers and bathtubs rises to the ceiling and without proper ventilation it can settle there.
The second cause of ceiling discoloration may be related to moisture but is not directly caused by it.
A humid environment supports mold growth.