Paint the bathroom ceiling with a high sheen gloss paint.
Mold in attic above bathroom.
Notice how the dark line on the insulation in the photo below line up with the top plate.
Insulate the attic space above the bathroom to prevent excessively cold surfaces on the ceiling.
Http youtu be pne imqvfoy it shows the things we noticed to d.
As air leaks migrates from the home into the attic it carries soot and dust particles.
What causes black mold in attic.
This is why you rarely find mold growth in the attic above a garage or a rarely used portion of the home.
Moisture food and warmth.
Mold species such as stachybotrys chartarum which looks like slimy growth loves attic basement bathroom and space under the sink black mold can also grow behind the walls or attic ceilings completely undetected until the occupants smell the presence or experience health problems.
Matte and other low sheen paints absorb much more moisture which in turn leads to mold growth.
Attics usually have a passive ventilation system in which outside air comes in through the soffit eave vents at the bottom warms up in the attic and escapes through the can or ridge vents at the top because hot air rises.
If you eliminate just one of these elements mold will starve and die.
The most common cause of attic mold by far is blocked or insufficient ventilation of the attic space.
Mold needs 3 things to grow.