Generally speaking attic moisture problems that lead to mold growth are most often caused by.
Possible reasons for moisture in attic.
Common signs of moisture in your attic musty smells frost ice on cold surfaces in the wintertime foggy windows condensation on windows or other smooth surfaces visible mold wood rot the deterioration of masonry the staining discoloration or warping of construction materials.
Blocked or insufficient ventilation improper exhausting of bathroom fans or dryer vents.
Fixing this issue can be less costly than replacing a roof but it should be addressed as soon as possible.
Even a small pin head sized hole can send gallons of water pouring into your attic over the course of a couple months.
Finding water damage on the wall or ceiling is worrying for any homeowner.
In other words you cannot have a mold problem without a moisture problem.
Rust moisture frost and ice buildup on roofing nails dark stains moisture or frost on the roofs sheathing water or drip marks scattered on the attic floor buckled or damaged roof sheathing moist or wet insulation.
And to make matters worse these holes are not easily identified unless it s raining.
Moist air is created from everyday activities including cooking.
In the first instance you need to try and reduce the amount of moisture vapour penetrating into the attic in the first place.
Water found in these places is commonly caused by condensation in the attic.
Most people assume this is caused by a leaking roof but that might not be the source.