Clothes dryers venting air to the attic rather than outside.
Attic ceiling wet.
If you have access to the attic space enter the attic and look for the spot where water is dripping down from the roof sheathing above.
If the problem is the result of water or moisture penetrating the foundation or floor slab there are many remedial actions which may help.
Not enough insulation on the ducts themselves.
Pipes may burst or crack after years of long use leading to leaks in the ceiling.
In summer when the air conditioning is on the reverse happens.
The actual roof damage may be located directly over this spot or it may be located further up the roof line if the water has been flowing down the sheathing or a rafter before falling to the floor of the attic.
The most common cause of ceiling condensation is an attic with too little insulation and ventilation.
Top causes of attic moisture.
Basically when the cold air from your air conditioner mixes with the warm moist air in your attic condensation happens.
The best solution for controlling moisture is at its source.
A leaky pipe is a disaster waiting to happen since even mild leaks can lead to considerable damage to your home s walls ceiling flooring and foundations.
Also it is possible for dirt or debris to become lodged inside.
Inadequate ventilation attics must be vented to allow moist warm air to escape.
In an attic like this wintertime ceiling condensation can form when cold air from the attic hits your warm ceiling.
Improper ventilation and insulation of home attic space can produce high humidity levels and trap.
Prolonged wetness will rot out the roof sheathing.
And then it drips down onto your ceiling creating nasty water marks.
There are 3 common culprits of this problem.
If water is dripping from your ceiling and your furnace and or air handler is located in the attic the most likely cause is a clogged condensate drain line.
The same thing can happen with your ac system and vents.
If you have ceiling leaks only in the spring it may be that ice has been forming on the sheathing all winter and it suddenly melts when a warm spell arrives.
There are many signs that an attic is wet.
Often this is first noticed when re shingling.
Insulation in the attic is soaking wet.
These can include installation of seamless gutters and downspouts.
Condensation on your ceiling can cause water damage and promote the growth of mold or mildew.
Air conditioner condensate pan not draining.