Attic Moisture On Drywall Ceiling

House settling and temperature or moisture fluctuations in an attic which result in the expansion or contraction of framing members.

Attic moisture on drywall ceiling.

All attics vented or unvented should have an air barrier a properly detailed airtight drywall ceiling for example regardless of climate. Moisture from the drywall finishing condenses against the cold plastic and dampens the drywall. Second when water condenses and drips off of your ductwork it can cause your ceiling to leak which can rot drywall and cause your ceiling to collapse over time not to mention it looks horrible. Condensation on your ceiling can cause water damage and promote the growth of mold or mildew.

Depending on how tight a house is constructed and the outside temperature even a relative humidity of 30 percent may be too high. Check local codes for specific requirements of your area. Finally and most importantly condensation on ductwork can then drip off of your ducts and feed mold growth. However all attics vented or unvented and in all climates should have an air barrier such as an airtight drywall ceiling.

The most commonly used drywall thicknesses are 1 2 inch and 5 8 inches thick. The standard panel is 4x8 feet although 10 foot and 12 foot panels are available. This is usually because they have not insulated the attic before beginning the drywall finishing. The heat being lost from the house below warmed up the attic so that moisture.

The attic isn t always to blame for ceiling condensation. Typically plaster ceiling cracks have two causes. Moisture resistant drywall is called greenrock and is specially treated for use in bathrooms and other damp areas. It s also incorrect in a way.

The next approach to reducing attic moisture is by controlling air infiltration. If you notice condensation on your windows and walls find peeling wallpaper or bubbled paint or see mold spots around the house your home s humidity is too high. When they do the drywall finishing the drywall on the ceiling may sag from moisture. At higher levels relative humidity condensation can even occur inside of the house on windows cold walls or ceiling surfaces.

Improper ventilation and insulation of home attic space can produce high humidity levels and trap. If the ceiling had been insulated the vapor barrier would have.