Attic Moisture On Drywall Ceiling

Improper ventilation and insulation of home attic space can produce high humidity levels and trap.

Attic moisture on drywall ceiling.

When they do the drywall finishing the drywall on the ceiling may sag from moisture. Omitting a ceiling vapor barrier by arguing that you have to let the moisture escape or because the house has to breathe out the top is actually correct in a way. 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. House settling and temperature or moisture fluctuations in an attic which result in the expansion or contraction of framing members.

If the ceiling had been insulated the vapor barrier would have. The heat being lost from the house below warmed up the attic so that moisture. At higher levels relative humidity condensation can even occur inside of the house on windows cold walls or ceiling surfaces. Typically plaster ceiling cracks have two causes.

Before the introduction of attic insulation attics in cold climates were poorly insulated and plastic ceiling vapor barriers were omitted. All attics vented or unvented should have an air barrier a properly detailed airtight drywall ceiling for example regardless of climate. The standard panel is 4x8 feet although 10 foot and 12 foot panels are available. However all attics vented or unvented and in all climates should have an air barrier such as an airtight drywall ceiling.

The next approach to reducing attic moisture is by controlling air infiltration. Sometimes your daily activities add more humidity to the air than your home can handle leading to a buildup of moisture. Finally and most importantly condensation on ductwork can then drip off of your ducts and feed mold growth. The most commonly used drywall thicknesses are 1 2 inch and 5 8 inches thick.

Depending on how tight a house is constructed and the outside temperature even a relative humidity of 30 percent may be too high. The attic isn t always to blame for ceiling condensation. It s also incorrect in a way. 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.

Moisture resistant drywall is called greenrock and is specially treated for use in bathrooms and other damp areas. This is usually because they have not insulated the attic before beginning the drywall finishing.