08:45AM | 11/30/02
Member Since: 11/22/02
4 lifetime posts
For the past six days I've had intermittent (off & on) dripping from the attic space into the living room at a built-in, floor-to-ceiling bookcase. I suspect a condensation problem in the attic since there has been essentially no precipitation for the past month, except for very light frost some mornings. There is no visible condensation in attic, however. The home is a ranch style about 34-35 years old on its second set of shingles. There is also evidence of water damage (ceiling plaster sags) near the bookcase and in a nearby closet which may have occurred earlier (don't know when!). Since this started my power attic ventilator fan has been running "24/7", furnace humidifier has been shut off (R.H. 33%-40% in living area) and outside air temp 20-40 deg F. Attic insulation is 6" fiberglass batts covered by approx 6-8" blown cellulose. There are no water pipes in the attic. Is it just a matter of time before the attic dries out or what? The "off & on" characteristic bugs me! Ideas, anyone?


10:28AM | 11/30/02
Member Since: 06/03/01
324 lifetime posts
Sounds like inadequate ventilation - regardless of the power vent. Check that the eve vents are open (not covered, etc) and that there is adequate ventilation high up on the roof line. Is it possible that there are no eve vents? Sometimes the attic insulation is improperly installed and covers these vents up blocking adequate ventilation. May have to install plastic vent troughs that allow air to circulate from the eve vents up thru the attic.

[This message has been edited by LDoyle (edited November 30, 2002).]

[This message has been edited by LDoyle (edited November 30, 2002).]


10:36AM | 11/30/02
Are there any HVAC ducts in the attic? What type of ventilation is in the attic space besides the fan? (Where does the outside air enter?) When the insulation was blown in where baffles used to maintain an open air space between the roof and the insulation?


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