condensation dripping off roofing nails

kimbuffaloJanuary 31, 2010

We have condensation dripping off of the roof nails. The attic floor was recently insulated with blown in cellulose and a broken and very leaky window was replaced. I'm pretty sure this is the 1st winter we've had this problem. Is there an easy fix such as opening the window a crack or running a fan? The roof has several layers including the original cedar shingles and there are no roof vents. I assume no roofer would attempt to install vents until we do a complete tear off.

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mainegrower

You do need to ventilate the attic. Opening the window will probably suffice for the rest of the winter (and beyond), especially if there are two windows that can provide cross ventilation. Most large hardware stores should have those horizontally adjustable inserts that fit under the lower window sash. The ones I'm thinking of have louvres and screens and are only about 6 to 8" tall. They're specifically designed to provide ventilation. You made need something more than this, like a fan, for the summer to keep the shingles from overheating.

    Bookmark   February 1, 2010 at 5:55AM
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macv

Venting the attic will help but in the winter the attic air should be dry unless there is excessive moisture entering from roof leaks or rooms below. Check for leaks and make sure the exhaust fans are working and being used in the bathrooms.

    Bookmark   February 2, 2010 at 4:04PM
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worthy

make sure the exhaust fans are working and being used in the bathrooms. and not venting into the attic. Basic, you'd think.
You'd think wrong.


Photo: www.checkthishouse.com

    Bookmark   February 2, 2010 at 8:12PM
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kimbuffalo

Unfortunately, we do not have any exhaust fans in the bathrooms or kitchens. It is a 2 family house that needs ALOT of updating! The apartments are upper and lower, we live in the 1st floor and tenants live in the second floor. Should exhaust fans be our next project?

    Bookmark   February 10, 2010 at 1:22AM
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