Getting Ready for Winter (Attic Ventilation)

Posted by in Attic Ventilation, Buying/Maintaining a Home, Winter Concerns | August 24, 2015

THAT time of year is just around the corner.  The time when the temperatures drop and the airborne moisture in the attic condenses on the attic framing and the underside of the roof deck causing moisture staining, frost, excessive moisture variations that lead to warping of the roof deck, and sometimes even mold growth.

What can be done to reduce the risk?

Here are a few ideas as the cooler weather starts to set in:

  1. Clean the dust from the roof, gable, ridge, and overhang vents.
  2. Provide a clear space between the top of the insulation and the underside of the roof deck at the eaves to allow air to migrate through the rafter/truss space.  This is especially critical for cathedral ceilings, but more problematic to accomplish.
  3. Seal ceiling penetrations to prevent free air flow into the attic.  But be sure not to create a fire hazard at electrical fixtures.  Sealing around electrical fixtures, especially lights, may require a professional.
  4. Replace crushed roof or ridge vents.
  5. Cut tree branches and limbs back from the roof to allow air flow around the dwelling and through the vents.
  6. DO NOT cover vents with plastic (or anything!) to keep the cold out.
  7. Lastly, for the more ambitious, improve the attic ventilation.  See our article, There is Mold in My Attic!

If you can think of any other ideas, please submit them to and we will consider including them on the list.