Attic Ventilation - Systems & Standards

If you have a question you would like to add to this page, click here. Replaced Roof Question Submitted by Peter Denson: August 20, 2007 Our old roof was recently replaced. New roof vents were installed, but we still see signs of poor attic ventilation. Did the roofing company who replaced our roof make a mistake? Replaced Roof Answer Having a new roof installed to your home does not guarantee adequate attic ventilation, even when new roof vents are installed. Why? In an attempt to be price-competitive, many roofing companies choose to keep their business process simple by not introducing their customers to the true importance of proper attic ventilation. In addition, many roofing companies view attic ventilation as too complex and bothersome to integrate into their services. back to top New House Question Submitted by Jen Devirgilio: August 25, 2007 My house is only 5 years old. Why do I need an attic inspection? New House Answer Newer model houses often need extra attic ventilation due to extreme air-tightness of their construction. Consequently, this air-tight construction causes insufficient free flowing air. A healthy home must be able to "breathe". This is only attainable by employing sufficient intake/exhaust air flow, without compromising heat energy or A/C energy. As experts in the field, AVS will evaluate all the necessary requirements to help you successfully ensure these conditions. back to top Laundry Room Question Submitted by Gobi Krishna: August 26, 2007 I discovered that the dryer in my laundry room was ventilating into the attic. After having the dryer's exhaust re-directed through the wall to be expelled outside the house, the attic is still very damp and smelly. Why is this happening? Laundry Room Answer The constant wet-air-flow from the dryer made a long-term negative impact on the attic's moisture level. It could take a few weeks or months for the smell to subside. Be sure that the attic ventilation is up to par and check other venting systems (kitchen, bathroom) so the attic is not trying to handle another overload of moist air. back to top
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Trapped attic heat and moisture can play havoc on the roof of your house. Excessive heat literally bakes the roof deck and causes the shingles to crack and curl prematurely. A 25-year shingle will begin to fail after only 8 years. Trapped moisture in the attic causes condensation that leads to insulation failure and structural damage to the roof's framework.

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