One of the most critical factors in roof system durability is proper ventilation. Without it, heat and moisture build up in an attic and combine to cause rafters and sheathing to rot, shingles to buckle, and insulation to lose its effectiveness.

Therefore, it is important never to block sources of roof ventilation, such as louvers, ridge vents or soffit vents, even in winter. Proper attic ventilation will help prevent structural damage caused by moisture, increase roofing material life, reduce energy consumption and enhance the comfort level of the rooms below the attic.

In addition to the free flow of air, insulation plays a key role in proper attic ventilation. An ideal attic has:

1. A gap-free layer of insulation on the attic floor to protect the house below from heat gain or loss.
2. A vapor retarder under the insulation and next to the ceiling to stop moisture from rising into the attic.
3. Enough open, vented spaces to allow air to pass in and out freely.
4. A minimum of 1 inch between the insulation and roof sheating.

The general ventilation formula is based on the length and width of the attic. We recommend a minimum of 1 square foot of free vent area for each 150 square feet of attic floor - with vents placed proportionately at the eaves (e.g., soffits) and at or near the ridge.

We Recommend

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Homeowner's Best Choice: Vents Your Attic... Allows heat and condensation to escape at the most effective location - the ridge. Looks Terrific... Shingle-over design blends into your ridge line. Watertight... Passes the 110 mph wind-driven rain test. Insect Guard... Specially-designed louver spacing helps keep insects out. Energy Efficient... May even reduce your utility bills! Durable... Designed with high-impact polymers.

Lucius Roofing - a Drug-Free Workplace - Licensed - Fully Insured - Bonded.