If you're like most folks, you've probably never given any consideration to how well ventilated your attic is. But proper attic ventilation is very important to your home's good health, both in summer and winter. In the summer, a good flow of ventilation will remove unwanted heat that is trapped in the attic. That heat can damage the roofing, and it also makes it that much more difficult to keep your home cool. In the winter, removing attic heat allows the underside of your roof to stay closer to the ambient temperature of the outside air, which helps prevent ice damming. And throughout the year, good attic ventilation removes excess moisture before it can accumulate and create the potential for mold growth or damage to wooden structural members. Properly installed, attic ventilation works on the natural passive movement of air. For the typical attic, this means a combination of low vents along the eaves of the roof, and high vents along roof's ridge. Since the air in the attic is war...
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