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Why is attic ventilation so important?

Proper attic ventilation systems allow a continual flow of outside air through the attic, protecting the efficiency of the insulation and helping to lower temperatures in the living space.

It consists of a balance between air intake (at your eaves or soffits) and air exhaust (at or near your roof ridge).

The U.S. FHA (Federal Housing Administration) recommends a minimum of at least 1 square foot of attic ventilation (both intake and exhaust) for every 300 square feet of attic space. For example, if your attic is 900 square feet, you need a total of 3 square feet of ventilation. This amount should be divided equally between intake and exhaust ventilation (i.e., 1 1/2 feet of each) to insure proper air flow through the attic.

Many homes in North America do not have proper attic ventilation. Why? Because most people are unaware that attic ventilation can impact the longevity of their entire home!

In the summer, improper ventilation can cause attic heat to build in excess of 160°F. This super-heated air eventually penetrates the ceiling insulation into the living area below.

 Finally, attics should be properly ventilated to help prevent ice dams in  cold northern climates. During the winter, ice and snow on a roof will  melt and run down the deck to the cooler eaves. This run-off can re-  freeze, creating an ice dam that may force water back up under the  shingles and leak into your home — causing hundreds or thousands of  dollars of damage to your ceilings and walls. Adequate attic ventilation  reduces the amount of initial melting that occurs on your roof, thereby  reducing the chance that ice dams will form.

For more information regarding the Renaissance approach to ventilation issues please visit our ventilation page.

You may also visit GAF’s ventilation product page

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“This is a great company - all the employees are professional and get the job done in a timely manner. They are also very responsive, which is hard to find these days. Any time you need roof work - you should call Renaissance Roofing!” Cindy Szymanski 5 Star Rating
“Renaissance Roofing recently completed a new roof installation at our home in Plymouth. They did a thorough and professional job. Their owner, Don and his assistant Jack, both followed up extensively while work was under way and were able to resolve any minor issues that arose to our complete satisfaction. They were also very thorough when it came to clean-up. I would highly recommend them to anyone looking for new roofing or roof repairs.” Clark Lefurgy, Plymouth, MI 5 Star Rating
“After storm damage to my roof, I decided to replace the entire roof. Don came out and inspected the situation and gave me an estimate for a replacement. His was the third estimate I’d received and Renaissance seemed to be the one I was most comfortable with. Don is very straightforward in his presentation. The work was done very professionally and I was pleased with how detail oriented the crew was. The cleanup was thorough and the new roof looks great. I would strongly recommend Renaissance” William Carney 5 Star Rating
Renaissance roof was A company that was above and beyond professional, knowledgeable, and proactive on protecting my property by offering to tarp my roof. From start to finish this company knew the product, knew how to best solve some current roof problems, and earned my business. I would highly recommend them to anyone seeking out a new roof. - M Fassett 5 Star Rating
I have to admit, when I called Renaissance Roofing, for a moment I was hesitant to schedule an appointment because of the $98 inspection fee (it is waved if you hire Renaissance Roofing to do the work). Making that appointment turned out to be the best decision- Don was punctual, knowledgeable, honest and straightforward with me. I know who I am going to call if I have another roof problem! - VC Clarke 5 Star Rating
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