Maintaining Proper Attic Ventilation Keeps Your Roof in Good Shape

The effects of inadequate attic ventilation travel both down and up. It’s well known that a broiling hot attic conducts heat down into your living spaces, making the A/C work overtime to offset it. Most people are aware, too, that excess attic humidity can saturate attic insulation and trigger mold that affects indoor air quality. However, attic ventilation issues also impact what’s overhead: your roof. The right temperature for an attic is as close to the outdoor temperature as possible, with a relative humidity that approximates the living spaces.

Here’s how the roof is affected when attic ventilation doesn’t meet these standards.

  • Sustained high attic temperatures can warp and split plywood roof sheathing. This, in turn, buckles the shingles on the exterior of the roof. Water intrusion occurs at the next rainfall, permanently damaging the roof sheathing, as well as other wooden structural components.
  • High levels of attic humidity accumulating during the day condense when the attic cools overnight. This saturating moisture soaks interior wooden components of the roof and causes warping and buckling.
  • In an under-ventilated attic, heat accumulates at the upper portions, warming the underside of the roof near the peak. Meanwhile, lower areas of the roof remain close to air temperature. When this scenario occurs after snowfall, snow melting quickly off the warmer upper roof refreezes down near the gutters where the roof is cold. Ice dams form and snow melt accumulates on the roof. Because shingling isn’t designed to seal out standing water, severe leakage may result, damaging roof sheathing, attic structure and even causing ceiling leaks in living spaces.

Proper attic ventilation can be achieved by first making sure all existing vents are open and not blocked by obstructions like insulation. Ridge vents may be added at the roof peak to increase passive ventilation. Turbine vents powered by the wind also help ventilate, as long as the wind is blowing. To boost passive ventilation more reliably, a solar-powered attic fan can be added to the roof.

For more on maintaining proper attic ventilation to preserve your roof, contact Apollo Home Heating, Cooling and Plumbing today!

Image via Shutterstock.com

"Ernie & Mike did a superb job on my new furnace and A/C installation. Despite having more than a day’s work to do, they came in and stayed until the job was done. They were organized, efficient, and protected the rest of the house well. Got both furnace and A/C installed the same day. Ernie was courteous, informative, and clearly knew his job better than anyone I’ve encountered before. The units look so good guests now get The Tour of our new system. Apollo is clearly not a fly-by-night company. I would recommend them to anyone in need of a new furnace and/or A/C."
- Jerry A.
"I called Apollo because of a water leak I thought I had in our upstairs shower going into the kitchen. Robbie came and assured me everything was fine & looked at all the other plumbing. He ended up changing a few pipes for our washer & clearing a drain. He was very nice & knowledgeable with all my questions. I ended up signing up for the care plan & was very happy with my service."
- Cassandra B.
"The team at Apollo exceeded my expectations. As a business owner, my attention to the details and commitment to providing excellent service is high. From the sales rep. to the installation team, everyone’s performance was outstanding. For example, the installation team went to great lengths to protect our floors, placing floor runners and across the wood floors and up the stairs. They even were spot washing walls upon their departure. I highly recommend this company."
- Randy B.
"We scheduled an estimate AND a tune-up. We knew something was wrong with our furnace, but hoped we could make it through the rest of the season. Upon telling Bill what our furnace was doing, he warned us immediately what the possible outcome was going to be; a cracked heat exchanger. He watched the flames roll backward, tested carbon monoxide levels, which were so high they meter’s last reading was 5,600 before saying “high”. He immediately shut it down, tagged it, and explained that with levels that high and children in our home he wanted off right away. He continued his inspection and showed us via a camera that not only was it cracked in multiple places, but had holes all over it. He gave us a few options for repairing it; his knowledge as well as genuine concern was beneficial and refreshing. Luckily we also scheduled an estimator, Micah, to come too and we were able to get costs between repairing and replacing (with several options). We decided to replace with a much higher efficiency furnace and one sized properly to our home. Hands down, not only did they both provide us great service and knowledge, but without sounding dramatic, they may have saved our lives. This was our first time calling Apollo, but it won’t be our last."
- Sarah B.
"Apollo is an excellent company. I always receive great service. Alex A. was professional and friendly. He kept me informed during the process of checking my furnace and heat pump to make sure they were working properly. The company makes sure you are notified who is coming and when they are on the way. All my interactions with the company have been wonderful."
- Beverly S.
    Image

    Financing

    Image

    Apollo Care Plan