7 COMMON PROBLEMS CAUSED BY POOR ROOF VENTILATION
Proper attic or roof ventilation is an essential part of the roofing system. Adequate roof venting pulls fresh air into the attic and releases heat and moisture. This, in turn, reduces the temperature difference between the air outside and in the attic. When done correctly, proper roof ventilation will reduce the risk of potential problems and extend the roofing system's life.
However, poor roof ventilation can cause various issues that can cause damage and lead to expensive repairs. If you’ve ever been in an attic mid-day on a hot summer afternoon, you are well aware of how unpleasant it can get. If not, suffice to say that temperatures inside can climb to over 150 degrees Fahrenheit and feel like a sauna.
Subpar ventilation on your roof also leads to issues with other exterior systems such as siding, windows, and even gutters. In short, damage to the top layer of your home creates a domino effect if not taken care of promptly.
The most common problems caused by poor roof ventilation are due to two factors, heat and moisture. Every time we run a load of laundry, take a shower or wash dishes, it increases the moisture level in the home and, unless adequately vented, in the attic. Trapped moisture and heat can lead to the following common problems:
1. Mold & Mildew
A humid environment is a perfect place for mold or mildew to form. Mold can ruin stored items in the attic and cause health problems.
Rust can begin to form on metal components like nails or other critical fasteners. Over time it can rust the heads off of nails or cause plumbing or venting straps to fail.
3. Sagging or Spongy Decking
When excessive moisture begins to seep into the roof decking, it can dissolve the adhesives which hold them together and cause it to warp, sag between rafters or feel spongy when walked on. This can become a danger for anyone on the roof.
4. Roofing System Deterioration
Not only can excessive heat and moisture ruin roof decking, but it can also reduce the life of the underlayment and shingles themselves. Cracking shingles or premature loss of granules can be signs of improper roof ventilation.
5. Air Conditioner Replacement & Expenses
As heat builds in the attic, air conditioners must work extra hard to keep the air inside the home cool. This undue stress on the unit can reduce its life and increase energy costs.
Similar to how sitting in a cold car on a winter day will cause frost to form on the windows, the same can occur in a poorly vented attic. As the attic cools and warms with the day, frost formed inside the attic can melt and drip onto the ceiling.
7. Ice Dams
Ice dams can form at the roof's edge, where trapped warm air can melt snow on the roof and freezes near the eaves. As the snow continues to freeze, melt and refreeze, it creates a barrier or dam preventing water from running off the roof.
Once dammed, water and ice can creep back up under the shingles and underlayment resulting in leaks. Proper ventilation and added insulation can help mitigate this melting and freezing process and eliminate ice dams.
Upgrade Your Roofing Ventilation With Trinity Exteriors!
If your roof is suffering damage from poor roofing ventilation, Trinity Exteriors is here to help!
Get a quote online or call us at 952-920-9520 today!