Attic Ventilation Service
Proper Attic Ventilation
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 aminimum 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.
- Premature aging of your roofing system ("fried" shingles)
- Warping, cracking, or breaking down of wood framing
- Damage to siding, exterior or interior paint, and wallpaper
- Roof deck warping and rotting of the wood frame
- Mildew growth
- Buckling of shingles and felt
How to determine whether you need better attic ventilation
In the summer, good attic ventilation reduces heat buildup. That cuts cooling costs and prolongs shingle life. In the winter, warm, moist air seeps into the attic from the living space below. Good ventilation allows the heat and moisture to escape. That keeps your attic dry and reduces ice dams. Here are four signs of an unventilated or under ventilated attic:
- Look at your eaves and roof. If you don’t see any vents on the roof or in the eaves, you need to add some. Your roof vents may not look anything like the ones shown in this article. Your roof may have a ridge vent, which is a low profile, continuous vent running along the peak of the roof. Or it may have gable vents, which are louvered openings at the top of gables.
- Touch your ceiling on a warm, sunny day. A hot ceiling tells you that the attic is acting like a solar oven, raising your cooling bills and cooking the shingles.
- Thick ridges of ice on your eaves in winter are a sign of poor attic ventilation. Warm air that escapes rooms below gets trapped in the attic. Snow melts and the water refreezes on the cold eaves, creatingice dams.
- Warm air that escapes living space also carries moisture that will condense on rafters or roof sheathing. Grab a flashlight and inspect your attic during the winter. If you see dampness or frost, you need better ventilation.
ICE PREVENTION SERVICES
ICE DAM REMOVAL AND ROOF & GUTTER ICE
Proper Attic Ventilation
During the winter Ice Dams can be a big problem. We are experts at removing snow and ice from your roof and can suggest cost-effective solutions such as electric roof deicing cables (heat coils or heat tape), ice panels, or gutter covers to help to prevent ice build up in critical areas.