Proper Roof Ventilation
Proper ventilation will result in drier attics in the winter, cooler attics in the summer, and help reduce energy consumption. Without proper roof ventilation, common household activities can wreak havoc on a roof or attic:
- In Hot weather heat can transfer back down into living areas – reducing energy efficiency
- In cold weather, warm air generated by laundry, showers, cooking, or dishwasher can linger in the house and cause moisture build-up.
In fact, ventilation deficiencies are the most common flaw that may void manufacturer warranties. Ultimately, proper ventilation – along with attic proper attic insulation – helps maintain a comfortable temperature inside a home, increase energy efficiency, prevent moisture damage, and contribute to the longevity of a roof.
Types of Roof Vents:
There are many types of roof vents or attic vents available today. There are ridge vents, power vents, static vents, turbine vents, soffit/cornice vents, gable vents, and cupola vents. Some will ventilate better than others depending on the roof configuration, attic size, etc.
For roofs vents to work well their must be a source of replenishment air. Intake Vents provide a source of fresh air and are usually located in the eaves or soffits. Exhaust Vents allow fresh air to leave the attic, and are located on or near the ridge line of the roof.
Common Roofing Ventilation Mistakes:
- Attic insulation is blocking the intake vents
- Bathroom vents are exhausting into the attic
- Insufficient air flow or too few vents
- Mixed exhaust ventilation used on the same roof
In most cases, exhaust ventilation should never be mixed on the same roof. For example, if a ridge vent is used, power ventilation should not be used.
When a power fan or even static ventilation is placed on the same roof as a ridge vent, the ridge vent becomes intake ventilation. As a result, instead of the soffits acting as intake, the power vent draws the air from the ridge vent. This results in moisture retention and is a major contributor to roof failure and attic mold growth. For other factors effecting ventilation systems.
Our project managers can recommend the right ventilation for your project. From traditional box vents to shingle-over ridge vents, Moss can install the best choice for your job
When quality and service matter – talk to Moss!