How Roof Ventilation Works
A balanced ventilation system moves air from the eaves (intake) to the ridge (exhaust), keeping your roof deck cool and dry:
Problems Caused by Poor Ventilation
Insufficient ventilation causes multiple issues that shorten roof life:
Types of Roof Ventilation
Several ventilation options are available, each with pros and cons:
Balancing Intake and Exhaust
Proper ventilation requires balanced intake and exhaust:
Ventilation Maintenance
Keep your ventilation system working properly:
Frequently Asked Questions
Why is roof ventilation important?
Proper ventilation prevents ice dams, extends roof life, reduces energy costs, and prevents moisture damage. In Colorado, ventilation is especially important due to the large temperature swings between attic and outside temperatures.
How much ventilation does my roof need?
Generally, you need 1 square foot of ventilation for every 150 square feet of attic floor space. This should be split evenly between intake (soffit) and exhaust (ridge) ventilation. Buildings with vapor barriers may need less.
Can I add ventilation to an existing roof?
Yes, most existing roofs can be upgraded with better ventilation. Ridge vents can replace existing exhaust vents, and soffit vents can be added under the eaves. Consult a roofing professional to determine the best upgrade for your roof.
How does ventilation affect energy bills?
Proper ventilation can reduce cooling costs by 10-20% in Colorado summers by keeping the roof deck and attic cooler. In winter, it prevents heat buildup that can cause ice dams and waste energy.