Ventilation is a vital part of your roofing system. Without proper ventilation, warm air can “pool” in your attic. This not only wreaks havoc on your heating and cooling bills, but in the colder months the warm air from your house reacts to the cold air outside, which can result in condensation. Additionally, it can cause blistering or peeling paint, water stains on your ceilings, buckling roof shingles, and ice dams!

There are two main types of vents that are used on your roof to provide ventilation—ridge vents and box vents. Both types of vent are non-mechanical, and so there is no need to worry about system or electrical failures.

Ridge Vent
A ridge vent is installed all along the peak of your roof. It works like a vacuum, allowing continuous air flow through every rafter, which allows the warm air and moisture to escape from the attic.

Ridge vents have a seamless look, and blend in with the rest of the roof. They are much less likely to leak than box vents, and are much more efficient. They offer complete and consistent venting.

The down side? Ridge vents are more labor intensive to install.

Ridge vents are best for roofs with an appropriate peak.

Box Vent
Box vents are installed over holes cut in the roof. They use winds and convection to allow the warm air and moisture to escape from the attic. Most often, there will be several box vents on a roof, depending on the square footage.

The down sides? Spaces between the rafters where the box vents sit can store air, which often can’t be forced out. Additionally, since they are covering a hole, they are more prone to leak, and allow space for small animals to enter your attic.

For box vents to work properly, you must have good soffit ventilation and an open attic. Box vents are most often used on homes with small roof ridges which do not allow for ridge vents, or uniquely designed roofs.

Vents are part of the entire roofing system. If you are thinking about replacing your roof, make sure you talk to an expert about what ventilation system works best for you. Allstate Roofing & More, LLC provides free estimates and consultations to residential customers year-round. Contact us today to discuss your roof and ventilation system, 585-400-7663 or