When it comes to investing in your homes health and energy conservation, roof ventilation is by far the cheapest method to pull hot air out of your attic in the summer and remove moisture year around. There are various types of vents you can install depending on the type of roof you have.

For example, on a gable roof, you might want louvered gable vents, and on a hip roof you could choose ridge vents. If you have a flat roof, you would opt for a box, power, or wind turbine vent.

The main venting systems are:

roof, metal roof, tin roof

Image from Pixabay via sam_higgins_rulz

  • Ridge Vents & Off Ridge Vents
  • Box Vents
  • Power Vents
  • Wind Turbine Vents
  • Soffit Vents
  • Cupola Vents
  •  Louvered Gable Vents


The other factor that decides the type of roof ventilation is the size of your home. The common formula is for every 300 square foot of attic space you need 1 foot of roofing ventilation. This measurement is essentially the floor space in your home.

Best case scenario, you want to split the ventilation space between soffit vents and roof vents to provide maximum air flow.  The following post explains why the correct amount of attic ventilation is critical for your home’s health:

5 Myths about Attic Ventilation


Just like properly sizing your furnace and air conditioning unit, you want precisely the right amount of attic ventilation for your home. Insufficient ventilation can lead to moisture problems during the winter and decreased energy efficiency during the summer but too much ventilation can be just as bad, if not worse. Roof vents create an additional roof penetration, essentially another place of vulnerability where leaks can occur. Some vents are necessary, but you don’t want to needlessly increase the number of roof penetrations. More than leaks, these seams can cause blowouts during a hurricane or allow sparks from a wildfire to enter your home and set it ablaze.

Read more here:  5 Myths about Attic Ventilation

This video goes through the process of installing a box vent on an existing roof. I really like the creator of the video because he gives really practical advice for do-it-yourself types who want to tackle their own projects. However, getting up on a roof and working isn’t for everyone, and safety is a huge factor, so be sure that you take all the necessary precautions for roof safety.

Watch how to install a box vent and replace the shingles properly so you avoid any leaks:

Many people prefer ridge vents, as they are lower in profile and you only install one long vent along the peak of the roof. A ridge vent is more expensive than box vents but since both are non-mechanical, they do rely on also having soffit vents to create the correct flow of air.

The next post goes over the reasons that ridge vents are popular for a hip roof:

GAF | Cobra Hip Vent

Ridge Vent*Provide a safe and effective attic ventilation solution for roofs with little or no ridge

*Remove excess heat and moisture to protect your roof from premature deterioration

* Look virtually invisible when installed on your roof

*Protect against weather infiltration that can damage your attic and possessions

*Avoid rot and limit the growth of harmful mold

*Guard against ice damming in harsh winter climates

*Possibly reduce excessive utility costs

Read the original post here:  GAF | Cobra Hip Vent

Powered roof vents are a great option, as you don’t have to rely on the wind and what direction it is blowing for your vent to flow properly. With box, ridge, gable and soffit vents, if the wind isn’t blowing, you don’t get much air movement.