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Roof Ventilation Systems

Ventilation is simply the process of supplying a continuous supply of air through the attic space. Proper ventilation consists of 50% intake under the eaves, and 50% exhaust near or at the roof peak – at least three feet higher than the intake system.

Why Ventilate?

To fight the enemies of heat and moisture, you must ventilate year round.

Heat in unventilated attics may cause temperatures to exceed 150 degrees causing damage to shingles, roof sheathing and possibly radiating to the living area. Moisture being the #1enemy, causes rot, mildrew, mold, paint blisters, and renders insulation to be ineffective.

Proper Ventilation:

Roof Ventilation Systems

  • Reduces energy bills
  • Reduces ice build up
  • Eliminates mold/mildew which can lead to major health problems

Roof Louvers & Gable Vents

Roof Ventilation Systems - Roof Louvers

A properly balanced system consists of 50% intake and 50% exhaust.

Installation of gable vents are a great alternative and an addition to your home’s ventilation system. Gable vents typically reside near the peak of your roof, on the gable ends of the house. Gable vents are used as the sole means for keeping the air moving in your attic.

Gable Vents InstallationVentilation SystemsRoof Ventilation



Without ventilation, heat from the roof space radiates into the home and can also limit the effectiveness of insulation.

Roof Ventilation Systems - Turbine-Whirlybird


Without ventilation, moisture laden air rises and condenses in the roof space. Dampness is trapped.

Roof Ventilation Systems - Winter Setup

The Way They Work:

When there is a breeze blowing in the air, the turbine turns and creates a suction that can remove as much as 300 cubic feet of air, perminute. Their popularity is also due to the fact that they do not require any energy to operate.

Ridge Line Vents:

  • Works year-round
  • Provides evenly distributed ventilation along the entire underside of the roof
  • 18 square inches of net free area per linear foot(depending on type and model)
  • Slim design, visual appeal
  • Provides a higher volume of airflow per square foot of attic area than any other fixed-vent system
  • Design maximizes airflow across the entire underside of roof sheathing
  • Changes in wind direction have no significant effect on vent performance

Roof Ventilation Systems - Ridge Line Vents

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