Gap Vent Roof

Vents evenly spaced underneath the roof provide intake.

Gap vent roof.

When installed as part of a properly balanced when installed as part of a properly balanced attic ventilation system gaf cobra rigid vent 3 is a rigid style shingle over exhaust vent installed at the roof ridge that helps exhaust excess heat and moisture from your attic while resisting wind driven rain infiltration. The first step is to check out this 60 second video and learn about the 300 1 rule the difference between intake and exhaust ventilation and why proper ventilation is so important to get right to help calculate your attic ventilation needs visit gaf ventilation calculator. How do you pick the right attic vent. The ridge of the roof is prepared similarly for both types of ridge vent.

For best performance the airspace in the vent chute should be a minimum of 2 in. It features a unique easytear sizing feature that helps eliminate. Multiply it by 18 square inches the net free air per foot of ridge. To calculate an example of exhaust and intake use 25 feet of roof ridge vent.

If you choose to vent the roof deck then be serious about it and really vent it. Unless you re bulk filling rafter. One static vent style is the turbine vent which uses wind to power its enclosed fan all it takes is a light breeze to rotate the blades and suck heat out of the attic view example on the home. Of airspace between the top of the insulation and the back of the roof sheathing.

Since exhaust and intake must be equal 450 square inches of total intake is required as well. The code calls for a minimum of 1 in. This gives you 450 square inches of total exhaust. Tools you will need for roofing from amazon bostitch coil nailer https amzn to 2u1v8e2 shingle remover https amzn to 2fzu5wf roof snake https amzn to 2.

An aluminum ridge vent has a mushroom shaped profile combined with a wide flange on both sides that sits on top of the roof shingles. The gap size typically between 1 and 3 inches depends upon the style of ridge vent chosen. Residential and commercial roofing shingles slate roof ventilation roof underlayments asphaltic and tpo roof membranes.