My favorite is the Shingle Vent II from Air Vent Corporation @ www.AirVent.com
As a similar comparible product, the Cobra Snow Country has a knock off quality very much like the Shingle Vent II.
I do not like ANY of the roll vent style products for various reasons.
Less NFVA on occasion.
Distortion due to nailing strength at different spots.
No external wind deflecting baffle.
Have had 4 instances in the early 90's with Roll Vent by Benjamyn Opydyke and Cobra Roll Vent, 2 with snow leaks and 2 with wind driven rain leaks.
Since 1991-1993, when I switched to exclusively using only the Shingle Vent II, there has not been one single complaint or concern.
They come in 4 foot length sections and are more ridgid than the roll vent style products, but do have a thicker visual appearance.
They do work very well though.
What have you considered for your Balanced amount of Intake Ventilation?
Ed
As a similar comparible product, the Cobra Snow Country has a knock off quality very much like the Shingle Vent II.
I do not like ANY of the roll vent style products for various reasons.
Less NFVA on occasion.
Distortion due to nailing strength at different spots.
No external wind deflecting baffle.
Have had 4 instances in the early 90's with Roll Vent by Benjamyn Opydyke and Cobra Roll Vent, 2 with snow leaks and 2 with wind driven rain leaks.
Since 1991-1993, when I switched to exclusively using only the Shingle Vent II, there has not been one single complaint or concern.
They come in 4 foot length sections and are more ridgid than the roll vent style products, but do have a thicker visual appearance.
They do work very well though.
What have you considered for your Balanced amount of Intake Ventilation?
Ed
