These can be ridge vents wind turbines or the flat vents your roofer wants to install.
Installing wind turbine roof vent.
In either scenario the exhaust vent is potentially ingesting air and weather which it s not designed to do.
Good attic ventilation is important for preventing ice dams in the winter.
Of vent for every 300 sq.
In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq.
Ridge vent systems normally run the full length of the roof.
The more exhaust vents on the roof the better it is for the attic right.
Ridge vents cost 2 to 3 per linear foot.
Roof vents come in a variety of styles and range from 10 to 500 each.
The installation of a turbine vent is nearly identical to a static vent.
Exact rates depend on the type size and number of units you choose to install.
Flashing and sealant is used to prevent water from seeping in around the opening.
A roofer will from the attic mark a spot near the ridge of the roof he may first use nails from the attic to mark preferred spots between two rafters.
Roof turbines are usually less expensive to install because they only require the removal of a small section of shingles and an appropriately sized hole to be drill through the roof.
Attic must have 5 sq.