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Roof top ventilation, which is technically attic ventilation, is a highly important element of roofing. Proper ventilation will increase the longevity of your roof.
Poor ventilation will vastly shorten the life of the materials. We see this scenario daily, roof systems failing far short of the material life expectancy. Had a very small investment been made when the roof was installed, adding proper ventilation, the roof would have lasted much longer.
Proper attic ventilation will extend the life of a roof along with reducing problems as it helps balance, or minimize the temperature differential between the air in the attic and the air outside. Simply stated; Proper ventilation will remove moisture and heat from the attic.
Details of problems from poor ventilation
Trapped moisture and heat can raise energy costs by putting a load on your AC. It can also cause damage to the roof system and structural components. Not to mention, personal items stored inside the attic where temperatures can easily reach 150° F (65° C).
Trapped moisture (more of a concern in humid regions) causes condensation. Condensation that forms inside an attic can come from use of tubs, showers, washing machines, clothes dryers dish washers, etc. In extreme cases condensation can be bad enough to be mistaken for a leaking roof.
Vent Types
There are many different types of roof vents on the market today. Following is a brief example and explanation on different type vents.
. Turbine Vent
Also called a Rotary Vent, has a free spinning top allowing air to exhaust. While this vent is effected by wind, it is not necessary for the wind to blow for ventilation to occur. This is a very good, high profile vent.
Low Profile
Also referred to by too many names to list on this page. Low profile vents are typically inexpensive and come in a variety of materials construction, copper, steel, plastic, etc.
Roof /Attic ventilation
