A ridge vent is exactly that, a roof vent at the ridge, and a loose ridge vent can become a long leak.
Not long in terms of time. Long in terms of length!
The most efficient, and really the best in my opinion, is the soffit and ridge vent system.
Air comes in through the soffit vents, and finds its way out via convection and high pressure seeking low pressure.
It is pure physics.
It never fails.
The ridge vent is a cap, however, covering a long slit out of the top of the roof.
The slit is typically 3" or 4" wide, and nearly the entire length of the roof.
A ridge vent is typically installed with roofing nails.
If they are not long enough, or if they come loose over time due to winds and temperature changes, the ridge vent can come loose.
Often the ends will bend upward, but the entirety of the material can also come loose.
When that happens a LONG leak happens!
Ridge vent leaks are usually smaller, and happen over time.
As such, the damage is insidious, slower, and the wood becomes more and more saturated.
That leads to rot and decay.
A ridge vent can be seen from the street. If you need a closer look, get a good pair of binoculars and have at it. Looseness is a problem that will only get worse, and is an easy fix for any roofer or handyman who wants to go up there.
My recommendation: a ridge vent is an important feature on any roof. It helps maintain the health of the roof sheathing and attic space environment. Good attic ventilation contributes greatly to the longevity of the roof and the comfort of the indoor environment during the summer. In the winter the ridge vent helps to carry off moisture, necessarily created by temperatures and day-to-day living. Removing moisture is as essential as removing heat.
Jay Markanich Real Estate Inspections, LLC
Based in Bristow, serving all of Northern Virginia.
Office (703) 330-6388 Cell (703) 585-7560