The Need For A Roof Closure Vent

It’s surprising how things can be all around you and you may never know. Take a roof closure vent, for example. You may or may not have one, or know what one is, even. However, this nifty little gadget or system may be protecting you from all sorts of things – like a voided home warranty, or condensation problems where you can’t see them, or birds getting into your attic.

Roofing, whatever it is made of, has to resist external heat, cold, and wet. Temperature extremes are best dealt with by using paint – dark for colder climates and lighter colors for regions with hot summers. Cold is not much of a problem for most materials. However, moisture can pose a threat to all kinds of roofing.

As air from inside the house rises, it carries moisture with it. The warmer the air, the more moisture it can hold. The air gets trapped beneath the cool roofing where the moisture can condense, causing rot, mold, and corrosion. By venting the space underneath the roof, this moist air can be drawn out and replaced by fresh, drier air from outside.

A vent is a device to let air in or out. Air can move into vents lower on the roof – like ‘soffit’ vents under the eaves – and out higher vents along the ridge. This air exchange is activated by wind flowing over the structure, which pulls the air out along with heat and moisture. Venting is a simple process in a ranch-type house but gets more complicated in homes with many gables and additions.

Of course, a simple opening down low and another higher up would work. However, you don’t want a hole in your roof. Rain and snow are one problem. Others include insects (like a homeless swarm of bees), small mammals like squirrels or bats, or birds who the protected space just right for raising a family. Vents should have baffles or screens to keep everything out but air.

Check out the easy-to-install one piece units online if you need to vent an existing structure. They are simply stuck into place using their own adhesive strips. It’s easiest to do this kind of installation at construction, when vents can be installed along the ridge of the house. Vents should be made of durable materials and can be guaranteed to last as long as the roofing itself.

There is some debate on which method works best and even whether you should vent or not. However, roofing manufacturers seem to see the benefit of venting and may not honor their warranty if it is not done. Venting, of course, is most easily performed during construction of the building. Balance is important, too. If too much air goes out and not enough air flows in, air will be drawn from the interior of the home. This, of course, increases heating and cooling costs.

What you want to do is get moisture-laden air out from under the roofing and draw drier air in. You also need to keep the creepy crawlies and the elements out. A good venting system will do both for you and extend the useful life of your roofing.

Read more about How A Roof Closure Vent Works.

Leave a Reply