Attic ventilation is necessary, especially in the summer months. Most homeowners do not realize the importance of attic vents, but the truth is that without vents, you will have high energy bills and your roof will deteriorate faster. An un-ventilated attic will cause the accumulation of moisture in the roof space, leading to such problems as mold and mildew. If you do an investigation, you will find that different roof contractors have different views about roof ventilation. In such a case, you have to dig the right information on your own. Do not depend on hearsay. Here are tips for good attic ventilation:
Do not Mix Different Kinds of Vents:
Some contractors believe that you can mix different kinds of vents in the attic. For example, they say you can add a ridge vent onto the old ventilation system. The problem with this set-up is that different vents when mixed together can cause clashing drafts that interrupt the air flow in and out of the attic. At least, when you are adding a ridge vent, its vent holes or turbines should be covered.
Adding Low Profile Vents:
Yet another misconception is that adding low-profile vents on the 2 sides of the roof apex increase the exhaust. This is not so. If vents are installed adjacent to another, the other side will not boost the exhaust but it will transform into an intake. This action will cause warm air to flow towards the floor of the attic, top of ceiling.