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Why Proper Roof Ventilation Is Important

Proper roof ventilation is important, but many home owners do not know why. That’s what this page is about – explaining the benefits of a well-ventilated roof and the drawbacks of a not so well-ventilated roof. Our hope is to arm you with the facts needed to make a confident decision in regards to your roofing needs. We will look at all the conditions in which roof ventilation plays a key role and the problems that often arise in roofing systems that either feature no ventilation or poor ventilation.

The Life Of Your Roof

Simply put, a properly ventilated roof will last longer. The reason varies from one climate to the next, but whether the ventilation is considered for either extremely cold or considerably hot/humid climates, the level of importance remains the same. In frigid conditions, roof ventilation helps prevent undesirable events such as an ice dam – a situation that occurs from ice on the roof melting and refreezing at the edges of the roof, which can freeze underneath shingles. The ventilation helps to release any heat that may otherwise build up underneath the roof and cause any snow on the roof to prematurely thaw. In warmer climates, good roof ventilation conserves the energy needed for air conditioning – It serves as a way for the high temperature air that builds up in unconditioned attics to be released. This in turn decreases the load put on any climate controls systems in the house and also increases the life of air conditioning units. Of course, many regions experience varying degrees of both extremes, hot and cold, so ventilation serves a dual purpose that is favorable in any condition.


In addition to increasing energy efficiency and preventing the climate related problems described above, sound roof ventilation also protects every aspect of the roof structure by releasing any moisture that might otherwise collect in the absence of proper ventilation. Moisture that cannot be expelled from underneath the roof deck can cause all manner of undesirable situations. Any metal materials will over time suffer from excess moisture – rusted nails can weaken or even break. Furthermore, various kinds of mold or fungi can develop, and the roof deck itself can deteriorate from dry rot if a roof is not properly ventilated. Basically, roof ventilation offers more than its fair share of benefits of which home owners should be aware. A good roofing system is much more than well-laid shingles, so the protection of every aspect of the system is of considerable value to the prospective buyer.

Complete Ventilation

Some ventilation methods are superior to others. The reason for this is that poor ventilation is really limited ventilation. It is common sense that areas of the roofing structure that are less ventilated will be more subject to the conditions and situations mentioned above than areas with more ventilation – the best results come from a roofing structure that is ventilated at all key points and therefore eliminates the inconsistencies exhibited by systems that are designed to only partially ventilate the structure.

So these are the basic benefits of having a well-ventilated roof and the drawbacks of roofs with little to no ventilation. With the job done right, we can note a number of advantages that home owners can sleep more soundly knowing. A well-informed home owner – in the long run – makes for a happier home owner when it comes to the proper ventilation of their roof.
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