Proper Roof Ventilation is a Must!

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  • Author C. Michael Hunter
  • Published November 23, 2011
  • Word count 570

One of the most critical decisions to be made in a roofing project is choosing the proper ventilation system. Its importance simply cannot be stressed enough due to its impact on both the building and its occupants. Accordingly, many things may occur if the roof does not have a good means of air circulation.

Condensation, which is a naturally occurring phenomenon, could form that leads to moisture accumulation and cause damage to roofing components which could subsequently result in premature roof failure. An inadequate circulation system will also affect the overall health of the residents. Therefore, it is necessary to know and understand how these systems work, their importance, and the benefits provided in maintaining a safe and comfortable home.


Ventilation is a technical term used to describe the movement of air inside a closed space. It is believed that the efficient exchange and circulation of attic air requires specific movement to deliver its full potential. There needs to be a constant flow of air to remove stagnant moisture or trapped air that has been sitting in an attic. These systems promote circulation and create a balance in airflow from inside the home to the outside, avoiding the build-up of condensation. In addition, when the attic has a good flow of moist air, the home can breathe and avoid damage caused by mildew and mold.


Many people would agree that the importance of attic ventilation is to improve energy efficiency during every season; however, there are other ways to improve energy efficiency other than this, such as insulation and roofing material that are designed to maximize energy performance. The application of an attic vent to thwart moisture build-up provides the greatest advantage to houses located in colder climates.

Where there is intense cold weather, it will be more beneficial to have these circulation systems to avert the formation of condensation on sheathing material and avoid dampness on other major components. It will help put a stop to any serious problems from developing in both the summer and winter. An inadequate system can result in increased moisture and cause damage to the roof decking. Proper ventilation promotes energy efficiency and hinders the development of condensation and moisture accumulation while extending the life of the roof.


It is important to understand that ventilation is crucial in preventing moisture development in the attic during the cold season and reducing the effect of heat radiation during the summer. An excessive amount of moisture could lead to roof damage caused by dampness and mold or mildew formation. It could also: affect the health of family members; increase utility costs; and cause the need for unwanted repairs.

The benefits of a proper ventilation system could prevent all of these problems. Proper air circulation provides a comfortable living environment, decreases energy costs, ensures the welfare of household members, and could even decrease or eliminate the need for expensive repairs and maintenance.

The importance, function, and benefits of a good ventilation system should not be overlooked since they are engineered to eradicate moisture build-up by managing attic air circulation. While a good air circulation system is essential to help reduce utility bills and ensure that a home stays in good condition, it also helps to keep a home safe by avoiding structural damage or premature failure of the roofing structure. Therefore, to maintain efficiency in an overall building structure, adequate roofing ventilation is a must!

C. Michael Hunter is an expert in residential and commercial roofing. To find out more about Roof Houston TX, go to the main website at:

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