Roof Ventilation is the removal of excess heat and moisture from your attic and roof space to provide a healthier living environment in your home. Moisture that accumulates in your attic is a common problem and can lead to mold, mildew and damage to roofing shingles and roofing trusses, which can shorten the lifespan of your roof. Moisture that is not vented properly can also cause ice dams in the winter, which can leak into your home and potentially damage the structure of your house. In addition, excessive heat and humidity can damage your ceilings and walls and promote the growth of moss on the roof.
There are two primary types of roof ventilation; natural and mechanical. Natural ventilation relies on wind and the stack effect to continuously transform heated air into a cooler layer of drier air. Intake vents like soffit vents, and exhaust vents such as ridge or attic fans work together to circulate the attic.
Proper attic ventilation is a requirement for most roofing manufacturers’ warranties, and should be installed in conjunction with soffit to ridge venting. The goal of the venting system is to provide sufficient attic ventilation to prevent problems with sagging, wood rot and mold in your attic.
Moisture that is not ventilated properly can collect in your attic and can leak into the interior of your home, causing problems with mold, mildew, rusty nail heads and damp or compressed insulation. Moisture can also shorten the life of your shingles and damage roof trusses, attic framing and attic insulation, leading to structural damage, water leaks and potential health hazards in your home.
Inadequate attic ventilation can overtax your air conditioner, causing it to work harder to cool your home in the summer. Inefficient venting can also increase your energy bills and waste large amounts of money in the long run. Proper attic ventilation can help to regulate the temperature in your home and make your air conditioning more efficient, saving you energy and money.
There are a variety of different styles and sizes of roof vents available, including ridge vents, gable end vents, louvered vents, turbine vents, power vents and off-ridge vents. The best type of vent for your home depends on your attic floor space, roof style and ventilation needs. To ensure your roof is well ventilated, it is important to follow the 1:300 rule when installing vents in your attic. A helpful attic ventilation calculator is available on our website to help you determine how many vents and where they should be located.
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