Dallas Roofing: Article About Attic Ventilation
Attic ventilation is an essential part of preventing heat damage to Dallas roofing, and it can also help reduce cooling costs. Without proper ventilation, the air in the attic can reach temperatures up to 60 degrees higher than those outside. When this occurs, asphalt shingles may be damaged by the heat, which will affect their ability to repel water. The heat in the attic may also transfer through the attic floor and increase the temperature inside the home.
Additionally, stagnant air in the attic is likely to be humid, and with enough moisture in the air, mold may develop, and the insulation's R-value may be reduced. This is why it is important that outside air is able to enter the attic and displace the hot air that collects there.
There are a variety of ways to accomplish this, but the method that is currently in favor involves vented soffits and ridge vents. Vented gables and intake fans are still occasionally used, but it is believed that these methods do not provide the best or most complete ventilation.
Most homes have a roof that hangs over the outside wall. This creates a gap, and the attic is exposed to water, bugs and debris. Soffits, which are commonly made of either vinyl or aluminum, are installed to cover these openings.
The expert roofers at Total Roofing of Dallas can assist you with any questions regarding emergency repairs or roof maintenance.
Some soffits are made with vents, and these vents are usually at an angle, so they keep out detritus and water but still allow air to flow through them. In doing so, vented soffits provide a mechanism to allow air to enter the attic.
Air leaves the attic through ridge vents, which are located at the apex of the roof. They are slanted openings, and they often have a cover over them to ensure that water and debris can't get into the attic space.
Baffles are also an optional, but very valuable, part of ventilation systems. If air is able to flow freely from vented soffits through an attic, moving air is likely to disturb insulation, which can reduce its efficacy because it needs to be closely packed. Air may also blow by HVAC ducts or over the floor of the attic and heat the air in the ducts or the home.
With baffles, which are plywood boards, a pathway can be created for the air, ensuring that it does not disturb insulation and that it stays away from the attic floor and HVAC ducts. Insulation can also be placed around baffles to further ensure that heat transfer does not take place.