Plano Roofing: Article About Benefits Of Attic Ventilation
Homeowners in warmer climates will frequently spend a lot of time and effort on ensuring that heat is not able to enter their house by eliminating leaks in their home. As a result, the thought of making sure that outside air gets into an attic may seem like a bad idea. However, the reality is that airflow through an attic is essential to keeping Plano roofing in good condition, and can help make it easier to cool a home.
Two of the main reasons that attic ventilation is essential are that stagnant air is often very humid, and lack of air flow can lead to incredibly high attic temperatures. When air is humid enough, the levels of moisture in an attic can result in water damage to insulation and wooden structural components.
When insulation is damp, the moisture can make it less effective and lower the R value of the insulating material. This means that more heat can enter a home, which results in an AC that has to work harder to make up for the added heat.
Airflow allows extremely hot and moist air to move out of an attic and be replaced by cooler and dryer outside air. The temperature in an attic without airflow can be up to 60 degrees higher than outside.
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High enough temperatures may warp asphalt shingles, reducing their ability to repel water and making them more likely to be torn off in high winds.
Roofers now commonly use a combination of vented soffits and ridge vents to create needed air flow in an attic. Soffits go between a home's outside walls and where the roof hangs over them. This protects an attic from water and debris. Vented soffits have slits in them that allow air to move through, but nothing else.
Air flowing through vented soffits is normally channeled through baffles, which are boards that are normally made of plywood. Using baffles to create paths for air ensures that moving air cannot disturb insulation and keeps it away from HVAC ducts. This also allows roofers to install ventilation around areas of air flow.
Baffles will usually lead air up to the top of an attic, where most of the hottest air will have collected. Ridge vents provide openings at the apex of the roof, and these openings are covered so that water cannot leak into the roof. Some homes have vented gables instead of ridge vents to allow air to flow out.