Charlotte Roofing: Article About Attic Ventilation
Much of keeping heating and cooling costs under control is based on ensuring that there are not gaps in a home or HVAC ducts that allow outside air to get in. When cold air enters a home in the winter, the heater has to work longer to keep a home comfortable. However, while preventing outside airflow is important in the main part of a home, it is actually the opposite when it comes to the attic because roofing needs to be ventilated, as Charlotte roofing professionals will attest.
Attic ventilation is normally achieved with a combination of vented soffits, ridge vents and baffles. Intake fans and vented gables are also sometimes used, but in the last few years, they have become considered less effective than soffits and ridge vents.
Vented soffits allow air to flow into the attic, and ridge vents allow air to escape the attic. Baffles are frequently made of plywood boards, and they are used to create a path for the outside air to flow through. This helps to ensure that vents are not blocked, and it also prevents airflow from disturbing insulation. Insulation will lose its ability to prevent heat transfer if it is not packed.
The professional roofers from Southern Home Services of Charlotte NC would be happy to answer questions about fiber cement siding or windows.
With baffles surrounding air coming into the attic, the areas where air flows through can be completely insulated. This ensures that if HVAC ducts are in the attic, cold or hot air does not flow past them. It also prevents heat transfer through the floor of the attic, helping to reduce the work HVAC systems have to do.
The reason that ventilation is important in attics is because it can help maintain the temperature of the attic in the summer, and it can help stop ice dams from forming in the winter. In the summer, hot and humid air will get moister and hotter if it is not allowed to escape, in some cases reaching temperatures dozens of degrees hotter than the outside temperature.
In the winter, attic ventilation helps to ensure that slightly warmer air does not collect at the top of the attic. When the roof is radiating heat from the attic, it can cause snow to melt, which will then run down the side of the roof. As melted snow meets freezing air again, it will end up turning into ice dams.
Ice dams can end up causing gutters to freeze, and it also creates a wall of ice that other melted snow cannot flow past. This can put enormous additional weight on the edge of a roof, and it can make leaks more likely to form.