Too Much Roof Ventilation

For the best results place roof ventilation near the roof s peak and soffit vents in the eaves.

Too much roof ventilation.

Ventilation can be accomplished using various products and techniques. Vents come in various styles. The two main dangers associated with too much ventilation involve roof damage and increased utility bills. One static vent style is the turbine vent.

Enter square footage calculate or enter the square footage of the attic or area to be vented. If you have too much air circulating your roof will collect moisture causing damages that will weaken spots and then cause leaking. Attic ventilation keeps the air moving and stops mold from growing but too much ventilation can be just as bad as having none. Homeowners can choose from a variety of shapes and colors that closely match their shingles so that the vents won t appear too out of place on the roof.

Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. 2 focusing only on heat buildup. If a roofing contractor is going to be out of balance with the attic ventilation system it s better to have too much intake than too much exhaust because the excess intake converts to exhaust on the leeward side of the house. Air flows in through the soffit vents and out through the roof vents.

Insufficient ventilation can lead to moisture problems during the winter and decreased energy efficiency during the summer but too much ventilation can be just as bad if not worse. Roof vents create an additional roof penetration essentially another place of vulnerability where leaks can occur. To keep air flowing your roof needs just the right amount of attic ventilation. Grab a flashlight and inspect your attic during the winter.

It s important to remember that it s better to have too much intake ventilation than too little and many homes often undercalculate the amount of intake needed so worry less about having too much intake and err on the side of having more. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca. Dangers of too much ventilation. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space.

Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. Watch to find out how much ventilation your roof needs to keep air flowing and stop mold before it starts.