Roof Ventilation No Soffits

Enter square footage calculate or enter the square footage of the attic or area to be vented.

Roof ventilation no soffits.

A passive ventilation system should have air inlets at the base of the roof usually in the soffits and outlets in the peak or gables. When the attic becomes part of the home to be heated and cooled open wall gable vents and roof vents are no longer feasible but the underside of the roof the sheathing and rafters can still get. With a soffit venting is not much of a challenge. Smart vent a special roof eaves vent product that provides a 3 4 opening about 6 above the top of the roof drip edge.

Master flow 2 in. Rose a research architect at the building research council at the university of illinois replies. However if the home has no soffit it is quite a different matter. Normal vented air likes to enter the attic lower down near the bottom third of the attic and as it passes through it will exit higher up near the top third of the attic space.

Install special roof intake venting products that work at the lower edge of the roof decking underneath the first course of shingles. For an attic without soffit vents you may have the option to use gable vents instead. Unless your roofing system has insulation on the roofing deck and is designed without ventilation your furnace should not be heating your attic. This is usually a 3 8 inch piece of plywood that is underneath the overhanging portion of the roof that extends beyond the outside wall.

Venting solutions for roofs with no overhang or soffit. They call this a venting drip edge. Some home designs do not have a soffit. 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.

One great alternative to a soffit ventilation system is to install an intake vent right at the lower edge of the roof. Master flow 15 amerimax home products 1 deflect o 1 gibraltar building products 1 mounting position. Resin circular mini wall louver soffit vent in white 6 pack model rlsc2 view the master flow intake vents 9 28 9 28. By virtue of their design and location on the roof ridge vents are predominantly exhaust devices.

More ways to filter. A ridge vent without a soffit vent doesn t work and here s why. Typically you would have a gable vent on each end of the attic. If you have an attic with no soffit vents but 2 unobstructed gable vents then you will probably be ok on ventilation.

The total venting space should equal 1 150 of the floor space. But if you don t have eaves or if you have shallow soffits like me ventilation can be a challenge.