Venting Attic With No Soffit Access

How to vent a bathroom fan through soffit.

Venting attic with no soffit access.

Now that we have that out of the way let s get to the heart of the matter venting a house with little to no eaves or soffits. Mark the roof venting locations from the attic where you can see the rafters and avoid placing roofing vents over them. If you have an attic with no soffit vents but 2 unobstructed gable vents then you will probably be ok on ventilation. The main idea of the ridge vent is to act together with soffit venting to properly ventilate the attic.

Place all the roof vents on the same side of the roof. Poor insulation is usually the culprit although if you enter the attic on sunny winter day your attic space can be warmed by the sun more than your furnace. 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. 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.

The soffit vents are now installed but you still need to make sure there s no insulation blocking the new vents. A soffit exhaust vent cover is installed in a straight line as much as possible from the bathroom exhaust fan. Avoiding bends in the hose. In an attic without soffit vents you can add insulation in the corners and the wedges between the slope of the roof and the floor of the attic which serves as the ceiling for the room below.

If your roof peak runs parallel to the street put them on the backside where they ll be less prominent. Even for the second story bathroom you can access the attic to vent the moisture outside. The most common way to add ventilation to an attic is by installing air intakes in the soffits and putting an outlet at the gable of the house. 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.

The total venting space should equal 1 150 of the floor space. When hot air rises up through the soffit venting it then keeps rising all the way up to the ridge vent. This creates a natural suction phenomenon where the ridge vent is sucking air out of the soffit vents creating a natural ventilation cycle.