Lyn in Pennsylvania asked the following:
Do I need gable vents if I have a top vent? The house was built in the mid 70s and upstairs is always hot in summer and cold in winter. New siding and roof installed three years ago. New AC unit was installed this month and was told we needed side vents if upstairs is to be cooler. Getting mixed advice.
You need PROPER VENTING.
Lyn in PA:
For an attic to vent correctly, you need a vent that pulls the air and another venting source that allows the air to enter and pull through, such as a roof ridge vent and soffit vent combination. This allows the air to flow freely and exhaust out through the ridge or roof vent.
A gable vent is usually a side power-operated vent that pulls air through an attic. They do not work and can be counter-productive with rooftop vents. Adding vents at the soffit would be a better choice to pull the air up through the power-operated rooftop vent or ridge vent.