For a gable vent you start by removing the siding and sheathing in your determined area with a circular saw avoiding any unnecessary contact to the gable studs after creating a space for the vent line the hole with caulk and place the vent inside.
Installing an attic vent in vinyl.
How to install gable vents in an attic.
Soffit vents can be installed any time.
Measure the thickness of your attic floor insulation or wall and ceiling insulation if the attic is finished and ask your building department or a home center whether you should add more.
Soffit vents are one of the most popular intake vent styles.
Adding proper venting to your attic can cause dramatic drops in summer cooling costs.
Whether you choose to employ flow through cooling with a gable vent.