Installing Octagon Gable Vents

Using a level, mark the wall with a horizontal line and a vertical line to make sure the vent is perfectly aligned with the siding. Determine the location of the vent and use the template on the back of the carton to cut a 17" diameter hole in the gable. Attach backplate to the wall with nails or screws using mounting slots. Be sure to note top location. Cut siding to allow a 21" octagon opening for backplate. Install the siding over the outside of the backplate. Leave adequate room for normal siding expansion and contraction. Install cover plate by inserting attachment studs into attachment holes on backplate. Push cover plate inward to adjust and straighten.

Installing Round Gable Vents

Using a level, mark the wall with a horizontal line and a vertical line to make sure the vent is perfectly aligned with the siding. Determine the location of the vent and use the template on the back of the carton to cut a 17" diameter hole in the gable. Attach backplate to the wall with nails or screws using mounting slots. Be sure to note top location. Cut siding to allow a 21" round opening for backplate. Install the siding over outside flanges of the backplate. Leave adequate room for normal siding expansion and contraction. Install cover plate by inserting attachment studs into attachment holes on backplate. Push cover plate inward to adjust and straighten.