How to Install a Dryer Vent With Siding

Determine where the ductwork will run, using the shortest distance possible from the dryer to the vent, and decide on the placement of the vent in the vinyl siding. The outdoor vent must be at least 1 foot above the ground and at least 1 foot away from any airway obstructions on all sides, such as air conditioners or shrubbery.

Mark intended spot for the vent on the interior wall with a pencil. Inspect the spot you've chosen and ensure there are no wires, pipes or other obstructions before drilling. If drilling through a finished wall where obstructions are not visible, use a 14-inch bit and power drill to drill a test hole through the interior wall only, in the center of where you plan to place the vent. Bend a wire hanger at a 90-degree angle, 6 inches from one end. Insert the 6-inch end into the wall and spin inside the wall in a full circle, checking for obstructions. Make adjustments and repeat the process if necessary.

Drill the test hole through the wall to the exterior, using the 14-inch bit and power drill. Go outside and check the test hole placement, making sure it's in the right spot.

Drill a14-inch hole, centered on the test hole, through the exterior wall using a bi-metal hole saw. Hold the drill straight and steady at all times. Pull the saw back out of the hole frequently while drilling to prevent overheating. When necessary, unplug the saw and use a screwdriver or chisel to remove material that accumulates inside the hole bit as it bores through the wall. Continue drilling until the hole saw is completely through the wall.

Slide the vent cap through the hole, level it with a level and mark the location of the vent's screw holes on the vinyl siding. Drill pilot holes using a drill bit sized appropriately for the screws that came with your vent assembly, then drill holes in the siding only, using a drill bit slightly larger than the screws, to allow for siding movement. The screws should attach to the exterior wall itself, but should not tighten down the vinyl siding. Tightening down the vinyl siding may create a warp.

Screw the vent cap to the exterior wall with the flap side facing down. Secure it tightly and evenly using a power screwdriver, but do not over-tighten. Insert the tube of acrylic caulk into the caulking gun with the nozzle facing the front. Squeeze the trigger and apply caulk to all four edges of the vent cap, between the siding and the cap, to protect against the elements.