How to Build a Recessed Dryer Vent Box

Measure 1-foot lengths along the 2-by-4 with the measuring tape, marking each foot off with the pencil.

Cut the 2-by-4 into three 3-foot sections using the circular saw. Nail the 2-by-4s together to form a U-shaped frame.

Line the interior of the frame with the metal backsplash panel. Lay the wooden frame down on the ground, and place the metal panel on top of it so the top of the panel is even with the tops of the two boards on the sides of the frame.

Notch the metal panel with the metal shears. If the panel overhangs the sides of the frame by 2 inches, then measure 2 inches in on the bottom side of the panel and cut a small notch into the panel with the metal shears. If the bottom of the panel overhangs the bottom of the panel by 3 inches, measure 3 inches up on each side of the panel and make a notch.

Cut out the bottom corners on the metal panel. Cut into the panel at the notches you made, moving in a straight line until the notch from the bottom of the panel intersects with the notch on the side of the panel at each corner.

Bend the narrow section at the bottom of the panel upward until it is at a 90-degree angle to the rest of the panel. Bend the side sections of the panel that stick out beyond that narrow section up at a 90-degree angle too. You should now have a three-sided box that fits inside the wooden frame.

Apply the sealant to the inside of the wooden frame, then slide the metal liner inside of it. Allow it to dry for a couple of hours.