- Measure the length and width of your window and gather enough soda cans to cover the area. For a window 24 inches wide by 36 inches long, you'll need 48 soda cans if they're 6 inches tall by 3 inches wide. Rinse and dry all of the cans and remove all of the tabs.
- Drill down through the bottom and top of 32 of your soda cans with a 2-inch boring bit. Push slowly to avoid crumpling your cans. Drill through the top of your remaining 16 cans. Drill a second hole through the back of these cans about 1/2 inch from the bottom.
- Run a bead of silicone glue around the top of eight of your back-drilled soda cans. Press the bottom of a bottom-drilled soda can into each bead of caulk. Continue until you have eight columns of five cans. Press the top of the last eight back-drilled soda cans into the bead of silicone caulk on the fifth can of each column.
- Run a bead of silicone caulk down the left side of one column. Press a second column into it, continuing until all of your columns are glued together. Make sure the holes in the back-drilled cans all face the same direction. Let the silicone dry for two hours and spray paint the can wall black. Let the paint cure overnight.
- Cut a piece of cardboard to your window's measurements with a utility knife. Cut a 2-inch rectangular window across the top and bottom of the cardboard about 1/2 inch from the edge. Glue the can wall to the cardboard with silicone glue, making sure the back-drilled holes line up with your windows.
- Punch a hole in the top corners of the cardboard with your awl. Slip the S-hooks through the holes and hang the panel from a curtain rod.
Things You Will Need
- Soda cans
- Electric hand drill
- 2-inch boring bit
- Silicone caulk
- Black spray paint
- Utility knife
- Paint or glue decorative fabric over the back of your heating panel to match your décor. You can also frame it with half-round molding.
- Glue cork or very thin steel flashing to the back of your cardboard to create a message board. You can also spray paint it with chalkboard paint for a similar effect.