A rain collection tank for watering gardens and lawns has become one of the many new "green" ways to save water. The use of collected rainwater allows the gardener to water without chemicals, which makes it the best solution for organic gardening. Rain barrels or tanks have been used for centuries to collect water for both human and animal consumption, as well as to irrigate plants in dry areas.
Wash and rinse a large 55-gallon barrel. This will serve as the tank for rain collection.
Lay the 2-by-2 lumber pieces together in a square on your worktable.
Use two 8-penny nails, 4 inches long, to connect each corner of the square.
Stretch the aluminum screen over the top side of the wooden square.
Secure the screen in place to the outside of the square using staples.
Place the screened frame over the opening of the barrel, screen side up.
Place the barrel where you receive runoff from the roof. If you have a gutter system installed, cut a downspout to fit several inches above the barrel screen.