How to Build a PVC Window Box
PVC boards offer the look of painted wood plus protection from the elements
A window box bursting with blossoms will brighten any window, from inside or out. If you buy a stock one, you'll have your choice of designs, but you'll also be limited to standard lengths—typically 2 to 6 feet, in 6-inch increments.
Building the paneled box shown here offers you the chance to tailor your planter to the width of your window and select molding to match your home's style. PVC boards come in white but can be painted any color. Either way, they mimic the look of painted wood without being a target for rot and mold. They're available at home centers in the same dimensions as traditional lumber. If you prefer to work in wood, choose a water-resistant species, like teak or cedar.