Kitchen Herb-Garden Shelving Unit

Step 8 Line the Shelves with Plastic Sheeting

For both shelves, cut the plastic sheeting to make a piece a bit larger than the shelf. It should fit on the front edge of the shelf, but hang over by about 2" on the two back sides of the shelf that contact the wall. That's so you can fold those up when you attach the shelf to the wall and make a kind of drainage backstop to keep the water from just running off the back of the shelf and down the wall.

Put a few staples in along the front (see image) just to hold it in roughly the right place. Don't put staples anywhere other than the front edge of the shelves, or else water running down the plastic will be able to leak through to the wood through the holes punched by the staples. (The shelves are mounted to the wall tipped back a bit, so no water will run towards the front edge.)