How Much Wood Do I Need for a 12x12 Porch? | Hunker
Railing is constructed from nine 4-by-4-inch boards to construct the three sides of railing. Spindles are usually placed 4 inches apart and made from 2-by-2-inch boards. For a 12-by-12-foot deck, you will need 108 of these. You may also choose to add three 1-by-12 inch boards as a skirt board. references.