Start with stringer boards, attached to the house. After firmly attaching the stringer boards, attach the lowest riser to the board, and attach the steps. Repeat until the wood stair is complete.
Ensure that all measurements are accurate and complete. Many home centers sell stringer boards, which eases the difficulty of the process. Also, make sure to use pressure-treated boards to help with weathering.
Place a stringer board at each end, and every 16 inches between the two boards. Measure the width of the opening, and use a 2-by-4-inch board to anchor the stringer onto the house (making sure to take 3 inches off the board because of the thickness of the stringers). Remember, if drilling into brick, use pilot holes with a masonry bit and anchors for the screws.
After securing and leveling the stringers, nail a 1-by-8 to the lowest riser to the boards. Cut 5/4-by-6-inch boards, allowing for overhang on each end. Use two boards for each step, to alleviate possible bowing or cracking. Nail these boards into place as the steps. Use 1-by-8-inch boards as the remaining risers, and continue using two 5/4-by-6-inch boards as the steps.