Walkways and steps: judging rise, run and footing

Why walks and steps settle first

The ground right next to a house is usually the weakest ground on the lot. When the foundation was built, soil was dug out, the walls went up, and the space was backfilled, often in thick layers that were never fully compacted. That soil keeps settling for years. A stoop or the first section of a walk resting on it slowly drops or tips toward the house, opening a gap at the wall and sending rain toward the foundation.

Old utility trenches crossing the yard behave the same way, and so do low spots filled with debris. A contractor planning a new walk should probe these areas and either dig out and rebuild the base or carry the stoop on footings dug down to undisturbed soil. Ask which route they intend near the house.

The geometry of a comfortable step

People notice uneven steps instantly, even if they cannot say why. Each step has a rise, the vertical height, and a run, the horizontal depth where your foot lands. When every rise and run in a flight match, the steps feel natural. When one riser is taller or one tread is shallower, people trip, especially at night or carrying groceries.

Ask the contractor to show you how the total height will be divided into equal risers and how deep each tread will be. On steep front yards, the answer may be a series of shorter flights separated by level landings, which is easier on knees and more forgiving in rain. Rules on step dimensions, landings and handrails can apply, so check with your city or county before the design is final.

Landings, stoops and the front door

A stoop outside the front door needs to be deep enough to stand on while the storm door swings open, and it should sit a small distance below the threshold so rain does not run inside. It also needs a slight pitch away from the house. Many older homes in the area have stoops that have settled so far that the step up into the house is now awkward or the slab slopes back toward the door.

Where a walk meets a driveway, a porch or existing steps, an isolation joint lets the pieces move independently. Without that separation, a settling stoop can drag the first section of walk down with it and crack both.

Walkways on slopes and switchbacks

A straight walk up a steep yard can become a slide in a rainstorm. Gentler routes curve across the slope, add steps at the steepest points, or use a combination of ramped sections and short flights. A broom finish across the direction of travel gives better grip, and the walk should be crowned or cross-pitched so water runs off the edges instead of down the middle.

Look at where the runoff will go once it leaves the walk. On sloped Birmingham lots, a walk can act as a channel that concentrates water and erodes the soil at its edges. Small swales, rock-lined edges or a drain may be part of a good plan. Ask how the design handles a heavy summer downpour.

Base, thickness and reinforcement for walks and steps

Walks carry only foot traffic, so they are often poured thinner than driveways. They still need the same careful prep: topsoil and soft soil removed, a compacted crushed-stone base, and forms set to consistent width and pitch. Where a walk crosses a spot a lawn mower, a golf cart or occasional delivery truck might run over, a thicker section or added reinforcement may make sense.

Steps are more complex. Poured steps usually include reinforcing steel tying the treads and risers together, and they may rest on footings or on a thickened base. Ask how the steps will connect to the stoop or walk, and how the contractor will keep the risers and treads consistent while forming them.

Traction and edges people can see

• A broom finish, light exposed aggregate or a grit additive in any sealer improves footing in rain.
• Tooled or rounded edges on step noses resist chipping and are easier on shins.
• A contrasting color or texture on the edge of each tread helps visibility at dusk.
• Planning for low landscape lighting before the pour avoids cutting into new concrete later.
• Handrail posts are easier to set in fresh concrete or in sleeves placed during the pour.

Joints that line up with the walk

Walks usually get control joints across their width at regular intervals, with spacing tied to the slab depth. They also need joints where the walk changes direction or width, and at any corner, since cracks tend to start at those points. On curving walks, joints should radiate from the curve rather than cut across it at an angle. Ask to see where they will fall before the pour.

Isolation joints belong where the walk meets the house, the stoop, the driveway, existing sidewalks or any fixed object like a light post. They keep the new concrete from being cracked by movement in something else.

Older Birmingham homes and the front walk

Many houses in the older neighborhoods of Birmingham, Homewood and Bessemer sit above the street on a terrace, with a flight of steps cut into the bank and a walk leading to a raised porch. Those steps are frequently original, patched several times, and hemmed in by retaining walls of stone or block. Replacing them is partly a concrete job and partly a question of what the bank and the wall are doing.

If a retaining wall beside the steps is leaning or bulging, raise it with the contractor before any concrete is poured. New steps anchored into a failing wall inherit its problems. The contractor may suggest addressing the wall first, or may recommend a specialist for that part of the work.

Replacing an old walk or set of steps

If you are replacing an existing walk or steps, look at how the old concrete failed. Tilting toward the house suggests settled backfill. Heaving and cracking near a tree points to roots. Crumbling edges and exposed stones can mean weak concrete or poor finishing. Ask the contractor to explain what caused the failure and how the new design will avoid repeating it.

Walkways and steps — common questions

Related work

Where the work happens