The Problem
The front stoop on this 1972 Plum Grove home had been moving for years. By the time the owner called us, the top landing course had settled roughly 2 inches below its original position on the left side, the porch cheek walls were bowing outward at the base, and three of the stoop treads had cracked horizontally across their full width. The structure was functional but visually failing and posed a tripping hazard at the top step.
When we demolished the stoop to assess the foundation, we found the original concrete footing had never been poured to frost depth - it was sitting at about 18 inches below grade, well above the 42-inch minimum required in this climate zone. The footing had heaved repeatedly through freeze-thaw cycles and taken the brick structure with it. This was a rebuild problem, not a repair problem.
Our Solution
We removed the entire stoop and porch structure down to the footing. The original footing came out in sections. We formed and poured a new 4,000 PSI concrete footing at 48 inches below finish grade with #4 rebar on 12-inch centers both directions. We waited four days for the footing to reach initial cure strength before beginning brick work.
The new stoop and cheek walls were laid with new modular brick matched to the existing house brick in color and texture, with Type S structural mortar throughout. Type S is required on structural masonry that carries load and is exposed to ground-level moisture and freeze-thaw stress - Type N is not appropriate here. Bed joints were held to 3/8 inch with a full mortar bed, no furrow running down the center of the joint, which is a shortcut that leaves a hollow channel under the brick.
Stoop treads were rebuilt with a 1/4-inch per foot forward slope to shed water away from the entry threshold. The top landing was corbeled 1/2 inch over the riser face for a defined drip edge.
The Result
The new stoop sits level, plumb, and at the correct elevation relative to the threshold. The cheek walls are tied into the house brick courses at every third course using stainless ladder reinforcement. The footing is now at frost depth and will not heave. The homeowner has a structurally correct entry, not a patched version of a failing one.
Frequently Asked Questions
Why does the footing depth matter so much for a front stoop? Frost heave is the primary reason stoops and porches fail in this climate. The soil below frost depth - 42 inches in the Chicago area - does not freeze and move in winter. A footing that ends above frost depth is sitting on soil that expands and contracts every year. Over time that movement cracks the masonry above it. A correctly placed footing simply does not have this problem.
Why Type S mortar instead of Type N on the stoop rebuild? Type S has higher compressive strength and better bond strength than Type N, which makes it the correct choice for structural masonry that carries weight and sits at or near grade. The stoop and cheek walls take both vertical load from foot traffic and lateral stress from freeze-thaw movement of surrounding soil. Type N is appropriate for repointing softer brick in above-grade non-structural applications.
Can a deteriorated stoop always be rebuilt to match the existing house brick? Usually, yes, but with limitations. Brick from the early 1970s is still occasionally available through regional suppliers, and the color range of postwar modular brick is relatively predictable. We source replacement units before committing to a project and show the homeowner a dry-stacked comparison before we start. If the match is outside acceptable range, we discuss alternative options, including a full brick soldier course border that frames the new work intentionally.
