Settled concrete steps? Epp lifts them. When the steps themselves are sound.

A settled set of concrete stair steps. The front porch stoop that has dropped 2 inches away from the door threshold, basement entry stairs that have tilted to one side, garage steps that have settled into a tripping hazard at the slab joint. Is one of the most common small-scope calls Epp Foundation Repair takes across Nebraska, Iowa, Kansas, and Missouri. Since 1994 we have lifted thousands of these step sets with concrete leveling on step sets, and the diagnostic question is usually simple: is the concrete itself intact, or has it cracked through? When the steps are sound and only the fill below has settled, polyurethane foam injection lifts the entire stair set back to grade in a couple of hours. Residential concrete stair sets in this region. Particularly the porch stoops poured onto fill in front of houses built in the 1960s through 1990s. Almost always sit on minimal compacted backfill. The original construction often used the soil pulled out of the basement excavation as porch stoop fill, placed in shallow lifts and tamped by foot or roller rather than engineered compaction. Over 20 to 50 years that fill consolidates further, especially after wet-dry cycles and freeze-thaw events, and the stoop drops. The step-to-house joint opens up, water gets behind the stoop, freeze-heave widens the gap, and the homeowner ends up with a step that has dropped 1 to 3 inches below the door threshold.

A poured concrete porch stoop, basement entry stair set, or garage step set is essentially a small slab cast on shallow fill. Like any slab, it has almost no flexural strength relative to its dead load. Once the fill below loses 1 to 2 inches of thickness through consolidation or erosion, the slab loses bearing across most of its bottom and drops as a unit. The lift mechanism for foam injection is the same as on a driveway slab or a sidewalk panel: drill 5/8-inch ports through the step or the adjacent landing, inject two-part polyurethane resin, the resin expands 20 to 30 times and fills the void below, the step lifts. Across Nebraska, Iowa, Kansas, and Missouri, the most common settlement signature on porch stoops is a step set that has tilted away from the house. The outside edge has dropped further than the house-side edge because the fill at the outside edge of the stoop sees more wet-dry cycling and more freeze-thaw exposure. The 50-plus freeze-thaw cycles NE and IA see each winter freeze residual moisture in the stoop fill and lift the slab a fraction of an inch each cycle; that lifted material doesn't fully settle back when it thaws, and over decades the cumulative effect is a slab that has tilted, dropped, and pulled away from the house. In the Kansas-Missouri clay belt the more common cause is expansive clay heave around stoops and entry stairs. Clays with plasticity index above 30 swell 15% volumetrically when wet and shrink the same amount when dry. A stoop poured on clay fill cycles through expansion and contraction faster than the rest of the foundation because it has less mass and dries faster. Root pressure from adjacent landscaping is the third common driver. A maple, ash, or elm planted within 10 feet of a stoop draws soil moisture during summer drought, the clay or loess shrinks, and the stoop corner closest to the tree drops.

Five conditions Epp checks before quoting a step lift

1. Step structural condition. Hairline cracks across a step are normal and do not affect liftability. Cracks through the full thickness of a step. Particularly a tread or riser cracked all the way through. Usually mean the step needs replacement, not lifting. 2. Spalling and salt damage. Steps that see heavy winter de-icing salt application can scale or spall deeper than 1/2 inch on the tread surface. Cosmetic spalling does not prevent lifting; structural spalling on a tread edge does. 3. Step-to-house joint condition. The flashing or sealant at the joint where the step meets the house often fails as the step drops away. Epp lifts the step back to elevation but does not re-flash the joint. That is a separate trade. 4. Adjacent stoop or landing condition. Many step sets are part of a larger porch stoop, basement entry well, or garage landing. Epp lifts the entire unit as a system when the components are tied together; the lift target reflects how the whole assembly should sit. 5. Handrail attachment. Some step sets have handrails bolted into the concrete. Epp does not remove, modify, or reinstall handrails. That is a carpentry or handyman scope. The handrail moves with the step during the lift.

When the diagnosis clears the steps for lifting, Epp uses polyurethane foam injection through 5/8-inch ports drilled either through the step itself, through the adjacent landing or stoop, or through a sidewalk or driveway slab tied to the step assembly. The choice of port location depends on where the void is and how the step set is configured. For a porch stoop, ports usually go through the top landing or the back edge near the house. For basement entry steps, ports often go through the surrounding sidewalk or driveway slab. For garage steps, ports typically go through the garage floor adjacent to the step set. Foam is the right answer for stair lifts because the work is fast (most jobs complete in 1 to 2 hours), the holes are small (5/8 inch, patched flush with color-matched material), and the foam is hydrophobic. It will not wash out under the freeze-thaw and downspout-spray conditions that typically caused the settlement in the first place. The step is walkable immediately after the lift. A lift target is set before injection begins. On porch stoops the target is usually a half-inch shy of the door threshold to allow for normal threshold weatherstripping clearance and a slight pitch away from the house. On basement entry steps the target is whatever elevation restores normal stair geometry. Equal riser heights from top to bottom, level treads.

Nebraska and western Iowa sit on windblown loess. Stoops poured on loess fill consolidate over 20 to 50 years as the fill slowly densifies. The 50-plus freeze-thaw cycles each winter accelerate the process by freezing residual moisture and lifting localized sections, which never fully settle back when they thaw. Kansas and Missouri stair sets more often deal with expansive clay shrinkage during summer droughts pulling the stoop corner down. After 30 years of repairs across Lincoln, Omaha, Council Bluffs, Kansas City, and St. Joseph, we see the loess and clay patterns repeat across thousands of porch stoops, basement entries, and garage step sets.

Epp Foundation Repair lifts the step set. Epp does not replace cracked, spalled, or broken step blocks. That is a mason's scope. Epp does not add, modify, or replace handrails. That is a carpenter or handyman scope. Epp does not re-flash the joint where the step meets the house. That is a roofing or siding contractor scope. Epp does not resurface step treads with decorative coating, tile, or stain. That is a specialty coating contractor. When a step set is structurally cracked through, deeply spalled across the tread surface, or otherwise too damaged to lift as a unit, Epp says so on the Customized Repair Estimate and recommends replacement. When a homeowner has both a settled stoop and a settled adjacent sidewalk or driveway, Epp typically lifts both in the same visit and prices them as a combined scope. Epp Foundation Repair is BBB A+ rated and a two-time BBB Integrity Award winner (2011 and 2016). Every step lift comes with a written scope, a measured lift target, and Epp's 5-year PolyLift warranty against failure of the material to lift or stabilize due to defects in materials or workmanship.

Customized Repair Estimate after on-site inspection reflects your scope. If the front step has dropped below the door threshold, an entry stair tilts toward the yard, a basement entry stair has settled into a water-trapping basin, or any step set has become a tripping hazard, schedule a free inspection. Step settlement compounds. The more it drops, the more water it traps at the joint, and the faster the next inch of settlement comes.