Foundation Repair: What's Safe to DIY and When to Call a Pro

Foundation companies have an obvious bias when they answer this question, so let's be specific instead of scary. A real chunk of foundation protection is absolutely DIY territory, and doing it yourself can save you from ever needing us. Structural repair is a different story — not because it's mystical, but because getting it wrong is expensive in ways that don't show up until later.

Genuinely good DIY jobs

Monitor your cracks like a scientist. This is the highest-value free thing a homeowner can do. Mark the end of each crack with a pencil and date it. Measure the width at its widest point and write it on the wall. Take photos. Re-check every couple of months and after big weather swings. A crack that hasn't moved in a year is history; a crack that grew is evidence. Either way, you've turned worry into data.

Extend your downspouts. Flexible extensions cost a few dollars each and move roof water 4–10 feet from the foundation instead of dumping it right beside the footing. Given Mobile's rainfall, this is probably the highest return-on-effort foundation project in existence. Do all of them, not just the front two.

Fix the grade with a shovel. Soil should slope away from the house — roughly an inch per foot for the first several feet. Years of settling flowerbeds and mulch buildup often reverse that. A weekend with a shovel and a few bags of topsoil (soil, not mulch — mulch holds water) restores it. Just keep soil several inches below any siding or brick weep holes.

Water evenly in droughts. This one surprises people. In a dry Gulf Coast late summer, clay soil shrinks away from the foundation and houses move. A soaker hose run around the foundation a couple of times a week during drought keeps the soil moisture — and therefore the house — steadier. Cheap, easy, effective.

Seal hairline cracks in exposed concrete. For stable, non-structural cracks in a garage slab or driveway, urethane concrete caulk keeps water out. Sealing is maintenance, not repair — the point is stopping water entry, and that's a fine DIY outcome.

Where DIY goes wrong

Jacking up your own house. Bottle jacks are cheap and crawl spaces are accessible, and this is still a bad idea. Lifting a settled structure is a sequencing problem — how much, where, in what order — and getting it wrong cracks drywall, breaks plumbing, and racks frames. Worse, a house on temporary jacks with no engineered support under it is genuinely dangerous to be under. Pier-and-beam correction is skilled work; see what it involves.

Stacking blocks under a sagging beam. The classic crawl space "repair" we find under older Mobile homes: dry-stacked blocks or scrap lumber wedged under a low spot. It transfers load to unprepared soil, tips over time, and usually hides the actual problem — a rotted sill or undersized span — until it's much bigger.

Cosmetic-patching structural cracks. Mortar and caulk over a stair-step crack doesn't stop movement; it just resets the evidence. If the cause is still active, the crack returns — and now nobody can read its history. Patch after the cause is fixed, not instead of fixing it.

Pouring concrete "footings" next to a settled corner. Adding concrete beside a foundation doesn't transfer the house's load onto it. Piers work because they're mechanically connected and driven to load-bearing soil — neither is true of a DIY pour.

Any load-bearing decision without measurements. The honest line between DIY and pro isn't about tools, it's about information. Structural repair decisions need floor elevation data, an understanding of what's moving and why, and a plan for the water that caused it. Without those, even competent work solves the wrong problem.

The middle ground: free diagnosis, then decide

Getting a professional assessment doesn't commit you to professional repair. A good one gives you elevation measurements, tells you what's cosmetic and what's moving, and prices the real fix in writing. Sometimes the outcome is "do these two DIY drainage fixes and call us if the crack grows" — that's a result we deliver regularly, and it costs you nothing.

Measure first, decide second. Request a free assessment, or start with the DIY list above — your foundation benefits either way.