Can I fix my foundation myself?

Some of it, honestly, yes — and it’s the cheap part that actually prevents movement. The structural part is not a DIY job, and here’s exactly where the line falls.

You can do the moisture management that prevents most Central Texas movement; you cannot safely lift or underpin a foundation yourself. Grading, gutters, watering, and sealing truly cosmetic cracks are homeowner jobs. Anything that involves raising the house, installing piers, or a crack that’s actively growing is a job for a crew and, first, an engineer. The trick is telling a cosmetic crack from a structural one — so you don’t caulk over a real problem or pay thousands for a hairline that was never going anywhere.

What you can genuinely do yourself

Fix the drainage. Extend downspouts past the slab, re-slope soil so it falls away from the house, clear beds that trap water against the foundation. This is the single highest-return thing a homeowner can do — see the drainage guide.
Water the foundation in a drought. A soaker hose on a timer, kept a foot or two off the slab, keeps the clay from shrinking away and dropping a corner. The drought routine walks through it.
Seal cosmetic cracks. A truly hairline, stable crack in drywall or a static slab crack can be filled with the right flexible sealant — as maintenance, once you’re confident it isn’t moving.
Monitor. Mark crack ends with a pencil and date, photograph them, and watch across a wet and a dry season. That log is worth more than any single measurement — the crack checker gives you a printable one.

What is not a DIY job — and why

Installing piers or lifting the slab. Underpinning uses the weight of the house as a hydraulic reaction and has to be engineered pier-by-pier; get it wrong and you crack what you were trying to save. This is skilled, insured, permitted work.
“Foam injection” kits for a settling slab. Consumer polyurethane kits are for lifting a sunken sidewalk slab, not for stabilizing a house on moving clay — they don’t reach stable soil.
Anything a permit covers. Structural foundation repair in most WilCo cities requires a permit backed by an engineer’s plan. That requirement exists precisely because this isn’t homeowner work.

Cosmetic vs. structural: the 60-second read

Probably cosmetic: a single thin vertical crack in drywall that hasn’t changed; fine curing lines in the garage slab with no lip; nail pops. Treat as structural until an engineer says otherwise: diagonal cracks from door and window corners, stair-step cracks in brick, a slab crack with a lip you can feel underfoot, a door that stuck and stayed stuck, or any crack that’s visibly grown across a season. When in doubt, it’s the change over time that decides — not the width. Full detail in the warning signs guide.

The cheapest expert money you’ll spend

Before you either ignore a crack or pay for piers, an independent structural engineer ($400–$900) will tell you which camp you’re in. They don’t sell repairs, so the answer is neutral — and plenty of homeowners learn the honest fix is drainage and watering, not underpinning. If it is structural, that same report becomes the scope every contractor quotes against. That’s the opposite of a DIY gamble: it’s the one purchase that keeps you from overpaying.

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