Foundation Repair DIY: What You Can and Can't Do

DIY the prevention, hire out the structure

Here’s the honest line most contractor sites won’t draw clearly: on Central Texas clay, homeowners can do a lot of valuable foundation prevention themselves — but actual structural repair is not a DIY project. Knowing which is which saves you money and protects your home.

What you CAN do yourself

• Improve drainage — re-grade so soil slopes away from the house; extend downspouts several feet out. The single highest-impact DIY move. (More on drainage.)
• Keep gutters clear — so roof water doesn’t dump against the slab.
• Water your foundation — a soaker hose on a timer keeps clay from shrinking in drought.
• Manage tree roots — root barriers near big trees reduce moisture loss from the soil.
• Seal non-structural cracks — a DIY epoxy/polyurethane kit is fine for a thin, stable crack you’re sealing against water.

What you should NOT DIY

• Piering / underpinning — installing piers to lift and stabilize a foundation needs an engineer’s design, hydraulic equipment, and load calculations.
• Slab leveling — mudjacking and foam injection are precision jobs; over-lifting cracks the slab.
• Anything structural without a diagnosis — DIY “fixes” applied to active movement usually fail and can make it worse, and self-done work carries no transferable warranty (which matters at resale).

Rule of thumb: if it controls water or seals a cosmetic crack, DIY it. If it moves the structure, hire a vetted pro with an engineer and a warranty.

When to call a pro

If you have stair-step cracks, sloping floors, doors that won’t latch, or a crack that keeps growing, you’re past the DIY line — get a measured inspection. Not sure where you stand? Check your soil risk first, then talk to a vetted specialist if the signs are there.