Commercial Foundation and Slab Repair for Hill Country Properties

Building types this work covers

• Retail and strip centers. Slab-on-grade with storefront glass that cracks or binds when a bay settles.
• Office buildings and medical offices. Interior partitions and ceiling grids show movement early.
• Churches and fellowship halls. Large open spans, older additions joined to newer buildings, and masonry facades.
• Multifamily. Apartments, townhomes, and fourplexes where one settling building affects several tenants.
• Pre-engineered metal buildings. Shops, warehouses, and barns where column footings carry concentrated loads.
• Tilt-wall buildings. Concrete wall panels set on footings, where differential settlement shows up at panel joints.

How commercial foundations fail differently

Residential slabs usually move as a broad plate. Commercial structures concentrate load at columns, footings, and grade beams, so movement tends to show up at specific points. A metal building column footing can settle on its own and pull the frame and roof panels with it. Tilt-wall panels can rotate where a footing has dropped, opening the joint caulk and letting water in. Older churches and commercial buildings often have additions on different foundations, and the seam between old and new is where cracking starts. Interior floor slabs in warehouses and shops can also settle separately from the perimeter, especially where fill was placed under the slab or where a utility trench was backfilled loosely.

Warning signs on a commercial property

• Storefront glass cracking, or doors that will not close and lock
• Roll-up and overhead doors binding in their tracks
• Separation or open caulk joints between tilt-wall panels
• Cracks in masonry at building corners or at the line between an addition and the original structure
• Floor slab cracks with one side higher than the other (a trip hazard)
• Ceiling grid out of level, or cracked drywall at partition heads
• Water entering at the slab edge or panel base after rain

Engineering, permits, and documentation

Most commercial foundation repairs are designed or reviewed by a licensed structural or geotechnical engineer, and many need a building permit. Owners, property managers, lenders, and insurers also want a paper trail. A commercial scope should include an elevation survey, photos, the cause of movement as best it can be determined, a pier or footing plan that matches the engineer's requirements, and post-repair readings. Pier types and how they are chosen are explained on our foundation piering page. Drilled piers are more common on commercial work than on houses because they can be designed for heavier column loads.

Keeping the building open

Downtime is often the biggest cost on a commercial job. Exterior piering can usually proceed without entering the building. Interior work can be phased by bay or unit, scheduled after hours or on closed days, and fenced off to keep tenants and customers clear. Multifamily repairs are planned building by building with notice to residents. Agreeing on access, noise windows, parking, and dust control up front avoids surprises on site.

From inspection to closeout

A typical commercial project moves through a predictable sequence. First comes a site visit to walk the building with the owner or manager, take elevations, photograph cracks and joints, and note drainage. Next, the findings go to the engineer of record (yours, or one retained for the project), who sets pier type, depth criteria, and spacing. A fixed-price proposal follows that design, with a schedule, a phasing plan, and the permit path. During the work, pier depths and installation pressures or torque are logged for each location. At closeout you receive the final elevations, the pier log, and the warranty terms in one package, which is what a lender, insurer, or future buyer will ask to see.

Drainage on commercial sites

Large roofs and paved lots move a lot of water during a Hill Country storm. Clogged roof drains, short downspouts, and parking lots that slope toward the building are common causes of commercial settlement and slab-edge leaks. Fixing the water is part of the repair, and our drainage solutions page covers the methods. Residential owners in Boerne should see the Boerne foundation repair page instead.

Common questions

Do commercial foundation repairs require an engineer?

Most do. A structural or geotechnical engineer typically designs or approves the repair, and the contractor installs to that design. The engineer's letter is also what lenders, insurers, and buyers usually ask for.

Do you work on commercial floor slabs as well as foundations?

Yes. Interior slab sections that have settled or lifted at a joint can often be leveled with slab jacking or foam injection, or underpinned when the movement is deeper. Trip hazards at slab joints are worth addressing quickly on any property open to the public.

Can the building stay open during foundation repair?

Often yes. Exterior piering rarely affects operations, and interior work can be phased by area or scheduled outside business hours. The plan should spell out access, noise, and timing before work starts.

What causes metal building and tilt-wall foundations to move?

Usually a footing or column pad that loses support, from drying clay, poorly compacted fill, or water collecting at one corner. Because the load is concentrated, a single footing can settle and distort the frame or panel joints around it.

What documentation do you provide for a commercial foundation repair?

A documented inspection with elevations and photos, a written scope and fixed-price proposal suitable for owners and property managers, and post-repair readings. The warranty terms are stated in writing in the proposal.

Related guides

• What to Expect During a Foundation Inspection
• Foundation Repair vs. Replacement
• Does Homeowners Insurance Cover Foundation Repair?