
Which five photos help most?
Use daylight and no filters. Keep the photo dates. Do not stand in traffic, on loose concrete, or near an unsafe edge.
- One wide view showing the surface in the property context.
- The affected slab edge from each direction of travel.
- A close view with a ruler or common object for scale.
- Cracks, joints, drains, doors, curbs, coping, or adjacent structures.
- The equipment access path and any gates, stairs, landscaping, or interior finishes.
What should you measure?
Estimate length and width. Count panels or joints. Measure the height change at safe edges. A simple sketch may help more than a long note.
These are starting measurements. They do not replace an on-site check or show how much open space is below the slab.
What site facts should you write down?
Note when you saw the change, whether it is growing, where water moves, recent storms or drainage work, downspouts, past repairs, and known utilities.
Explain normal use and timing. Include cars, walking, doors, pool use, equipment, and times when the area must stay open.
Which questions should every provider answer?
Ask for a written scope that names the slabs, goal, material, drill and patch plan, use timing, limits, nearby-surface duties, and warranty terms.
Ask what could stop the work, change the method, point to replacement, or require another expert.
Primary sources
- American Concrete Institute — Slabjacking RAP 11American Concrete Institute · Accessed July 31, 2026
Sources support general guidance. They do not determine the condition or appropriate repair for a specific property.