Polyjacking vs. mudjacking: questions that matter

What is polyjacking?

Polyjacking uses a two-part foam placed through small openings. The foam expands below the slab while the provider watches its movement.

Ask which foam is planned, where it will go, and how the lift will be controlled. Also ask when the surface may be used again and how water may affect the plan.

What is mudjacking?

Mudjacking pumps a flowing, cement-based grout under the slab. ACI says grout openings are often larger than foam openings, though each job plan can differ.

Ask about the grout mix, added weight, equipment access, order of work, set time, patches, and cleanup. Ask how the provider checks support below the slab.

How do you compare both methods fairly?

Give each provider the same slab, work area, lift goal, and finish goal. One proposal may include drainage, joint work, sealing, or extra support that another leaves out.

• Which slabs and edges are included?
• Will the work raise the slab, fill open space below it, add support, or do more than one of these?
• Where will openings be placed and how will they be patched?
• When may the area return to its normal use?
• What movement, appearance, or adjacent-surface outcomes are excluded?
• What evidence will show that the planned work was completed?

Which sales claims should raise questions?

Be careful with claims such as permanent, waterproof, no maintenance, or always cheaper. The slab, site, material, and quality of the work still matter.

The provider should explain why the method fits your slab. A brand name alone is not an answer.