CCall Home Help
Homeowner decision guideU.S. national guidance

evaluate options

Reviewed and updated September 22, 2026

How should homeowners compare mudjacking and polyurethane slab lifting?

Safety boundaryDo not drill injection holes, connect pumping equipment or attempt to lift a slab yourself. The work involves controlled pressure, hidden features and material-specific safety requirements.

Mudjacking uses a cementitious grout—a cement-containing mixture—while polyurethane lifting uses an expanding polymer material. Both are professional injection approaches that may be used to address a settled ground-supported slab. The first question is not which material is always better, but whether the slab is suitable to retain and what support or elevation correction the site needs.

Ask both bidders to explain the settlement cause, target elevation, support objective, material and limitations. Filling a void beneath a slab and intentionally raising it are related but different objectives. Neither material name proves that ongoing soil movement or drainage has been corrected. Compare the complete plan, including visible repair holes, site protection and written terms, without assuming a universal price, reopening time or lifespan.

Separate condition, intended use and project scope

Which situation best matches the project?

01

The bids use different materials for the same proposed elevation

Ask the contractor to identify the actual grout or polymer system and explain why it suits the site. ACI describes cementitious mixtures and polymer foams as different application options, with different handling and hole requirements. Those general distinctions do not establish that one proposal will perform better on this property. Request the product-specific information and the contractor’s assessment rather than comparing only the label.

Notice next: Place the target elevation, treatment area and material details side by side. Ask for clarification when the two proposals do not address the same outcome.

02

One proposal emphasizes support and the other emphasizes lifting

Clarify the objective. Filling a support void without an intended elevation change is not the same result as bringing a settled panel to a specified position. Research on highway foundation treatments makes this distinction, but its field results cannot be used as residential performance guarantees. Ask how the contractor will evaluate support and confirm the intended finished geometry for your slab.

Notice next: Request a written description of both the support and elevation objectives, including what evidence of completion will be supplied.

03

The slab or underlying condition may make either method unsuitable

Existing cracking, continuing settlement, binding against adjacent work and unresolved water conditions can limit the correction. Ask the assessor to compare replacement or additional site work rather than promising that injection will solve every problem. ACI notes that raising a slab does not itself correct poor underlying soil. The best-informed comparison may be between retaining and replacing the slab, not between two injection materials alone.

Notice next: Gather the previous repair history and ask what happens if the planned lift cannot be achieved or the slab later moves again.

Safe observation

What to record before contacting a professional

Use only safe, non-destructive observations and existing records. Do not create access or disturb a hazard to complete this list.

These observations organize a conversation; they do not diagnose the property or prove service availability.

What to record
  1. Photograph the whole settled area, existing cracks and transitions to doors, steps or other paving.
  2. Record the history of movement and any previous lifting, drainage or support work.
  3. Collect known utility, drain and other buried-feature records without drilling to locate them.
  4. Save each written proposal with the exact material, treatment limits, target result and exclusions.
Stop and get appropriate help
  • Stop a flatwork-lifting proposal when the slab’s structural role or building support is unresolved.
  • Have buried utilities, drains and other structures considered before injection; material can travel into unintended spaces.
Move from information to action

Who is the useful next contact?

Concrete lifting contractor for each proposed method

Ask each contractor to explain site suitability, material choice, monitoring, final appearance and limitations in the same level of detail.

  • Are you filling voids, raising the slab or both?
  • What evidence identifies the settlement cause and remaining support problem?
  • How will you verify the target result and manage unintended material travel?
  • What is excluded if the slab cannot be corrected or moves again?
Independent concrete, structural or geotechnical professional when the condition is uncertain

Use appropriate independent assessment when slab role, support or continuing ground movement is not resolved by the proposals.

  • Are you filling voids, raising the slab or both?
  • What evidence identifies the settlement cause and remaining support problem?
  • How will you verify the target result and manage unintended material travel?
  • What is excluded if the slab cannot be corrected or moves again?
Material manufacturer technical support

Use the actual material supplier for product-specific compatibility and performance documentation. No named residential lifting product is approved in this article.

  • Are you filling voids, raising the slab or both?
  • What evidence identifies the settlement cause and remaining support problem?
  • How will you verify the target result and manage unintended material travel?
  • What is excluded if the slab cannot be corrected or moves again?

Contact guidance explains who may help and what to prepare. It does not verify a provider, price, license, arrival time or acceptance of this request.

Professional help

Use this guide to prepare for a qualified local professional.

The available connection is limited to eligible new concrete projects. This guide remains available for decision support without presenting an ineligible phone route.

Repair-only concrete work is not connected by this line

Check licensing, service area, schedule, scope and written estimate directly with professionals you consider.

Short answers

Questions people ask before the call

Is polyurethane always better because it uses foam?

No universal winner is established. The site, actual material, support objective and execution matter, and general highway research does not prove a residential outcome.

Will either method repair the soil permanently?

Do not assume that lifting corrects all poor soil conditions. Ask which underlying causes the proposed work addresses and what remains.

Can I compare the bids by reopening time alone?

Only use a reopening instruction tied to the actual material, job and permitted use. This answer supplies no generic walk-on or drive-on time for either method.

Where this guidance applies

The explanation, safe observations and comparison questions apply as general U.S. homeowner guidance.

Permits, adopted codes, licensing, property responsibility and provider availability must be confirmed for the actual location and scope.

A ZIP code can help screen service availability; it does not establish a local fact, price, permit rule or provider commitment.

Sources and boundaries

What supports this guide?

No residential comparative success rate, cost advantage or lifespan is asserted.

Highway study results are not generalized to household slabs.

Material suitability, buried conditions and the achievable correction require site-specific assessment.