01
How do the approaches differ?
A method name alone does not establish suitability, so compare how each would be applied to your slab.
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| Question | Pumped grout or slurry | Expanding polyurethane foam |
|---|---|---|
| How it is placed | Pumped beneath the slab through access holes | Placed through access holes and expands beneath the slab |
| What to confirm | That the mix and process suit this slab and its support | That the product and application suit this slab and its support |
| Finish follow-up | Access holes are patched afterward, and patches may look different | Access holes are patched afterward, and patches may look different |
02
What should the assessor explain?
- Which method is proposed for your actual slab, and why it fits that condition.
- How access holes and existing cracks will be handled during the work.
- What finish and return-to-use limits apply to the process being proposed.
- Which product-specific instructions apply to this job, rather than borrowing claims from another system.
03
What should you avoid assuming?
Another company's cure time, hole size, strength, warranty or environmental claim is not a general promise, and it should not be treated as one for your project. This guide compares approaches. It is not instruction for injecting concrete yourself, and it does not signal a dealer relationship with any branded product.