Compare the same project boundary
Give each contractor the same starting description. Identify the existing concrete that stays, the section that comes out and any new area. A driveway replacement with a wider parking space is a different job from replacing only the original footprint.
Use a simple comparison sheet:
| Item | Quote A | Quote B |
|---|---|---|
| Area and removal limits | Included area or drawing reference | Same area or a different assumption? |
| Finish and edges | Texture, color and edge treatment | Same finish or an allowance? |
| Retained features | Steps, paths, gate posts and landscaping | What is protected or changed? |
| Access and cleanup | Equipment route and debris removal | Any separate work? |
You can leave unanswered cells blank for the contractor to explain. Approximate measurements can help, but final quantities need checking on site.
Check what happens below the finish
A smooth-looking proposal tells you little about the ground beneath the slab. Ask what the quote includes for removing unsuitable material, preparing support and addressing areas found after demolition.
NRMCA’s cracking guidance explains the importance of uniform support. It also distinguishes reinforcement that can limit crack width from a promise to prevent every crack. A claim of “reinforced concrete” does not answer every design question.
The joint plan is another separate decision. Ask where planned joints and connections will go, particularly around corners, an existing driveway or a house. The base preparation guide explains what to clarify before the ground is covered.
Separate allowances and exclusions
An allowance is an amount set aside for work that has not yet been fully defined. Ask what it covers, what would trigger a change and how the final adjustment is agreed.
For example, one proposal may include demolition and haul-off while another lists them separately. Do not add a separate removal allowance to a total that already includes it. Tex-Tex Concrete’s published DFW pricing illustrates why this matters: its replacement example includes removal, while other items are shown as separate rates. These are that provider’s examples, not prices offered by this website.
Check whether access equipment, permits, grading, drainage work and landscape restoration are included or excluded. The cost guide helps distinguish a published example from the price of your measured project.
Agree the handover and change process
Before accepting a quote, ask who approves extra work and whether you will receive the proposed change in writing before it begins. This is especially useful when the old slab hides the condition of the ground.
Also ask who will provide curing instructions, permission to resume each intended use and a contact for questions afterward. These details belong in the agreed terms; they are not services every contractor automatically includes. Use the handover checklist during that discussion.
Ready to price your project? Get a Concrete Quote with the work you have in mind, your city or ZIP and a callback number. You do not need a completed comparison sheet to start.