Frequently Asked Questions

  • What causes concrete to settle?

    Poor or insufficient compaction of the subsurface can result in a low-quality installation. Settling primary occurs because the slab's weight compacts the subsurface further after it has hardened, and sometimes it can quickly settle.

  • How big are the injection holes?

    Virtually invisible 5/8 "(gram size) hole, while traditional mud extraction companies use a 1 5/8" - 2 "injection hole. Not only are our holes much less visible, but their size largely preserves the structural integrity of the concrete.

  • How long does it take to get my concrete lifted and levelled?

    It depends on the size of the job, of course, but the average small job can be completed in as little as 2 to 3 hours with the right equipment.

  • What do you do with the holes when you're done?

    Holes in your driveway are repaired with a Portland cement / concrete mix.

  • How long does it take for polyurethane to set?

    In almost all cases, most areas can be used immediately after we're done.

  • What surfaces can be raised, lifted, and levelled?

    We can lift any form of concrete slab. Solid concrete slabs can be lifted and stabilized. The "terrace stones" or paving cannot be raised /levelled, they would have to be replaced or re-laid in order to resolve settlement problems. We also con only lift asphalt that has concrete beneath it.

  • What are payment terms for service work?

    Payment is due within 7 days of the order / invoice date, unless otherwise stated. 

  • Is a deposit required for work to begin?

    No. Payment isn't always required till after the concrete raising, lifting, and levelling is completed. However, payment is due within seven (7) days of completion.

  • Is there a warranty?

    If the concrete slabs on your property sink more than ½” in less than 365 days, Quattro Contracting will correct the settled slabs. Complete guarantee information is on our website and estimating proposal; the guarantee is 100% transferable.

  • Do I need to be home for an estimate?

    Attendance is only required if the area in question is indoors, there are pets, or in an enclosed building or patio. If you have extenuating circumstances that would make it difficult to be present for the entirety of the project,

  • How do I accept the quoted proposal?

    You'll need to sign the estimate electronically to approve the work and pricing to start the job. A signature of approval is required before work begins, even if not submitted electronically. 

  • What happens to the cracks on the concrete?

    Unfortunately, the cracks are still there, but most of the time they "close" when the concrete is returned to its original location. If they are left untreated, the cracks will only grow larger. We're happy to offer suggestions on how to fill and seal these cracks to avoid any unnecessary damage.

  • Are you licenced and insured?

    Quattro Contracting is fully licensed, insured and registered with the Workplace Safety and Insurance Board (WSIB) for your peace of mind.

  • What building permits are required?


  • Can we lift my asphalt or paving stone?

    No, not unless there is a concrete base underneath. 

  • How do we schedule my concrete lifting project?

    Once you have accepted our agreement, we will contact you to make plans for your project. If your project is urgent, we usually have some flexibility in our schedule to accommodate.

  • Do I need to be on-site when the concrete is being lifted?

    Generally not as long as the work is abroad; However, if the work is carried out indoors, e.g. on a garage floor, in an enclosed yard, or with pets; then the presence of an adult over eighteen years of age is required.

Our Work

Project Gallery & Before and Afters