FAQ: Crack Stitch Concrete Repair

Installation & Application

  1. Should I fill the crack before using Crack Stitch?

    Yes. For optimal concrete crack repair, always fill the crack using a high-compression material like an epoxy solution or cement-based filler. While Crack Stitch stops lateral expansion, unfilled cracks can still shift vertically or horizontally. Filling the crack, combined with properly spaced crack stitches, ensures permanent repair of the crack.

  2. What tools are required to install the Crack Stitch concrete repair kit?

    You’ll need a circular saw or angle grinder with a 1/4"–3/8" masonry blade, an epoxy applicator, and a putty knife or trowel. For cement-based installations, you’ll also need mixer. A vacuum-connected dustless cutting system is also recommended. Always wear eye protection and gloves when working with concrete and epoxy.

  3. How deep and wide should I cut the slot for Crack Stitch?

    Cut each slot approximately 1/4" wide, 1" deep, and 11" long. If the crack is offset, make the cut deeper to ensure the carbon stitch is fully embedded in both sides of the concrete.

  4. How far apart should I space the carbon fiber stitches?

    Space stitches 10 inches apart for most concrete crack repairs. Load-bearing or structural repairs may require closer spacing—consult a structural engineer if needed.

  5. How long does it take to install each Crack Stitch?

    On average, it takes 3–5 minutes per stitch, including cutting, cleaning, filling, and placement.

  6. Can homeowners install Crack Stitch themselves?

    Yes, Crack Stitch is DIY-friendly for those experienced with epoxy and concrete cutting. However, we recommend hiring a contractor for the safest and most effective installation.

  7. What size cracks can be stitched, and how much embedment is required?

    Each stitch should be embedded at least 3–4 inches on both sides of the crack to achieve the specified strength. When used with a high-strength epoxy or cement-based material, the stitch bonds continuously across the crack, unlike products that only bond at the ends. Cracks wider than 1” should be evaluated for deeper structural issues before stitching.

See our full instructions here

Applications by Area

  1. Can Crack Stitch repair cracks caused by heaving or settling?

    Crack Stitch stabilizes lateral movement, especially when paired with a high-compression epoxy or cement-based material. For cracks showing showing signs of settlement or heaving, a more extensive structural repair may be needed if the cause isn’t addressed.

  2. Can Crack Stitch be used on basement walls and floors?

    Absolutely. Crack Stitch is ideal for basement wall repair, including poured and block walls and concrete floors. It helps restore structural continuity and prevent further crack expansion. If the wall is showing signs of deflection or settlement a more extensive structural repair may be needed.

  3. Is Crack Stitch suitable for garage floors and concrete driveways?

    Yes. It's a durable solution for horizontal concrete crack repair in slabs, especially under load or freeze-thaw conditions. Paired with an epoxy or cement-based material, it prevents shifting, settling, and heaving.

  4. Can Crack Stitch be used for pool concrete repair or pool decks?

    Yes. The carbon fiber used in Crack Stitch is corrosion-resistant and ideal for pool concrete repair around chlorinated and moisture-prone environments.

  5. Does Crack Stitch work for cracks in concrete block (CMU) walls?

    Yes. Its open-grid design allows it to anchor across mortar joints, making it a powerful concrete wall crack repair product for CMU construction.

  6. Can Crack Stitch repair large vertical cracks in concrete steps?

    Yes. Crack Stitch can be used to stabilize vertical concrete cracks in steps, though underlying soil movement should also be addressed to prevent future damage.

Performance & Durability

  1. How is Crack Stitch different from standard epoxy crack injection?

    While epoxy fills the void and prevents leaks, it doesn't provide structural reinforcement on its own. Crack Stitch reinforces the crack, ensuring a permanent bond and stopping movement that could cause epoxy failure over time. Since it’s cut into the concrete, the Crack Stitch is significantly stronger than a surface patch.

  2. What types of cracks can Crack Stitch repair?

    Crack Stitch repairs vertical, horizontal, stepped, shrinkage, heaving, and settlement cracks—making it one of the most versatile concrete crack repair products available today.

  3. How long does a Crack Stitch repair last?

    When installed correctly with a compatible epoxy or cement-based material, Crack Stitch delivers a permanent, corrosion-resistant solution that outlasts steel alternatives and injection-only fixes.

 

Product Information

  1. Does Crack Stitch come with a warranty?

    Yes. Crack Stitch is backed by a limited manufacturer’s warranty covering material and manufacturing defects. Full details are available at crackstitch.com/warranty. Labor reimbursement may be included if installed by a certified contractor.

  2. Can I paint or coat over Crack Stitch?

    Yes. Once the epoxy cures and the area is smoothed, you can paint, waterproof, or resurface the area as needed. When using epoxy, we recommend waiting at least 24 hours before applying paint or coatings.

  3. Can Crack Stitch be used with other foundation repair systems?

    Yes. It complements other foundation repair products like carbon fiber straps, wall anchors, piers, and waterproofing systems for complete structural reinforcement.

  4. Is Crack Stitch approved for use in load-bearing walls?

    Yes. Crack Stitch is often used on both load-bearing and non-load-bearing walls. Always consult a structural engineer or professional contractor if there are signs of more significant structural compromise.

  5. Will Crack Stitch stop water from leaking through cracks?

    Not by itself. When a crack is filled it can typically stop water leaks. Adding a member or performing a pressure injection may be necessary in severe instances.

  6. Does Crack Stitch prevent future cracks?

    It stops existing cracks from spreading. However, addressing the root cause (settlement, water intrusion, etc.) is essential to prevent new cracks from forming nearby.