Not every crack in a concrete floor needs the same fix. That’s the part most people miss when they start comparing concrete crack repair services. A hairline surface crack needs one kind of fix. A structural crack letting water through needs something else entirely, at a different price point. This guide walks through how to match the right repair to your crack. It also covers what it should cost, and how to vet a specialist properly.
Not All Cracks Need the Same Fix
Cracks generally fall into a few categories. Fine surface cracks, often from shrinkage, that don’t affect strength. Structural cracks, wider and often linked to movement or overload. And active cracks, still shifting or letting water through. Get the category wrong, and you risk paying for a fix that doesn’t solve the problem. A good specialist checks the cause first, not just the gap. Age of the building can play a part. So can recent groundwork nearby, or even the season.
Matching the Repair Method to the Crack
Different cracks call for different repair methods.
- Epoxy injection — used for structural, load-bearing cracks. It restores strength while sealing the gap.
- Polyurethane injection — used for active leaks. It expands and seals, even where water is still present.
- Routing and sealing — used for surface or shrinkage cracks that aren’t structural. It fills the gap with a flexible sealant.
- Stitching — used for wider structural cracks. It ties the concrete back together with steel staples or bars, before sealing.
A specialist should explain which method fits your crack, and why, before quoting a price.
How Much Does It Cost to Repair Cracked Concrete?
Costs vary a lot by method and crack severity. As a rough guide, a simple surface crack might run £150 to £400. That’s for a home job, repaired by routing and sealing. Epoxy injection for a structural crack typically costs more. Often £300 to £800 per crack, based on length and access. Larger commercial jobs usually get quoted per project instead of per crack. Think multiple cracks, or wider structural stitching work. These can run into the thousands. Always ask for a breakdown showing the method used, not just a flat number.
What to Ask Concrete Crack Repair Contractors Before You Book
A short list of questions filters out weak options fast.
- Which repair method do you recommend for this crack, and why?
- Does the work follow BS EN 1504, the UK standard for concrete repair materials?
- What warranty comes with the repair, and what does it actually cover?
- Can I see photos or references from a similar job you’ve completed?
- Will you check the cause, or just fill the gap you can see?
Reliable concrete crack repair contractors answer these fast. Vague answers, or a rush to book you in, are worth noticing.
Red Flags When Choosing a Crack Repair Service
A few warning signs are worth watching for.
- A quote given from a photo alone, with no site visit.
- No explanation of which repair method will be used.
- No warranty offered, or a vague one with no fixed term.
- Heavy pressure to book right away, often with a “today only” discount.
- A flat price that doesn’t change regardless of the crack’s size or type.
Is a Warranty Included With Crack Repair Work?
It should be. Good contractors back structural repairs with a written warranty. It often runs several years, based on the method used. If a contractor won’t put a timeframe in writing, treat that as a warning sign, not an oversight.
DIY Crack Filler vs a Professional Repair
A tube of crack filler can handle a truly cosmetic hairline crack. One that isn’t growing, and isn’t linked to any structural issue. It won’t do much for anything wider, active, or connected to water ingress. DIY filler sits on the surface. It doesn’t address whatever caused the crack, and it won’t restore any lost strength. If a crack keeps coming back after filling, the underlying cause was likely never actually fixed.
Need concrete crack repair services that actually match the method to the problem? Smart Construction RO Ltd is a Flexcrete-approved concrete specialist based in Worksop, Nottinghamshire. The team works to BS EN 1504 standards on commercial and industrial sites across the UK. They use epoxy injection, polyurethane injection, or structural stitching, based on what each crack needs.
