Why Our Floors Last
Concrete Surface Preparation
The least-glamorous part of epoxy flooring is the part that decides everything. Here’s exactly how we prepare concrete — and why it’s the corner cheap operators cut and we never do.
- 10-Year Warranty
- $20 million public liability Insured
- Diamond-Ground Prep
Ask any experienced floor coating applicator what makes a floor last, and they’ll tell you the same thing: it’s not the coating, it’s the preparation. A premium epoxy applied to a poorly prepared slab will fail — it will bubble, peel and delaminate within months — while a mid-range coating on a properly prepared surface will outlast the warranty. At Ironclad Floor Solutions, surface preparation isn’t a step we rush to get to the colour; it is the job. Everything you see and walk on sits on top of work you’ll never see, and that hidden work is what we stake our 10-year warranty on.
The reason poorly prepared floors fail comes down to bond. A coating has to be mechanically and chemically locked into the concrete. If the surface is smooth, dusty, contaminated with oil, or full of moisture, there’s nothing for the coating to grip — so the first time it’s stressed by hot tyres, traffic or temperature change, it lets go. Cheap operators skip preparation because it’s the expensive, labour-intensive, invisible part. That’s precisely why their floors don’t last, and why we do it properly every time.
01. Diamond Grinding
We mechanically grind the slab with diamond tooling to remove laitance, old coatings, glue and contamination, and to open the concrete pores. This creates the consistent CSP 2–3 profile the coating needs to key into — the foundation of every lasting floor.
02. Moisture Testing
Concrete transmits moisture vapour. We test the slab’s moisture so we can specify the correct primer or moisture-mitigation system. Skipping this is one of the most common reasons coatings blister and lift, especially on ground-level and older slabs.
03. Crack & Joint Repair
Cracks are routed and filled with structural epoxy or polyurea, and pitting, spalling and worn areas are repaired or rebuilt. We distinguish harmless shrinkage cracks from signs of structural movement — and we’ll always tell you honestly which you have.
04. Correct CSP Profile
The right Concrete Surface Profile (typically CSP 2–3 for our systems) ensures the coating grips mechanically. Too smooth and adhesion suffers; we match the profile to the coating system being installed.
05. Primer Application
A penetrating primer seals the prepared concrete and bonds the build coats to the substrate. It’s never optional on our jobs — it’s the link that holds the whole system together for the long term.
Preparation Is What Separates Us From DIY and Cheap Quotes
DIY garage floor kits and bargain quotes almost always skimp on preparation — a light acid etch, or nothing at all, before rolling on a thin coating. It looks fine for a few weeks. Then the hot tyres of summer lift it, the joints telegraph through, and the floor that cost less ends up costing more to strip and redo. Proper preparation is the line between a floor that lasts a decade and one that lasts a season.
Ready to see how this applies to your floor? Explore our garage floor epoxy and coating systems guide, or book a free on-site quote and we’ll assess your slab in person and tell you exactly what it needs.
Surface Preparation — FAQs
Why is surface preparation so important for epoxy?
Because a coating can only bond as well as the surface beneath it. A floor prepared by diamond grinding, moisture testing, crack repair and priming will last for years; one applied over a quick acid wash or a damp, dusty slab can bubble, peel and delaminate within months. Preparation is the single biggest factor in a coating’s lifespan.
Why is diamond grinding better than acid etching?
Diamond grinding mechanically opens the concrete pores and creates a consistent, controllable surface profile across the whole slab, removing laitance, old coatings and contamination. Acid etching is inconsistent, doesn’t remove coatings or oil, leaves residue that can interfere with adhesion, and can’t achieve the same profile. We diamond-grind every floor.
What is concrete moisture testing and why does it matter?
Concrete holds and transmits moisture. If moisture vapour is moving up through the slab faster than the coating can tolerate, it pushes the coating off the surface, causing blistering and delamination. We test moisture so we can specify the right primer or moisture-mitigation system — skipping this is a common cause of failure.
What does CSP 2–3 mean?
CSP stands for Concrete Surface Profile, an industry scale (CSP 1 to 10) describing how rough the prepared surface is. Most thin to medium-build coatings need CSP 2–3 — a profile similar to fine sandpaper — to key in properly. Too smooth and the coating won’t grip; the correct profile is part of getting preparation right.
Can you fix cracks and damaged concrete before coating?
Yes. Cracks are routed out and filled with structural epoxy or polyurea, pitting and spalling are repaired, and worn areas can be rebuilt with epoxy mortar before coating. The only time we raise a concern is when cracking signals structural slab movement — we’ll tell you honestly rather than coat over a problem.
Why is primer not optional?
Primer penetrates and seals the prepared concrete and creates the chemical and mechanical link between the slab and the build coats. Without it, the topcoats have far less to bond to and are much more likely to fail. It’s a small step that makes a large difference to longevity, so we never skip it.
Want a Floor That’s Built to Last?
Book a free, no-obligation on-site quote. We’ll assess your concrete, recommend the right system, and give you a written fixed price — backed by a 10-year warranty.