Guides
Everything we know, written down
Including the parts that cost us work. If you read all of these you will be able to brief a contractor properly and tell a real quote from a cheap one — whether or not that contractor is us.
- Fifteen times we'll tell you not to injectThe fifteen situations where crack injection is the wrong repair, what the real problem is in each one, and which trade you should be calling instead.Read it
- Two different trades, one confusing nameResin injection means two unrelated trades in Australia: sealing water paths inside concrete, and injecting the ground under a slab to lift it. This explains which one your problem needs.Read it
- What polyurethane injection is, in plain EnglishA plain-English explanation of what polyurethane crack injection actually is, what happens on site, what the numbers mean, and what every term in the quote translates to.Read it
- Does it actually work, and for how long?An honest account of when injection is a permanent repair, the three ways it fails, and a step-by-step test for working out whether a repair that leaked again was the contractor's fault or a new problem.Read it
- Hydrophilic or hydrophobic: the argument nobody settlesBoth manufacturer camps claim their chemistry is always right, and both are commercially motivated. Here is the honest version, and the single question that actually decides which resin your crack needs.Read it
- What crack injection actually costs in AustraliaA published, itemised price guide for concrete crack injection and leak sealing in Australia, showing the rate card, the reason competing quotes never agree, and three jobs costed line by line.Read it
- Polyurethane or epoxy? It depends on one questionPolyurethane and epoxy injection do completely different jobs, and the choice comes down to whether you have a water problem or a strength problem.Read it
- Should you do this yourself?An honest answer to whether you can inject a concrete crack yourself in Australia: what you genuinely cannot buy, the narrow case where doing it yourself is fine, and the two health hazards that make everything else a licensed job.Read it
- Where negative side sits under Australian standardsA careful account of where sealing from the dry side sits under Australian standards and the National Construction Code, what the QBCC statutory warranties mean for "no warranty" clauses, and the written advice that has to be issued before the work rather than after it.Read it
- How to scope and tender a water ingress repairA scope-of-works template a body corporate committee can copy, plus how to normalise competing quotes, structure the AGM cost paper, and decide when a special levy is actually required.Read it
Send us a photo and we'll tell you what it is
Most leaks can be identified from three photos and a couple of questions. If it needs eyes on it, the site visit is free — and if injection is the wrong fix we'll say so and tell you who to ring instead.
Mon–Fri 07:00–17:00 · we do not advertise 24/7 — here is what actually happens out of hours