Help Centre
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Help Centre
Straight answers to the questions Melbourne homeowners, builders and developers ask most about concrete, excavation, foundations and retaining walls.
Browse 609+ answered questions.
All Questions
How do multi-stage builds schedule concrete pours efficiently?
Effective scheduling generally sequences pours to align with the broader construction program — foundation and slab work early, with subsequent concrete stages…
Read Answer Homeowner GuidesHow involved should I be during my own concrete project?
A genuinely healthy level of involvement means staying informed, asking questions when something isn't clear, and being available for any decisions that…
Read Answer Construction ProcessWho cleans up the site after a concrete project finishes?
A properly professional contractor includes reasonable site clean-up as standard — removing offcuts, excess material, and general work-related mess from your property…
Read Answer Pricing & QuotesAre concrete quotes usually GST inclusive?
This genuinely varies by contractor and how a quote is presented — some quotes are shown GST inclusive, others exclusive with GST…
Read Answer Council RequirementsCan council reject a project after work has already started?
It can happen, though it's uncommon for properly approved, compliant work — this risk is significantly higher where work proceeded without proper…
Read Answer Building PermitsWho actually applies for the building permit, me or the builder?
This varies by project arrangement, but commonly your builder or contractor manages the building permit application on your behalf as part of…
Read Answer EngineeringIs a second engineering opinion worth getting?
For a significant, complex, or unusually costly design, a second opinion can be a genuinely worthwhile investment — engineering, like any professional…
Read Answer Soil ReportsWhat happens if my soil report comes back as Class E?
A Class E classification means highly reactive/extremely reactive soil, one of the more demanding classifications under AS 2870 — it genuinely means…
Read Answer FoundationsCan a foundation be underpinned without demolishing the house?
Yes — underpinning is specifically a technique for strengthening or extending an existing foundation while the structure above remains standing, working beneath…
Read Answer Commercial ConcreteHow is public safety managed during commercial concrete work?
Commercial sites near public areas — footpaths, car parks, occupied buildings — typically use physical barriers, clear signage, and defined pedestrian exclusion…
Read Answer Bored PiersHow many bored piers does a typical house need?
This genuinely varies significantly by project — it depends on your building's size and layout, the loads involved, and your soil report's…
Read Answer Screw PilesDo screw piles need a concrete cap on top?
Not always — many screw pile applications use a steel bracket or connector fitted directly to the pile head to connect to…
Read Answer Retaining WallsWhat happens if a retaining wall isn’t built correctly?
A poorly built or under-engineered retaining wall can genuinely fail — bulging, leaning, or in more serious cases collapsing — particularly under…
Read Answer Soil RemovalIs contaminated soil handled differently during removal?
Yes, genuinely — contaminated soil requires different handling, testing and disposal to a licensed facility equipped for that specific material, rather than…
Read Answer Site CutsDoes every new build need a site cut?
Not necessarily — whether a site cut is needed depends on your existing ground level relative to your building design's required finished…
Read Answer ExcavationHow deep can excavation go without shoring?
There's no single universal depth — it genuinely depends on soil type, moisture conditions, and site-specific factors, assessed properly rather than applied…
Read Answer Plain & Coloured ConcreteDoes coloured concrete cost significantly more than plain?
Coloured concrete carries a real but generally moderate premium over plain concrete, reflecting the oxide colour additive itself and the slightly more…
Read Answer Exposed AggregateIs exposed aggregate suitable for a pool surround?
Yes, genuinely well suited — exposed aggregate's slip-resistant texture is a real practical advantage around a pool, where a wet, smooth surface…
Read Answer Concrete DrivewaysWhat happens if my new driveway doesn’t drain properly?
If a genuinely new driveway isn't draining as it should, this typically points to a design or construction issue — incorrect fall,…
Read Answer Waffle SlabsCan termites be a problem under a waffle slab?
Termite management is a genuine, standard part of compliant slab construction generally, not something unique to waffle slabs specifically — proper termite…
Read Answer Raft SlabsDoes a raft slab need bored piers as well?
Not always — a standard raft slab on genuinely suitable, stable soil can perform adequately on its own. Bored piers are added…
Read Answer House SlabsCan I choose my own foundation system for my house slab?
Not really — your foundation system is determined by your site's soil classification and your building's design loads, assessed by your structural…
Read Answer Builder GuidesWhat should a builder look for in a reliable concrete subcontractor?
Genuine reliability shows up in consistent scheduling, proper documentation (compliance certificates, insurance, engineering sign-offs), and a real track record of quality work…
Read Answer Builder GuidesHow do builders typically coordinate with a concrete subcontractor?
Effective coordination generally involves clear scheduling communication (particularly around weather-sensitive stages), shared access to relevant engineering documentation, and a genuine understanding of…
Read Answer Homeowner GuidesIs it normal to feel unsure during a big concrete project?
Yes, genuinely completely normal — a house slab, driveway, or excavation project is a significant investment and disruption to your property, and…
Read Answer Homeowner GuidesWhat should I ask a contractor before signing a contract?
Worth asking directly: what's specifically included in the price (and what isn't), their genuine experience with projects like yours, how they handle…
Read Answer Construction ProcessHow are delays communicated during a concrete project?
A good contractor communicates delays — whether from weather, site conditions, or scheduling — promptly and clearly, rather than leaving you to…
Read Answer Construction ProcessWhat order do trades work in on a concrete project?
A typical sequence runs: survey and soil testing, then excavation/site preparation, then any plumbing or electrical conduits that need to go in…
Read Answer Council RequirementsCan council fine me for unapproved concrete work?
Yes, potentially — proceeding with work that required approval but didn't obtain it can result in fines, and in some cases a…
Read Answer Council RequirementsDo council requirements vary a lot between suburbs?
Yes, genuinely — while general Victorian building regulations apply statewide, specific requirements around things like vehicle crossings, setbacks, tree protection, and planning…
Read Answer Building PermitsDo small concrete jobs ever need a building permit?
Sometimes, yes — whether a small job needs a permit depends on the specific work and applicable exemption thresholds, not simply the…
Read Answer Building PermitsHow long does a building permit typically take to process?
Timeframes genuinely vary, but a straightforward residential permit application with complete, correct documentation is often processed within a few weeks by your…
Read Answer EngineeringHow much does a structural engineer typically charge?
Engineering fees genuinely vary with project complexity, scope, and the specific engineer or firm — a straightforward standard house slab design costs…
Read Answer EngineeringCan I use my own engineer instead of the builder’s?
Generally yes — you're typically not obligated to use a specific engineer your builder or contractor suggests, and can engage your own…
Read Answer FoundationsCan a foundation be repaired instead of replaced?
Often yes — many foundation issues can be addressed through repair or remediation (underpinning, crack injection, drainage correction) rather than full replacement,…
Read Answer FoundationsWhat are the warning signs of a failing foundation?
Genuine warning signs include cracks that are widening over time (rather than fine, stable, cosmetic cracking), doors and windows that have started…
Read Answer Commercial ConcreteDoes commercial concrete need a specific flatness rating?
Often yes, particularly for warehouse and industrial floors where equipment like forklifts or automated racking systems need a genuinely flat, level surface…
Read Answer Commercial ConcreteHow is commercial concrete different from residential concrete?
Beyond simply being larger, commercial concrete typically involves genuinely higher load requirements (racking, forklift traffic, heavier vehicles), sometimes specific flatness tolerances, and…
Read Answer Soil RemovalHow many truckloads does a typical soil removal job take?
This depends entirely on your project's excavated volume and the truck size used — there's no single standard number, since a small…
Read Answer Soil RemovalWhere does removed soil actually go?
Removed soil is typically taken to a licensed disposal or recycling facility, with the specific destination depending on the soil's classification (clean…
Read Answer Site CutsIs a site cut different to bulk excavation?
A site cut specifically refers to excavation that establishes your building pad at the correct finished level — a targeted, design-driven cut.…
Read Answer Site CutsHow is the depth of a site cut decided?
Site cut depth is determined by comparing your existing ground level to your building design's required finished floor level — the difference…
Read Answer ExcavationIs excavation noisy and how long does it last?
Yes, genuinely — excavation involves machinery, and some noise is an unavoidable, normal part of the work. The actual level and duration…
Read Answer ExcavationCan excavation work damage my neighbour’s property?
It genuinely can, if not properly managed — excavation close to a boundary can affect a neighbouring structure's support, drainage, or ground…
Read Answer Plain & Coloured ConcreteIs plain concrete a good choice for resale value?
Yes, generally — plain concrete is a genuinely safe, broadly appealing choice that suits a wide range of home styles and buyer…
Read Answer Plain & Coloured ConcreteDoes coloured concrete fade over time?
Some gradual fading is genuinely normal over many years, mostly from sustained UV exposure — but well-made coloured concrete, properly sealed, holds…
Read Answer Pricing & QuotesIs a deposit normal when accepting a concrete quote?
Yes, a deposit is standard practice for most concrete and excavation projects — it confirms your commitment to proceed and allows your…
Read Answer Pricing & QuotesWhy do concrete quotes vary so much between contractors?
Significant quote variation usually reflects genuinely different specifications, not just different profit margins — differences in base preparation depth, reinforcement grade, concrete…
Read Answer Soil ReportsWho is legally allowed to prepare a soil report?
A soil report needs to be prepared by a qualified geotechnical engineer or suitably qualified soil testing professional — this is a…
Read Answer Soil ReportsHow long is a soil report valid for?
There's no single fixed expiry date written into legislation, but soil reports are generally considered reliable for a few years, provided ground…
Read Answer Bored PiersHow wide is a typical bored pier hole?
Residential bored piers commonly range from around 300mm to 450mm in diameter, though the genuinely correct diameter for your project is determined…
Read Answer Bored PiersDo bored piers need machinery access to my backyard?
Generally yes — bored piers are drilled using an auger rig, which needs reasonable access to reach the pier locations. The exact…
Read Answer Screw PilesAre screw piles suitable for very wet or boggy ground?
Often yes — screw piles can be a genuinely good option for wet or boggy ground, since they bypass unstable surface soil…
Read Answer Screw PilesHow fast can screw piles be installed?
Screw piles are among the fastest deep foundation methods available — a typical residential job can often be completed within a single…
Read Answer Retaining WallsHow long does a well-built retaining wall last?
A properly designed and constructed retaining wall can genuinely last decades — concrete sleeper systems in particular are built for long-term durability,…
Read Answer Retaining WallsCan a retaining wall be built without an engineer?
For low retaining walls below a specific height threshold (generally around 700mm-1m depending on site conditions and what the wall retains), engineering…
Read Answer Retaining WallsHow close to my boundary can a retaining wall be built?
There's no single fixed distance — this depends on your specific council's requirements, the wall's height, and whether it sits on or…
Read Answer Exposed AggregateCan I choose my own stones for exposed aggregate?
Yes, generally — exposed aggregate finishes offer real choice in aggregate type, colour and size, letting you genuinely tailor the finished look…
Read Answer Exposed AggregateIs exposed aggregate slippery when wet?
No — quite the opposite. Exposed aggregate's textured, stone-studded surface genuinely offers better slip resistance than plain, smooth concrete, both wet and…
Read Answer Concrete DrivewaysDo I need a permit to replace my existing driveway?
It depends on the scope of work. Replacing a driveway within its existing footprint, on an existing crossover, often doesn't require a…
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