The specification behind our quotes

The reference standard

Residential pavement work here takes AS 3727.1 as its reference. On the crossover, Cardinia Shire’s own requirements govern that section, along with the conditions on its road reserve permit; that strip is council territory and gets built the way the shire wants it built.

Reading the ground first

This shire refuses to be one kind of country. Pakenham and Officer sit mostly on clay loam that swells in a wet winter and shrinks over a dry summer, and their estate lots are usually engineered fill over the natural ground, so we excavate to firm material before believing anything. Head south towards Koo Wee Rup and you are on the bed of a drained swamp, deep, dark and soft. Climb towards Beaconsfield Upper and the hills and the problem flips from soft ground to steep ground, table drains and culverts included. The first job at every measure is naming which country we are standing on, because the base design follows from that answer.

Base and preparation

Old surfaces, topsoil, soft spots and anything organic come out before anything goes in. Crushed rock is brought in and compacted where the ground calls for it, deeper where it is weak, and a vapour membrane goes under the slab where conditions require one. On the old swamp country this stage is most of the job, and skipping it is how the district’s wavy shed floors got that way.

Steel

Reinforcing mesh goes into every slab we pour, sitting on bar chairs mid-depth where it can actually restrain cracking. Where cars, utes or machinery will stand, the mesh grade steps up. Steel placed on the ground and poured over is a line on an invoice, not reinforcement, and it is the first thing a cheaper quote quietly deletes.

Thickness by use

Paths run 75mm at minimum, moving to 100mm wherever a vehicle can cross them. Driveways are poured around the 100mm mark in 25 MPa concrete. Garden shed bases get 100mm with SL72 mesh; garage, workshop and machinery shed slabs get 125mm with SL82, with thickened edges and rebates where the shed manufacturer’s drawings ask for them. Dwelling slabs are not quoted through this site.

Joints

Concrete cracks; good concreting decides where. Control joints are sawn while the slab is still young, laid out so the movement lands in straight lines the eye reads as design. Isolation joints keep new work clear of footings, the home's own slab and old concrete, so nothing drags on anything else as the seasons move the ground.

Water and culverts

Falls come off real levels taken at the measure, and no slab we pour drains towards a building. On kerbed estate streets the water goes to the street or a formed drain. On the shire’s unkerbed roads the crossover runs over a culvert, and that pipe has to be the right size, set right and left clear, because the owner is responsible for it and a blocked one turns a driveway into a dam wall. We build crossover and culvert as one piece of work.

The crossover and the shire

Any work between your boundary and the road needs Cardinia Shire’s Works Within a Road Reserve permit before it starts, and the shire will only issue one to a contractor carrying twenty million dollars in public liability insurance, with everything in the reserve reinstated to its prior condition afterwards. We hold that cover and run the permit as part of the job. Permit fees are the council’s own, set each financial year and confirmed with your quote.

Finish and cure

The surface leaves the tools the way you chose it at the measure: broom finished, coloured through, or exposed stone. Then the concrete does the slow part on its own. Typical house-work timings are foot traffic the next day, cars after seven days and heavy vehicles after 28, and the handover sheet states the ones for your slab. Exposed aggregate gets sealed once the concrete has cured properly.

Put this page to work

A cheaper figure almost always lives below the surface: less rock, lighter mesh, thinner concrete. Ask every bidder for those three numbers in writing and read them against this page, the rate card and the calculator. A quote that matches this specification and still beats ours deserves the job; we just do not meet many.