Help Centre

Real answers to real questions -- search or browse by category below.

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

Concrete Driveways

Can a concrete driveway be poured over an old one?

Sometimes, but it depends entirely on your existing driveway's condition — this isn't a default recommendation, since pouring new concrete over a…

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Concrete Driveways

How wide should a concrete driveway be for one car?

A single-car driveway is commonly around 3 to 3.3 metres wide, giving comfortable clearance for opening doors and manoeuvring, though the exact…

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Waffle Slabs

Is a waffle slab suitable for reactive clay soil?

Yes — waffle slabs are specifically designed for reactive clay soil, and are one of the most common foundation systems used across…

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Waffle Slabs

Why are waffle pods used in a waffle slab?

Waffle pods are lightweight void-forming units placed in a grid beneath a waffle slab, creating a ribbed structure of concrete beams running…

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Raft Slabs

Is a raft slab more expensive than a waffle slab?

There's no fixed answer — cost comparison between raft and waffle slabs depends heavily on your specific site's soil classification and size,…

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Raft Slabs

What soil conditions require a raft slab?

A raft slab is generally suited to sites with more stable, less reactive soil — where a single thickened, well-reinforced slab can…

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House Slabs

Does a new house slab need council approval?

A new house slab needs a building permit, which in Victoria is issued by a registered building surveyor — not directly by…

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House Slabs

What’s the difference between a house slab and a standard concrete slab?

A house slab is a genuinely different proposition to a standard concrete slab, even though both are technically "concrete slabs." A house…

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House Slabs

Do I need a soil report before building a house slab?

Yes. A soil report is a required, essential first step before any residential house slab is designed in Victoria — it's not…

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Frequently Asked Questions

Is the Help Centre the same as your blog?

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