Geostone exposed aggregate floating steps completed by Harbourline Group in Baulkham Hills NSW

Geostone Approved Installer, Sydney

Harbourline Group is an approved installer of Geostone Holcim, laying and finishing exposed aggregate concrete to the manufacturer's standard across Sydney.

Approved installer

Accredited to prepare, lay, compact, finish and expose Geostone Holcim to the manufacturer's standard.

10+ years in Sydney

A decade of decorative and exposed aggregate work across residential and commercial properties.

Verified profile

Listed on the official Geostone installer directory, so you can check our accreditation directly.

View our official Geostone profile

Geostone exposed aggregate driveway completed by Harbourline Group in Kellyville NSW

How we install it

The Geostone process

As an approved installer, we follow the manufacturer's method from preparation through to the exposed finish.

1. Prepare

We prepare the area where your Geostone concrete is to be placed, getting the base and levels right.

2. Lay & compact

We lay, spread and compact the concrete to the correct levels and falls.

3. Finish & expose

We finish the concrete and expose the stone in the product to the manufacturer's standard.

4. Seal

We seal the finished surface so the colour lasts and it stays easy to maintain.

Recent work

Geostone jobs we've completed

A few of the exposed aggregate projects we've installed across Sydney.

Geostone Exposed Aggregate Floating Steps in Baulkham Hills, NSW

Common questions

Geostone questions

01What does an approved Geostone installer do?

We prepare the area, then lay, spread, compact and finish the concrete, including exposing the stone in the product, all to the Geostone Holcim manufacturer's standard so the finish looks right and lasts.

02Where can I check your Geostone accreditation?

You can view our listing on the official Geostone installer directory. The link is on this page.

03Is Geostone exposed aggregate slippery?

No. The exposed stones give it natural grip, which is why it suits driveways, paths and pool surrounds. A penetrating sealer keeps it looking good without making it slick.

04Where can Geostone be used?

Driveways, paths, pool surrounds, backyards, benchtops and architectural steps. We'll walk you through the stone and colour options for your project.

Get a free quote

Let’s turn your vision into reality!

At Harbourline Group, we stay in constant communication with our customers until the job is done. To get a free quote, or if you have questions or special requests, just drop us a line.

Get a Free Quote

Geostone Approved Installer, Sydney

The Geostone process

1. Prepare

2. Lay & compact

3. Finish & expose

4. Seal

Geostone jobs we've completed

Geostone Exposed Aggregate Floating Steps, Baulkham Hills

Geostone Exposed Aggregate Backyard and Benchtop, Burraneer

Geostone Exposed Aggregate Driveway and Council Crossover, Campbelltown

Geostone Exposed Aggregate Driveway, Fairlight

Geostone Exposed Aggregate Driveway, Kellyville

Geostone Exposed Aggregate Pool Surround, Voyager Point

Geostone questions

Let’s turn your vision into reality!

What kind of work do you need?

Thanks, got it!