Polished concrete floor in a Brisbane commercial boardroom fit-out by OzGrind
For Builders & Specifiers

Builder Resources

Everything you need before the slab is poured, through construction and at handover of a polished concrete floor. The same guides, checklists and care instructions we give our clients, concreters and project managers on every project.

QBCC Licence 1272897
Trusted by Leading Builders
15+ Years
5,000+ Projects
250+ Google Reviews

Most Problems Start Before We Arrive

Most polished concrete problems are not caused during polishing. They are set long before, in the mix, the slab finish, the curing, the protection and the construction sequence. Get those right and the floor looks after itself. The resources below are built to help you avoid delays, defects and expensive rectification.

Unwanted aggregate showing from the wrong mix, Brisbane
Surface cracking and shrinkage in the slab, Brisbane
Scratches and staining from poor floor protection, Brisbane

You can avoid every one of these. Follow the checklists and guides below before your slab is poured and you sidestep the mix, curing, protection and sequencing mistakes that cause them. Two minutes now saves days of rectification later.

Get the Guides ↓

Grab What You Need

Builders Polished Concrete Checklist
Print this before every polished concrete project.
Builders Polished Concrete FAQs
The questions we answer every week.
Polished Concrete Slab Pour Instructions
Concrete strengths, finishing, curing and best practice.
Polished Concrete Nil Stone Exposure Pour Instructions
Everything your concreter needs to know.
Polished Concrete Mistakes Guide
Five expensive mistakes and how to avoid them.
Slip Rating Guide for Pedestrian Floors
P & R slip ratings by area for compliant floors.

Before You Pour the Slab

The questions builders ask us most, all answered in the guides above.

What concrete strength to specify
Best concrete mix for polishing
How to achieve nil stone exposure
How flat the slab needs to be
Whether the slab should be vibrated
How long to cure before polishing
When to book the polishing contractor
Whether it can be polished upstairs
What causes aggregate to appear
How to minimise cracking
Fresh concrete slab specified and finished for polishing, Brisbane
Breathable protection board taped down over a polished floor during construction, Brisbane

Protect the Finished Floor

A polished concrete floor is the finished floor, not something covered later, so protecting the slab during construction is critical.

Best stage of construction to polish
Trade sequencing
Protecting polished concrete from damage
Breathable floor protection products
Preventing scratches and contamination
Moisture considerations
Access for polishing equipment
Common builder mistakes to avoid

Hand Over the Right Care Guide

Before handover, make sure your client gets the correct care information. Each system has different maintenance requirements, curing times and cleaning recommendations. Send them the matching guide, or download the PDF.

View all care guides →

Talk to Us Before the Pour

Custom home, architect-designed residence, warehouse, retail tenancy or commercial development, involving your polished concrete contractor early usually means a better floor. We are happy to review plans, discuss slab requirements, recommend the right mix and explain aggregate exposure options before the slab is poured. A quick conversation at planning stage is the easiest way to avoid unnecessary cost later.

OzGrind reviewing slab plans with a builder on site, Brisbane

Does Your Client Want a Particular Look?

Polished, honed or epoxy, it is important to lock the exact finish down before the slab is poured. Point your client to the right finishes below, or send them into our Eagle Farm showroom to choose the exact look they want.

Trusted by leading builders, brands & institutions
Stockland Hutchinson Builders Suncorp Stadium John Holland University of Queensland Multiplex Brisbane City Council Metricon City of Gold Coast Boral Woolworths Frasers Property Toyota

Questions Builders Ask Us Most

How soon after the slab is poured can you grind and polish?

Standard concrete needs about 28 days to cure. If the program is tight, we can apply a quick-cure system on the day the slab is poured and start grinding in 7 to 10 days.

What stage of the build do you polish?

Either at open stage with a protective coating over the floor, or after lock-up once the building is watertight, before plaster, skirting and cabinetry go in.

What concrete mix should we specify?

32MPa with 10mm aggregate at 80mm slump (32/10/80) for minimum, random or full stone exposure, and 40MPa for nil exposure. Always fresh water, never recycled. Our new-slab guide sets it all out for your concreter.

How do we achieve nil stone exposure?

It needs the right mix, a tight steel-trowel finish and careful curing. We supply a dedicated nil-exposure slab guide for your concreter to follow.

How do we protect the floor during construction?

A polished floor is the finished floor. Use a breathable protection board taped to itself or the frames, never to the floor, plus a removable coating where needed.

Can polished concrete go in wet areas?

Yes. We use grind and seal with a non-slip additive and set out the waterproofing sequence of rebate, membrane, then hone or polish after curing. Confirm the detail with your certifier.

Can you polish room by room after handover?

No. Polishing runs across the whole floor in steps and needs full, clear access. Hand tools only reach within a few millimetres of edges, so we finish before handover, not after.

Why do quotes vary so much between contractors?

Often a cheaper grind and seal is quoted at a mechanically polished price. Inexperience shows up later as rectification the builder wears. Ask exactly which system and finish is included.

See all builder FAQs →
OzGrind Pre-Start Guide cover, polished concrete process and disclaimer document for builders

The Pre-Start Guide

Everything your client should know before we arrive: booking windows, courtesy calls, payment, additional costs, what happens during the works, and after completion. Share it so the project runs smoothly from day one.

Project Disclaimers

Our service disclaimers explain what to expect from a natural product like concrete, so your clients know the possible outcomes up front. Each one will be available here to read and download.

Indoor polished concrete floor in a Brisbane home by OzGrind

Request Your Free Builder Enquiry Quote

Tell us about your space and whether your slab is new or existing. We will come back within 48 hours with honest advice and a no-obligation quote.

Get a Free Quote

Free, no obligation. We reply within 48 hours.

We'll respond within 48 hours. No obligation, ever.

Call UsGet a Quote