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Design your perfect concrete finish

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Add an extra dimension to precast and tilt slab panels with colour. The Peter Fell System is used for coloured wall projects throughout New Zealand.

Note there is usually variations in the colour within and between panels. Panels are usually poured on different days and so colour variances are likely and colouring needs to be designed to take this variance into account. Within panels there is a usually a natural patina or mottliness and this will be highlighted and extended with the use of colour.

Precast and Tilt slab

Precast and Tilt slab Panels have two surfaces, the mould side and the open side, so when designing your surface you must understand the manufacturing process to know which is which, then specify the appropriate treatment.

Cast in-situ walls

The appearance of these walls depends entirely on the formwork used - for finishes other than off standard shutters it is best to talk with a contractor.

Block walls

Block walls are often plastered and our colours can be used in plaster.

We do not recommend any of our sealers are used on plain or honed block walls.


The building code was revised on Feb 14, 2014 and now states that, essentially, 30MPa is all you need for weathertight precast concrete walls (no coatings required). Cited by the New Zealand Building Code as Acceptable Solution 3 for Clause E2 External Moisture (E2/AS3), the document CP 01:2014 - Code of Practice for Weathertight Concrete and Concrete Masonry Construction, includes the revised section 4.5 which states: "Weathertight concrete shall:

a) Have a minimum specified 28 day concrete strength of 30 MPa,

b) Have a water/cementitious (w/c) ratio (by weight) no greater than 0.50"

There are some other conditions requiring well finished concrete without cracks, and for precast to be designed to ensure no cracks during lifting, as would be expected. But overall this simplifies a great deal of issues and makes concrete walls even more attractive.

See more and download your own copy from the CCANZ website


Pinterest? Yes, we have many wall project ideas on Pinterest:

Cost? Precast and tilt-slab walls typically have high cement contents and are thicker than normal slabs requiring of larger than usual doses of colour.

How does it coloured? We use a liquid system with a high dose of Bayferrox iron oxide pigments giving the richest, most consistent and durable colour on the market in NZ. Don't be fooled by cheap imitations - you get what you pay for.

Will it fade? See our full discussion on why your coloured concrete should last for many years.