Coloursteel colours: what looks great in 5 years, not just on day 1

Every Coloursteel colour looks good in the sample chip. The question is which ones still look good five winters later, after the BoP sun, salt, and humidity have all had a go. Here is what we have seen across nearly two decades of installs in the Bay.

Why colour matters more than people think

Coloursteel is two things stacked together. Underneath is the Galvalume or Zincalume steel, which does the structural and weatherproofing job. On top is a baked-on paint film that does two jobs: looks nice, and protects the steel from UV.

When a Coloursteel roof "fails" it is almost always the paint film going first. UV breaks the binders down, the colour chalks, the surface becomes porous, and salt and acid rain start working on the steel underneath. A roof that should have lasted 35 years can be tired at 22 if the colour was the wrong choice for the climate.

Choosing well means choosing for the conditions, not just the catalogue.

The four most-installed colours in BoP

FlaxPod (deep olive-green)

The unofficial standard colour of the Bay. Sits between trees and sky better than anything else. Ages beautifully because the deep olive masks any minor chalking, and the green tones blend into the bush backdrop most BoP suburbs have.

Best for: Bush-edge sections, anything in the lake suburbs, character homes, anything you do not want to think about for 30 years.

Watch out for: Looks slightly different in cloud vs sun. The sample chip in the showroom is closer to the cloudy version.

5-year verdict: A FlaxPod roof from 2021 still looks like a 2021 roof. Almost no visible weathering.

Ironsand (dark warm grey, almost black)

The "modern build" default. Pairs with cedar, plaster, dark joinery, and modern landscaping. Has had its moment for a decade and is not going anywhere. About 40% of our new builds in the last two years.

Best for: Architect-designed builds, urban infill, two-storey homes, anything where you want a strong roof line.

Watch out for: Dark roofs are hot. Your roof space will run 10 to 15 degrees warmer than a light-coloured roof in summer. Make sure your insulation is up to spec or you will notice it in the bedrooms above.

5-year verdict: Holds the colour brilliantly. The newer Maxx-grade Ironsand we are installing now (PVDF coating) shows almost no chalking even on west-facing sections.

Karaka (very dark brownish-green)

Bridges the gap between FlaxPod and Ironsand. Reads as "black" from a distance but is actually a deep brown-green up close. Works in both bush and modern contexts.

Best for: Homes that want a contemporary feel but are nestled in greenery. A lot of our Mount and Bethlehem two-storey work goes Karaka.

Watch out for: Same heat issue as Ironsand. Look at insulation.

5-year verdict: Excellent. The dark depth means any minor chalking is invisible.

Sandstone Grey (light warm grey)

The "I want a roof that does not shout" choice. Reflects heat much better than the darks. Common on rural-style homes, lifestyle blocks, and anything coastal where you want a softer feel.

Best for: Coastal homes (it reflects salt damage better visually), lifestyle properties, anything where the cladding is the hero and the roof should recede.

Watch out for: Light colours show every bit of lichen, moss, and bird mess. You will need to soft-wash every 3 to 5 years to keep it looking sharp.

5-year verdict: Looks good if maintained. If you let the lichen go, it streaks badly by year 4.

Coloursteel coating grades — the bit nobody explains

This is where money is well spent or wasted. Coloursteel comes in three coating grades, each with different durability:

• Standard Coloursteel: Polyester-based paint. Fine for most inland BoP homes. 10 to 20 year warranty.
• Coloursteel Endura: Higher-grade polyester. Recommended for marine or industrial environments. 20 to 25 year warranty.
• Coloursteel Maxx: PVDF-based topcoat. The Cadillac. Used on coastal homes and where you want the colour to hold for 30+ years with minimum maintenance. About 8 to 12% more in material cost but stays vibrant much longer.

If you are within ~3km of the coast, we always quote Maxx. The salt air strips standard paint film about 30% faster, and the extra material cost is paid back in not needing to recoat at year 22.

Sun-side vs shade-side

One thing people do not factor in: the north and west faces of your roof will fade about 15 to 20% faster than the south face. If you pick a strong colour that depends on its richness (anything red, blue, or very dark), you will see a visible difference on the two halves of the ridge after about 12 years.

Greens, browns, and greys hide this much better than reds and blues. That is partly why FlaxPod is so popular in NZ.

Colours we generally talk people out of

Not because they are bad, but because they need more thinking than people realise:

• Pioneer Red. Beautiful when it is new. Fades faster than any other colour. By year 15 you can see the difference between sun and shade faces with the naked eye. Fine if you love it, but go in with eyes open.
• Lichen. Such a specific pale-green that it dates to a particular era. If you are doing a heritage restoration, perfect. Otherwise it can age the house.
• Permanent Green. A great colour, but reads as quite saturated. Works on certain houses (think kiwi cottage with white weatherboards) and looks wrong on others. Always ask for a sample on-site, not just the chip.

How to actually decide

1. Walk your street. Look at the roofs that have been there 10+ years. The ones still looking good are the colours that suit your conditions.
2. Get a real sample. Coloursteel will send you A4 sample sheets for free. Put it on the roof of the house (literally up there or pinned to a window). Look at it in morning, midday, and dusk light. The chip in the showroom lies.
3. Consider the cladding. The roof and cladding should harmonise, not compete. Dark roof + dark cladding only works on certain architectures. Dark roof + light cladding is the most forgiving combo.
4. Think about resale. Neutrals (FlaxPod, Ironsand, Karaka, Sandstone Grey) cover 90% of the market. Strong colours can put off some buyers in 10 years.

You can see the full range at colorsteel.co.nz/colours. Or come past the Papamoa workshop and we will have real samples in your hand within five minutes.