Run a finger along a sheet on the sunny side of an older Colorbond roof and it often comes away white, like chalk off a blackboard. Step back and the colour looks flat. The north side is paler than the south, and there might be a few orange freckles around the screw heads. Nothing is leaking. It just looks tired, and you're wondering whether to paint it, leave it, or start pricing a new roof.
Painting a Colorbond roof is a perfectly good option in a lot of cases. It is also the wrong answer in a few, and the difference is usually obvious once someone has been up there and had a proper look. Here's how we think it through on metal roofs around Albury and Wodonga.
Colorbond can be repainted, but it isn't a tile job
Colorbond is steel with a protective metal coating and a layer of paint baked on at the factory. That paint is the part that wears. Years of strong sun break it down slowly, which is where the fading and the chalky film come from. On most of the roofs we look at, the steel underneath is still sound when this starts.
Repainting puts a new protective layer over that worn factory finish. The catch is that metal moves. A steel sheet heats up fast on a summer afternoon and cools quickly overnight, expanding and contracting every day. Our hot summers and cold winters make that swing a real factor here. So the coating has to stay flexible enough to move with the sheet without cracking or lifting. A coating designed for concrete tiles isn't made for that and will fail early on steel.
The signs a metal roof is ready for a repaint
These are the things we look for when a homeowner asks whether their roof is due:
- A white, chalky residue that rubs off on your hand
- Patchy colour, usually worst on the sides that cop the afternoon sun
- Light surface rust around screws, cut edges and scratches
- Grime that no longer washes off in the rain
One thing missing from that list is leaks. Paint restores the surface of the sheets, but a leak at a flashing, a ridge, a valley or around a vent pipe is a separate repair. We find and quote those during the same inspection, so they get fixed before any coating goes on.
When paint won't save the roof
Light surface rust can be treated and painted over. Rust that has eaten right through the steel can't. We check closely for pinholes, rust at the overlaps where one sheet sits on the next, and corrosion around screw holes that has spread into the sheet itself.
Paint over that kind of damage and the roof will look good for a while. The rust keeps going underneath. In that situation the honest answer is to replace the affected sheets, and sometimes replacing the roof makes more sense than coating it. We'll tell you which way we'd go and show you the photos that explain why.
Most of a lasting paint job happens before the paint
This one surprises people. The spraying is the quick part. Most of the time on a metal roof goes into preparation, and that is what decides whether the coating lasts or starts peeling within a few seasons.
A proper job starts with an assessment of where the coating has failed, where rust has started and which screws have worked loose. Then the roof is cleaned to strip off dirt, grime and that chalky film. Paint sprayed over chalk sticks to the chalk, not the steel, and comes away with it. Rust spots are treated and loose fasteners are refixed, because a loose screw is a path for water. Only then does the primer go on: a rust inhibiting primer made for metal, followed by a flexible topcoat made for steel roofing. You can see how we handle each of those stages in our metal roof painting and recoating work.
It's also why a roof painted with leftover house paint tends to end up in a sorry state. General exterior wall paint isn't made for a surface that bakes in a January afternoon and then sits through a cold, wet July night. It cracks, peels and washes into the gutters in flakes.
Albury weather decides when we paint, not just how
Every roof coating has conditions it needs to cure properly: a dry surface, temperatures within the manufacturer's range and no rain on the way. Albury Wodonga weather tests both ends of that.
In summer the problem is heat. A steel roof in full sun can get too hot to paint well, and a coating that dries too fast doesn't grip properly. So in the warmer months we work in the cooler morning hours or wait for cloud cover. In winter the problem flips. Cold starts, dew that hangs around for half the morning and wet spells all shorten the working day. In our experience the milder months in between give the longest runs of good painting weather, which is worth knowing if you're flexible on timing.
If your roof feeds a rainwater tank, it needs to be disconnected while the roof is cleaned and painted, and stay that way until the coating has cured. We talk you through that before the job starts, so nothing from the work ends up in your tank.
A new colour is possible, within reason
A repaint doesn't have to match the original colour. A faded cream roof can become a modern grey, or a dark roof can go lighter to take some of the sting out of summer. Lighter colours reflect more heat, darker ones hide dust and fading better, and your gutters, fascias and walls all need to sit well with whatever you choose. Our guide to picking a roof colour for Albury's summers covers those tradeoffs in more detail.
If you live in one of the newer estates in Thurgoona, Baranduda or Leneva, check whether your estate has design guidelines on roof colours before you settle on something bold. Most people never look, and it's far easier to check now than after the roof is painted.
What moves the price on a metal roof repaint
We don't publish set prices for metal roof painting, because two roofs on the same street can need very different amounts of work. The main things that move a quote are the size of the roof, how steep it is, how easy it is to get onto, the profile of the sheeting and how much rust treatment and fastener work it needs. A single storey home with a low pitch and light chalking is a very different job to a steep two storey roof with rust along the laps.
That's why we inspect first, take photos of what we find and then give you a fixed written quote. Our coating work carries a 15-year double-backed warranty on materials and workmanship.
Chalky, faded or rusting? Find out which before you decide
If your Colorbond roof is starting to look its age, the most useful thing to know is whether you're dealing with a worn finish or something deeper. Call us on (02) 6084 7048, Monday to Friday 8:00am to 5:00pm and Saturday 8:00am to 12:00pm, and we'll inspect the roof and tell you straight whether it's a good candidate for a repaint. You can also read more about how we recoat steel roofs across Albury and Wodonga before you call.