Concrete Tile Roof Painting in Auckland: When Paint Works and When It Doesn’t

Quick answer: Concrete tile roof painting in Auckland refreshes colour on sound tiles if the growth is killed, the roof washed, bare tile sealed and two topcoats applied, but it won’t fix cracked tiles, failed pointing or a leak.

Monier, which makes concrete roof tiles for New Zealand homes, says something about concrete tile roof painting that restoration ads tend to skip. Repainting refreshes the tiles’ appearance, its roof cleaning and maintenance page says, but “repainting does not improve waterproofing”, and the look needs redoing every five years or so. That’s the tile maker talking, not a painter trying to talk you out of a job.

Resene is just as frank. Its Painting roofs notes, an edited version of the training notes it gives its own staff, say concrete tiles “are usually left unpainted” and that “other than for cosmetic reasons there is no reason to paint them.” The same list adds that cleaning down and applying Resene Concrete Stain “is often the best option to add colour back to concrete tiles”. The Concrete Stain data sheet describes it as a penetrating stain designed for concrete and other cementitious surfaces, with tile among its typical uses.

None of that makes painting a tile roof a waste of money, because cosmetic reasons are real ones. A faded, chalky, lichen-spotted roof on a 1970s brick-and-tile in Forrest Hill or Pakuranga can come back evenly coloured, with a sealed surface in place of bare, thirsty concrete. What you get depends on what’s under the old coating, and on whether whoever quotes the job tells you plainly which kind of roof you’ve got.

The tile and paint makers have put a fair bit of this in writing. Resene, Dulux and Monier each say what paint will and won’t do on a concrete tile roof, and Resene and Monier part ways on pressure washing. Put their positions side by side and you can tell a tired coating from a tired tile, and read a quote properly.

One thing upfront. Replacing tiles, re-bedding ridge caps and re-pointing are roofing work, and we treat them that way at Superior Painters. If your roof needs that work, we’ll tell you at the quote, the roofer goes first, and the paint goes on a roof that’s been made sound. Paint over a cracked tile is still a cracked tile.

What Concrete Tile Roof Painting Does, and What It Can’t Do

On the 1970s brick-and-tile streets of Howick and Takapuna, a tile repaint usually comes up for one of three reasons: the colour has gone, the roof looks grubby with lichen, or there’s a stain on a ceiling and someone has suggested a coat of paint will seal it. The first two are good reasons to paint a tile roof. The third isn’t, and the paint makers say so themselves.

Where the makers say leaks come from

Monier’s maintenance page is short and blunt about what keeps water out. It names blocked gutters, downpipes and valleys as common sources of leaks, and tells owners to clean them annually at a minimum. It describes the bedding (the mortar holding the ridge caps) and the pointing (the top layer sealing the joints) as the parts that crack and loosen with weather. Read together, a tile roof stays dry because the tiles are sound, the ridges are bedded and pointed, and the water has somewhere to go. Paint sits on top of all that, not instead of it.

Resene, which makes Summit Roof, comes at it from a slightly different angle. Its Tech Experts team answered exactly this question from an owner whose builders had suggested just painting over the tiles to seal a leaking roof. Resene’s answer: painting roof tiles “can assist with weathertightness but if the source of the leak is not repaired, leaks will still occur as paint is vapour permeable.”

So the two makers differ on whether paint helps weathertightness at all, but they agree on the part that matters to you: neither says a coat of paint fixes a leak. Resene’s advice to another owner, whose painted decorative tiles had started flaking within about ten years, explains why paint struggles on a roof that’s taking on water. Moisture getting in between the tiles, or through worn glaze, “slowly pushes paint off from the inside out.”

The guarantee detail almost nobody reads

Dulux sells Roof & Trim, a self-priming 100 percent acrylic roof paint, and its Roof & Trim Semi Gloss product page lists concrete tiles among the surfaces it’s recommended for. The same page carries a 15-year guarantee that the paint won’t peel, flake or blister on metal roofs, timber and masonry. Read the conditions, though, and that guarantee “does not cover paint failure caused by any breakdown of coatings applied previously or when used on concrete tiles and plastics.”

Dulux doesn’t print a concrete tile preparation method on that page either; it tells you to ring Dulux Customer Service for it. Resene does much the same. The Summit Roof data sheet says to contact Resene Technical Services for advice before painting new and weathered cementitious surfaces, and lists “cementitious roofing” against that instruction instead of naming a primer. Both companies make paint for concrete tile, and both send the tile-specific question back to their own technical people. We read that as a fair hint that the answer depends on the tile in front of you.

🎨 Painting tip: If a tile roof quote leans on a long paint warranty, ask who gives it and whether it covers concrete tile in writing. A warranty that excludes your roof type isn’t worth much on your roof.

What you’re actually paying for

You’re paying for a fresh, even colour, a bare tile surface that’s been sealed to even out its porosity, and time before the next maintenance cycle. Resene’s Sureseal data sheet describes the sealer it specifies on bare concrete tile as a penetrating sealer able to bond “old decaying surfaces and make them suitable for painting.” That sealing step, followed by two topcoats, is the real value in the job. The colour is what you see; the sealed surface is what you’re buying.

Concrete tile is one of the roof types covered by the roof painting service we run across Auckland, where each surface gets its own prep and coating. Most of what decides whether a tile repaint holds up happens before any paint goes on, starting with what the tiles themselves are telling you.

Repaint or Replace? Reading Your Concrete Tiles First

Every tile roof we’re asked to price falls somewhere between two ends. At one end the coating is tired but the tiles are sound; at the other the tiles themselves are failing, and no paint system changes that. You only find out properly which end yours sits at once the roof is clean, but you can make a good start from the ground.

First, make sure it’s concrete tile

Not every grey, textured roof is concrete tile. Resene’s roof guidance warns that before 1983 most fibrous cement used in New Zealand contained asbestos, including corrugated roofing such as Super 6, and that unless its age can be established beyond doubt you should assume it does. Resene also flags that some bitumen-based coatings on pressed-metal tiles made before the early 1980s, Decramastic among them, may contain asbestos. Either of those is a specialist conversation before it’s a painting one, and a different job from the concrete tile repaint covered here.

Tired coating or tired tile?

You don’t need to climb up to start. Monier warns that walking on roofs can be dangerous and may result in injury, damage or void warranties, so look from the ground, or from an upstairs window with a pair of binoculars:

• Colour and chalk: is the roof faded, patchy or chalky on the north and west faces compared with the sheltered ones?
• Growth: where are the lichen and moss heaviest? On a Takapuna or Albany brick-and-tile, the shaded faces and anything under trees usually carry the most.
• Tiles: can you see cracked, slipped or missing tiles, or tiles with crumbling edges?
• Ridges: are the ridge caps sitting in a straight line, with the mortar along them intact?
• Water: any ceiling stains, damp smells in the roof space, or gutters and valleys full of debris?

If the answers are mostly about colour and growth, you’re looking at a paint job. If they’re about tiles, ridges and water, read the rest of this section before you ring anyone.

A tired coating looks bad and is usually fine underneath. Faded colour, a chalky surface that comes off on your fingers, lichen rosettes and moss in the laps are all signs of a coating that has done its job and worn out. That’s the roof a repaint is for. A tired tile is a different problem: cracks through the tile, broken corners, slipped or missing tiles and edges that crumble when touched mean the tile itself is failing. A few cracked tiles on an otherwise sound roof are a normal pre-paint repair. Cracks across many bays are a sign the roof is near the end of its life.

Some roofs show a whitish-grey film instead. Monier says this is natural salts in the concrete rising to the surface, and that it’s temporary and usually disappears naturally, so it isn’t a reason to repaint on its own.

Other damage only shows once the lichen is off. Our own roof cost guide makes the point that cracked tiles often only appear after the wash, so agree the variation process in writing before the job starts. That way a few replacement tiles found on day two are a known line item with a known price, not an argument on the roof.

Porous, chalky and friable tiles

Concrete tiles that have gone without a sound coating for years get thirsty. Resene’s Painting roofs notes say that on weathering they become relatively porous and “readily support moss and mould growth.” That’s why a bare, porous tile needs sealing before topcoats, and why the sealer is the step a cheap quote is most tempted to leave out.

There’s a point where porous becomes friable, which means the surface has lost its cohesion and starts to crumble. Resene’s Tech Experts answered an owner with exactly that: 50-year-old tiles never recoated, the concrete friable after water blasting, but “still strong enough to walk gently on.” Resene recommended the owner’s proposed system: one brushed coat of Sureseal and two brushed coats of Summit Roof. It also offered an alternative, Resene Aquapel water repellent, and the Aquapel data sheet says reapplication is usually needed every three years and that it “will not waterproof against driving rain.”

The brushing matters. The Sureseal data sheet says the sealer can be rolled or sprayed only “providing the surface is in good condition, firm and not crumbling away.” On a soft, powdery tile it goes on by brush so the whole surface gets wetted. Our own guidance on whether to paint or replace an Auckland roof draws the line at tiles that have become extremely porous or pitted and are heavy with absorbed water. Those are past recoating.

Roofer’s work, and when the honest answer is a new roof

Look along the ridge of almost any older Auckland tile roof and you’ll see the mortar line that holds the ridge caps on. When it cracks or loosens, Monier’s advice is that repairs “should always be done by a roofing professional using modern flexible compounds.” That’s a clear handover point. If the ridges need re-bedding or re-pointing, a roofer does it before any wash or paint goes on, and the painter coats over finished, sound work. A painter who rolls topcoat over loose pointing is decorating a defect.

Sometimes the tiles are simply done. BRANZ’s Good Repair Guide on clay and concrete roof tiles says that, as a general rule, clay and concrete tile roofs can be expected to last 50 or 60 years before needing replacement, and that regular checks and proper maintenance are critical to keep the roof sound and the water out. If your tiles are original to a 1970s house, they’re already 47 to 56 years into that span. Widespread cracking, and tiles that crumble and can’t take foot traffic, point to a reroof, not a repaint.

Our sister company Superior Renovations handles reroofing, and its guide to what a full reroof costs in Auckland is the number to put beside a repaint quote before you decide. Add up the roofer’s repairs and the repaint, put that total beside a reroof price, and ask how many years each one buys you. If the repairs keep growing every time someone looks closer, that tells you something too.

Important note: Whether reroofing or roof repair work needs a building consent depends on the work involved, so check with Auckland Council or a Licensed Building Practitioner before it starts.

🎨 Painting tip: Ask your painter to photograph any cracked or slipped tiles they find during the wash, with a note of where each one sits on the roof. The roofer can then go straight to them.

Once the tiles and ridges are sound, the job comes down to preparation.

How a Concrete Tile Roof Is Prepped, Sealed and Painted

Resene’s roof guidance for weathered concrete and terracotta tiles includes a line worth taping to the fridge: removing mould, widespread lichen and moss is “critical to achieving a successful long term decorative paint system.” Every step below follows from that.

Step one: kill the growth, and give it time

Resene’s published sequence for a tile roof repaint starts by raking debris out of the joints and tile overlaps and scraping off large clumps of moss. Then the growth gets killed with chemistry, not just blasted off, because Resene says water blasting “does not kill the spores and they will come back and grow through your paint.”

Two products do two different jobs. Resene Moss & Mould Killer is a hypochlorite (bleach-based) solution that lists tile roofs among its uses, mixed one part to one part water for lichen. Its Moss & Mould Killer data sheet gives a general contact time of two to four hours before rinsing, but Resene’s tile roof advice for that 1:1 lichen spot treatment is to leave it for 48 hours before moving on. Lichen can take several days to treat, and the data sheet says to remove the dead growth once it changes, typically after one to two weeks. Resene Deep Clean is the slow one: you spray it on, don’t rinse it, and its Deep Clean data sheet says it can take up to a week to see any effect. Resene’s roof advice has Deep Clean going on a few weeks before painting starts.

That waiting time is real programme time. A tile roof quote that has the moss treatment, wash and paint all on the same day has skipped the step that stops lichen growing back through the new coating.

Step two: the wash, where the makers disagree

Monier and Resene don’t agree on this one. Monier “strongly advises against the use of pressure washers for roof cleaning” because of the risk of tile damage. Resene’s tile roof sequence says to “waterblast at the maximum pressure that will not damage tiles” and that care is needed not to waterblast under the tiles, and the Sureseal data sheet calls waterblasting the best preparation for weathered cementitious surfaces.

Both are right about their own concern. Monier is protecting the tile and the laps; Resene is after a clean, sound surface for its coating to bond to. Our way through is to match the pressure to the tile in front of us: firm tiles can take a proper clean, soft or friable tiles get less pressure and more chemistry, and nobody points a jet up under the overlaps, where water can get past the tile. It’s the same thinking behind choosing between a soft wash and a water blaster on the walls below.

Steps three and four: seal the bare tile, then two topcoats

The sealer decision depends on what the wash leaves behind. Resene’s advice on tile roofs is a saturation coat of solventborne Sureseal on bare tiles, while existing paint in sound condition “is a good base” for Summit Roof with no sealer or primer under it. On a roof that’s half bare and half sound old paint, the sealer goes on the bare half.

The Sureseal data sheet adds three details a good painter works to. It must not be applied to wet or damp surfaces, it’s best applied by brush for full surface wetting, and it isn’t part of the film build of the coats that follow. In other words, the sealer conditions the tile; it doesn’t count as one of your paint coats. Coverage runs up to 16 square metres per litre depending on porosity, so a thirsty roof drinks more.

That dry-surface rule meets a clock on a roof near the sea. Resene’s answer for a coastal concrete tile roof has it waterblasted and left to dry thoroughly, then says it’s best not to leave the roof more than a day or so once it’s clean, to minimise salt contamination. On a roof in Bucklands Beach, Devonport or St Heliers the gap is narrow: dry enough to seal, but not so long that windblown salt settles back on.

Decorative glazed tiles are the exception. For tiles where some glaze is left, Resene now recommends ConcreteSeal 3 in 1 because it adheres better to glazed areas than Sureseal does. Its ConcreteSeal 3 in 1 data sheet says it isn’t designed to give long-term exterior protection without overcoating, so it’s a primer, not a finish.

Resene Summit Roof is a waterborne acrylic roof paint in a satin finish. Its data sheet says it’s designed for properly prepared metal and cementitious surfaces, applied in two coats, and covers 12 to 14 square metres per litre over a flat, sealed surface. It’s touch dry in 45 minutes at 18°C and recoatable after two hours, depending on film thickness and conditions.

Dulux’s route is different. Roof & Trim is self-priming and its product page calls for three full, even coats. So two honest quotes for the same roof can show different coat counts: they’re following different makers’ systems.

Put those numbers on a real roof. Two coats of Summit Roof over 150 square metres of sealed tile works out at roughly 21 to 25 litres of topcoat before waste, using Resene’s own coverage figures. Sealing all 150 square metres of bare tile with Sureseal takes at least 9 to 10 litres at its best-case coverage, and more on porous tile. If a quote’s product allowance looks a long way under that, ask why.

Protecting your stormwater, gardens and water tank

Roof prep chemicals end up in your gutters. Resene’s data sheets for Deep Clean and Paint Prep and Housewash both say they may kill aquatic life if they reach the stormwater system, and to divert roof run-off to a sewer or other catchment. The Moss & Mould Killer sheet adds: avoid run-off into gardens and lawns, and keep it off glass, aluminium joinery and plants. On a property that drains to a stream or the harbour, that needs a plan before the first spray goes on.

If your house collects rainwater, there’s a second plan. Resene’s tile roof advice has all the downpipes disconnected during the clean, and the Summit Roof data sheet says to keep them disconnected until after the first shower of rain on the new paint before collecting drinking water. Summit Roof itself is listed as suitable for the collection of drinking water once that’s done. The data sheet also recommends lead testing of existing coatings on roofs installed before 1971, or older roofs never stripped of coatings applied before then.

🎨 Painting tip: On tank water? Ask for the gutters to be cleaned out before the downpipes go back on. Resene’s tile roof advice includes that step for homes collecting rainwater.

That leaves cost, timing and who should be up there.

Tile Roof Repaint Costs, Timing and Safety in Auckland

Concrete tile roof painting costs more than painting an iron roof of the same size, and the reason is in everything you’ve just read: more prep, a sealer coat and a longer programme.

What a tile roof repaint costs, and how to compare quotes

These are Superior Painters’ own indicative ranges (excluding GST) for tile and Decramastic roofs, from our full roof painting price breakdown by roof type and size. They’re for a single-storey Auckland home in reasonable condition with a quality two-coat paint system, and they’re a sense-check, not a quote.

On our own price table, tile and Decramastic roofs sit well above iron at every roof size, and the gap is the prep: lichen and moss treatment with time to work, a careful wash and a sealer coat before any colour goes on. For a range on your own roof, use the roof painting calculator above.

Imagine two quotes for the same 150 m² tile roof in Pakuranga, thousands of dollars apart. A quote that leaves out the sealer, runs the moss kill and the paint on the same day, or prices a harness where the pitch calls for edge protection will look cheaper. Before you compare the totals, check that each quote spells out:

• The sealer: named, and whether it goes on the whole roof or bare tile only.
• The topcoat: named, with the number of coats and whose system it follows.
• The growth treatment: which product, and how long it’s left to work before the wash.
• The wash: method and pressure, and a promise not to drive water under the laps.
• Roofer work: cracked tiles, bedding and pointing on their own line, separate from the painting.
• Access: scaffold, edge protection or roof ladders, matched to your pitch and storeys.
• Water: how run-off is managed, and the downpipe plan if you collect rainwater.
• The warranty: who gives it, and whether it covers concrete tile in writing.

When to paint, and who should be up there

Auckland’s painting window is the drier, warmer months, roughly late spring to early autumn, with winter (June to August) the wet season. Summit Roof’s data sheet says not to apply it below 8°C or when the temperature is liable to drop below 8°C while it dries. A Resene additive extends that down to 3°C, and another protects against light showers, but neither turns a wet roof into a dry one.

Dew is the trap on tile. A roof that’s still wet from overnight dew isn’t ready for sealer, and on a cool autumn morning in Titirangi or Henderson that can push the start to late morning. The Summit Roof data sheet’s spray-grade instructions add the opposite warning: don’t paint a surface too hot to keep your hand on.

Then there’s getting up there safely. WorkSafe’s August 2026 good practice guidelines for working at height are clear: “In New Zealand, there is no minimum height threshold for working at height – any fall risk from any height must be managed.” WorkSafe recommends that any potential fall of more than one metre is managed with physical barriers or a fall restraint.

Pitch changes the kit. Where the roof pitch is greater than 25°, WorkSafe says edge protection should be system-rated and fitted with infill panels, and roof ladders should be used; on slopes over 35°, edge protection should be designed specifically. Add Monier’s warning about walking on tiles, and you can see why a tile roof isn’t a weekend job with a borrowed ladder.

Keeping a painted tile roof looking right

A painted tile roof also comes with upkeep. Asked how to make a roof’s paint colour last longer, Resene’s Tech Experts said roofs “should ideally be washed at least annually to keep the paintwork in good condition.” Where yearly washing isn’t going to happen, Resene’s suggestion is a colour that shows chalking less. For ongoing moss control after a repaint, Resene told the owner with the flaking decorative tiles that spraying Deep Clean twice a year is a good option, left on to do its work. So ask yourself whether the roof will actually get washed every year, and be honest about the answer before you choose a colour.

🎨 Painting tip: On tank water, plan the yearly wash with the downpipes off. Resene’s advice on roof chalking and water tanks is to disconnect the downpipes and wash the roof once a year.

How we run a tile roof repaint

Every Superior Painters job has a dedicated project manager who, our process page says, is on site each day and acts as the quality assurance manager for the team. We use our 97-point quality checklist at every stage of the process, and the finish is backed by our Picture Perfect guarantee, our promise of a “magazine worthy” result. The page that sets out that guarantee also notes that 93% of our work comes from referrals from previous clients.

It starts with a visit, not a phone price. When you book a consultation, a painting consultant comes to your home, measures up and assesses the preparation and repair work needed before painting, and you get a detailed proposal with the costs and the timeline for prep and painting. If you’re changing the roof colour as well, our free colour consultation (available in selected areas) helps match it to the walls, trims and joinery so the roof doesn’t end up fighting the rest of the house.

Concrete tile roofs turn up right across the city, but the 1970s and 80s brick-and-tile streets of the North Shore and East Auckland carry a lot of them. Whether you’re in Howick, Pakuranga, Takapuna or anywhere else in Auckland, ring 0800 199 888 and we’ll book a free on-site appraisal to tell you which end of the scale your roof sits at.

Start With the Tiles, Not the Colour

The colour chart is the fun part, and it’s the last decision that matters. Kill the growth properly, seal what’s bare, put two good topcoats on sound tiles and keep up the yearly wash. Skip any of those and the best paint in the shop is decoration on a problem. Book an appraisal, ask what’s under the coating, and decide from there.

➡ Book a free consultation with Superior Painters
➡ See our before and after painting transformations
➡ See the roof types we paint across Auckland

Related guides

• Picking the right weather window for exterior painting in Auckland
• Choosing house colours that work with your roof

WRITTEN BY SUPERIOR PAINTERS

Superior Painters is Auckland’s trusted house painting and commercial painting specialist. We offer interior painting, exterior painting, roof painting, plastering, wood staining, and house washing — with a dedicated project manager for every job and a free colour consultation service (selected areas). 100% NZ owned. Auckland-wide coverage.

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References

1. Monier NZ, Roof Cleaning and Maintenance
2. Resene, How to Paint and Coat Roofs: Q&As
3. Resene, Popular Paint Systems: Painting roofs (edited staff training notes)
4. Resene, Concrete Stain data sheet D58
5. Resene, Summit Roof data sheet D315S
6. Resene, Sureseal data sheet D42
7. Resene, Moss & Mould Killer data sheet D80
8. Resene, Deep Clean data sheet D815
9. Resene, Paint Prep and Housewash data sheet D812
10. Resene, ConcreteSeal 3 in 1 data sheet D409
11. Resene, Aquapel data sheet D65
12. Dulux NZ, Roof & Trim Semi Gloss
13. BRANZ, Good Repair Guide: Clay and concrete roof tiles
14. WorkSafe New Zealand, Working at height in New Zealand: good practice guidelines (August 2026)