Stripping Back 8 Years of Moss & Lichen

This modern, 2-story home is located in the leafy suburb of Titirangi, a beautiful area far from the bustle of the city, but which also has a lot of tree cover and higher than average rainfall, creating the perfect environment for moss and lichen to grow.

The new homeowner contacted us while waiting for the home to go unconditional. The Cedar hadn’t been maintained in 8 years and was looking shabby and discoloured.

Cedar should be treated every 2-3 summers to keep it protected from New Zealand’s harsh UV rays, and to keep it looking cosmetically beautiful.

Without regular maintenance, the UV rays will eventually dry out the timber, leading to fine cracks and roughening of the surface. This creates a toehold for mould, mildew and lichen to get established and makes the timber look unsightly.

As the Cedar was left such a long time, the story of this property can be told in the before and after photos. We don’t usually have such dramatic transformations with most houses we maintain, so it was a real treat to see how beautifully the Cedar tidied up.

Maintenance Timeline

The customer first approached us on the 14th of October, 2020.

16th October, 2020 – Initial onsite assessment completed.
22nd October, 2020 – Quote sent.
26th November, 2020 – Team arrived onsite to start the job.
9th December, 2020 – Job completed.

The job took 72 hours in total: 14 hours to wash and strip the timber in preparation for the coating, and 58 hours to apply the stain. The entire job took 9 days from start to finish.

Cedar Maintenance Process

Cedar that has been sheltered from UV rays has a flat, uniform surface that is straightforward to maintain.

Cedar that has been exposed to high amounts of UV will have broken-down stain or oil still on the surface, which often creates a toehold for organic matter to grow.

The two front faces of this Cedar home demonstrate both situations perfectly.

The sheltered face, next to the front door, has a flat even colour; while the exposed face, above the garage door, has been exposed to the UV rays.

The starting point for both faces is the same: the Cedar is washed using a biodegradable cleaning solution to remove organic matter and any remnants of the broken-down stain.

After the deep clean, the sheltered face was ready to be coated.

The exposed face required a more rigorous cleaning process. The orange colour on the Cedar is mould, an organic growth that washes off quite easily during the deep clean.

The dark brown sections of timber are stain that hasn’t been broken down by the UV and is still in reasonably good condition. To remove this and get the boards back to a natural state, we had to strip the boards.

The stain used on this property is Resene Woodsman Waterbourne, smokey ash colour. This is a very light-coloured stain, one of the lightest on the market, and it leaves the boards looking natural and warm in tone.

Cedar Maintenance Challenges

Soffits keep moisture away from the roof and help prevent wood rot and mould, but they also shelter the Cedar from UV rays. This sounds good in theory, but often makes the Cedar under the soffits darker than the Cedar exposed to the light.

If these areas are not prepared properly, the finished result will look odd as both stain and oil are translucent and will show whatever is on the surface below. Preparation here is key, and it takes experience and expertise to make sure the surface is even before applying the treatment.

This property also had two high faces over 4 meters that required scaffolding. As the ground below is flat, we were able to use our mobile scaffolding which kept access costs down.

Ongoing Maintenance Requirements

Now that the whole house has been restored, it’s only the sun-exposed faces that will need maintaining every 2-3 summers. The rest of the house may not need further maintenance for 5-7 years.

The Final Outcome

Location matters with Cedar. In an area with lots of tree cover and rain, the boards are often in good condition, but covered in lichen, moss and all sorts of organic material, and they are more susceptible to moisture damage.

That’s nothing out of the ordinary, but it does require some extra work if the Cedar is not regularly maintained.

The new homeowners were delighted with the result. Their newly purchased home cleaned up even more stunning than they imagined, especially the front facing areas that people first see when arriving.

This property is an excellent demonstration of how resilient Cedar really is. An amazing timber that will look great for years to come, with a little love and care.

Property Details

Year of Build:

2010s

Location:

Titirangi

Coating:

Resene Woodsman Waterborne

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12 Nov 2025

Townhouse Complex Stripped Back & Rejuvenated

This block of 14 townhouses is located on an elevated section overlooking the beautiful seaside suburb of Mission Bay. The townhouse complex was finished in 2020. After a few years in the sun, the owners started to notice the Cedar looking patchy and uneven.

This block of 14 townhouses is located on an elevated section overlooking the beautiful seaside suburb of Mission Bay.

The townhouses were architecturally designed by Novak + Middleton and built by Gibbons Co. The townhouse exteriors use an eye-catching mix of standing seam metal cladding and Cedar.

The townhouse complex was finished in 2020. After a few years in the sun, the owners started to notice the Cedar looking patchy and uneven.

TimberTech was bought in to assess the Cedar and put a management plan in place to keep it protected – and looking great – for years to come.

Maintenance Timeline

TimberTech was first contacted on the 25th of October, 2024.

1st November, 2024 – Cedar Assessment completed.
25th November, 2024 – Quote sent.
31st July, 2025 – Job started.
29th August, 2025 – Job completed.

As there are 14 houses in the complex, each needing consultation, the time between the different stages of engagement was longer than usual.

After an 8-month consultation period, 12 out of the 14 houses in the complex decided to go ahead with the proposed work.

The job took around 4 weeks in total, with some delays due to inclement weather.

Cedar Assessment

Sometime during the building process, the Cedar was coated with stain. Stains are excellent in areas without direct sunlight, but when exposed to harsh UV they break down, giving a patchy or uneven look.

Unfortunately, the stain used here had broken down, particularly on the exposed northern face.

Our recommendation was to fully strip, sand and recoat the Cedar cladding, converting it from stain to a penetrating oil (in this case, Wood-X).

The stain used on the south face still held up well, and we recommended that another coat of the same stain be used to extend its lifespan.

Cedar Maintenance Process

Stripping stain from Cedar is a laborious task and not something undertaken lightly.

For stripping this particular stain, Resene Sea to Sky Coating Remover has proven very effective. We apply this with a spray machine, making sure all the joinery, doors, flashings and surrounds are masked to keep them protected.

The stripper is left on for a couple of hours to activate and dissolve the stain, then it can be scraped off, followed by a wash to remove any last residues.

For particularly stubborn areas of stain, some sanding may be required. This should be done lightly and kept to a minimum to retain the texture of the board.

Once the stain has been successfully removed, the board is ready for oil to be applied.

When first assessing the job, we knew we needed to match the colour of the oil as closely as possible to the original product. We presented the owners with some colour options and settled on using two colour tints, Flint and Foundry.

The boards were very dry, especially on the northern face, and required two coats in most places. We basically put as much oil into the boards as possible.

Cedar Maintenance Challenges

Some of the more sheltered townhouses had stain that hadn’t fully broken down yet and proved difficult to remove. We had to remask and restrip these areas before we could apply the oil, ensuring an even finish.

The other main challenge was keeping the whole area tidy and minimising the impact on the residents, particularly the owners who were not having any work done. We did our best to minimise any noise, only have essential vehicles in the car park and provide constant communication with all residents.

One of the biggest downsides of moving from stain to oil is a 3-9 month transition period where your Cedar will have a shiny-flat-shiny-flat look.

This happens when oil is applied to any surface that still has stain remnants. The oil cannot soak through the stain as it is non-porous, so it sits on top, around the surface area where the oil has soaked in, giving the shiny-flat-shiny-flat look.

This is all part of the process and not exactly a challenge, but we always take care to prepare the homeowners for the transition period.

Ongoing Maintenance Requirements

When transitioning from stain to oil, we recommend assessing the Cedar again after 3 months to see if any of the boards require additional oil, especially on the sun-exposed faces.

We will then recheck the boards 12-18 months later (depending on the conditions), after which the Cedar will fall into a regular maintenance plan, with exposed faces needing to be recoated every 2-3 summers.

The Final Outcome

The rejuvenated Cedar was transformed from washed-out brown to a lustrous dark chocolate tint. The owners were impressed with the final look and relieved that their Cedar had been returned to the state when they moved in.

By transitioning from stain to oil, they could also look forward to more straightforward and cost-efficient maintenance in the future.

If you would like to know more about the transition process, please read our article Can Cedar Be Transitioned From Stain to Oil?

11 Sep 2025

Cultural Icon Restored to Original Splendour

The ASB theatre has received numerous awards for its design, efficiency, and sustainability. Part of this aesthetic is defined by its impressive Cedar feature walls. See how we returned the dry and weathered Cedar back to its original splendour.

The ASB Waterfront Theatre is a modern, 675 seat performing arts venue and the home of the Auckland Theatre Company.

It has received numerous awards for its design, efficiency, and sustainability, including a 2017 Auckland Architecture Award for Sustainable Architecture.

Built by Hawkins Construction and opened in 2016, the theatre’s aesthetic is defined in part by its impressive Cedar feature walls.

The building has two main Cedar walls high on the west and south faces. There are also Cedar doors at ground level on the west and north sides.

Maintenance Timeline

TimberTech was first contacted on the 3rd of March, 2025.

7th March, 2025 – Cedar Assessment completed.
18th March, 2025 – Quote sent.
19th May, 2025 – Job started.
16th June, 2025 – Job completed.

The job took 3 weeks in total, with some delays due to inclement weather.

We will check the Cedar again in 12 months and advise if further treatment is needed (usually if the timber was particularly dry). Otherwise, the building will move into a standard 10-year maintenance plan.

Cedar Assessment

The Cedar had been oiled previously, probably around the same time as installation 5 years ago, and nothing had been done to maintain it since.

That’s longer than we normally advise and the Cedar was starting to look dry and weathered, particularly on the high, exposed areas of the building.

The western face received the brunt of the afternoon sun, and the tint was starting to wear off unevenly in places, giving the Cedar a patchy look.

The southern face was largely sheltered from the sun and the pigment in the oil hadn’t broken down as much as the western face.

The doors on the west and north sides had also been affected by graffiti and people rubbing up against the boards and required some restoration.

To remediate these, we lightly sanded the Cedar before applying the oil.

Cedar Maintenance Process

No matter the size and scale, the first step in any Cedar maintenance job is to deep clean the timber with a penetrating surfactant and remove any built-up organic matter.

As the building is in the heart of Wynyard Quarter, the timber had been exposed to considerable dust, grime, air pollution, along with wind and salt coming from the ocean.

Before applying the oil, we had to mask the surrounding concrete to make sure the oil didn’t leave any stains.

We colour matched the tint using Wood-X to ensure the colour would match the original look of the building.

To reach the Cedar high on the western face, we used a 15-meter knuckle boom. The southern face was even higher and required an 18-meter scissor lift.

It was only once we got up close to the boards that we saw how dry they were. Cedar will tell you when the pores are full just by looking at the surface. In the end, we used much more oil than we expected.

Cedar Maintenance Challenges

There were two main challenges for this project: traffic management and the height of the building.

The building is situated in a busy area with a lot of pedestrian traffic, requiring appropriate safety measures such as signage, flagging and a spotter on the ground to direct pedestrians.

There was also a shared driveway along the western side of the property that could not be blocked.

Communication with both the public and the neighbouring tenants was essential in making sure the project ran smoothly, with as little disruption as possible.

The height also presented some unique challenges. The height itself was not an issue – we have a lot of experience working on tall buildings and using specialised equipment to reach high areas – but where the building was located.

Strong winds regularly came in from the ocean and funneled between the tall buildings all around, limiting when we could use the scissor lift and knuckle boom.

The Final Outcome

The result was stunning, retuning this prestigious building back to its original state and protecting it against the elements for years to come.

The Cedar went from grey and shabby to a vibrant and deep hue, beautifully contrasted by the metal and glass of the surrounding buildings.

The building managers were very satisfied with the outcome, highlighting the excellent colour match to the original aesthetic and minimal disruption to neighbours and pedestrians.

To see this landmark building for yourself, visit 138 Halsey Street next time you are down at Wynward Quarter.

15 Feb 2025

Bleached and Burned Cedar Looks Better Than New

This architecturally designed home in Titirangi is the perfect example of a well-designed Cedar home, with few soffits or overhangs for most of the structure, allowing the sun to weather the boards evenly.

This architecturally designed home in Titirangi is the perfect example of a well-designed Cedar home, with few soffits or overhangs for most of the structure.

This allows the sun to weather the boards evenly, making ongoing maintenance more straightforward and cost-effective.

The western face at the rear does have an overhang, and you can clearly see the uneven effect it can have on Cedar. Uneven weathering usually requires restoration as opposed to maintenance.

This Cedar was installed 10 years ago, with little more than a light oil to protect the timber against the harsh UV. That coating has long since burned off, leaving the Cedar exposed to the sun.

Thankfully, Cedar is such a resilient timber that a deep clean and oil can work wonders.

Maintenance Timeline

The customer first contacted us on the 15th of November, 2024.

21st November 2024 – Initial onsite assessment completed.
25th November 2024 – Quote sent.
6th January 2025 – Team arrived onsite to start the job.
21st January 2025 – Job completed.

Cedar Restoration Process

The initial assessment showed that the Cedar was in good overall condition, but the northern and western faces had been burned by the sun and were very dry.

Whatever protective application they initially used did not have any pigment, leaving the Cedar to turn grey over time.

The Cedar also had mould and bacteria growing on the outside, which happens when the harsh UV rays break down the surface of the timber. To remove the organic matter, we deep clean the Cedar using a biodegradable cleaning solution that is safe for pets and does not harm any surrounding plant life.

Once the timber is clean and dry, we can start to apply the oil.

The customer chose Wood-X Kauri Gum to give the Cedar a natural look, closely resembling wet Cedar. This is a mineral oil that soaks into the timber, leaving pigment on the surface to protect against the UV rays.

The northern face of the house runs long up the side of the property and is the first thing you see upon arrival.

The top of the cladding has been bleached by the sun. This was extremely dry and sucked up a lot of oil, around 4 square meters per litre.

If you look under the window frame, you can see where the windows have been cleaned with a brush. Cedar is very structurally sound, but the surface can be easily damaged if you are not careful.

The darker sections at the bottom are mould and pollen, which have been exacerbated by the surrounding bush. Sometimes the trees can protect the timber if they are nestled in tight, but the number of trees here added to the amount of pollen on the timber.

Cedar Restoration Challenges

There were two main challenges for this job: access issues and uneven weathering.

The southern face of the house has high walls and two large water tanks at the base. Without ground access we could not use ladders or mobile scaffolding. To gain safe access to this area, we used fixed scaffolding.

Both the southern and northern faces have uneven ground, with limited access, and required careful use of ladders.

The dormer situated on the roof at the back of the house also needed rope and harness to be done safely.

Souwest on roof wash .5 oil 1 plus .5 rope and harness

As mentioned before, it’s best not to have any soffits or overhangs on Cedar homes. While they do protect the timber from the sun, the effect can be aesthetically unpleasant, as seen here on the western face.

In the photo below, there is a line just below the overhang where the Cedar was shaded from the sun. To fix uneven weathering, our team needs to strip back the surface to an even finish and then apply oil.

The western face also had some black areas above the window which had been burned by the sun. Below the window, there were even darker areas caused by the rain hitting the concrete and bouncing back, causing dust and muck to accumulate.

The front of the house, which faces east, had a section of timber above the front door that had not been exposed to the sun and appeared orange (the natural colour of the Cedar), in stark contrast to the grey timber to either side. This required an expert touch to even up the colour, which can be seen below.

Ongoing Maintenance Requirements

Our recommendation is to recoat the northern and western faces within 3 months. If you look at the top of the walls in the after photos, the oil is already soaking in and appears lighter. And we used a lot of oil on this wall.

The recoat isn’t critical, but topping up the pockets in the Cedar with oil will provide maximum protection and make sure the colour remains consistent.

After that, the house will fall into a regular maintenance schedule, with sun exposed areas needing a recoat every 2-3 summers.

Final Thoughts

The customer was knocked back by the transformation. The years of grime and dirt were washed away and replaced by glistening Cedar that looked better than the day it was installed.

The contrast between the Kauri Gum tint and the black joinery looks amazing. We even washed their skylights while we were up there!

This was a quick job, with the bulk of the work being done in a week by our technicians, Mikey and Lorena. Great work, fantastic results!

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Stripping Back 8 Years of Moss & Lichen