Cedar Care and Wet Weather

Cedar Care and Wet Weather

4 Jul 2025
Cedar care and wet weather

One of the most common questions we get asked is “Can I get my Cedar maintained in the winter?”

Absolutely! With winter, comes rain…but not as much as you might think.

At the height of the wet season, there are 19.1 rain days in June and 20 in August. In summer, there are there are 14.1 rain days in December and 9.8 days in February.

That’s only 6-10 days difference.

Yes, Auckland is a rainy place! But we’ve been looking after Cedar for 12 months of the year, for over 30 years, and rain isn’t as big of a problem as you might think.

This comes down to the unique properties of Cedar and how we care for it.

Oil and Stain Are Not Paint

The statement above may seem obvious, but the idea of paint drying is so fixed in our collective minds that people often make the comparison.

Aside from both being applied to walls, they couldn’t be more different products.

Paint is applied by building a film on the surface of another film, which then must dry and cure.

Stain and oil penetrate into the pores of the Cedar and start providing protection against moisture almost immediately.

You could even spray the boards lightly with a hose 20-30 minutes after application and it would make no difference to the finish.

How Wet is Wet?

Similarly, in most people’s minds, when a board gets wet, it is wet the whole way through. This is only what our eyes are telling us.

In truth, it’s only the surface that gets wet (usually the top 1mm), the rest of the board stays perfectly dry.

To apply a Cedar coating, we only need the surface of the board to dry out. Depending on exposure to the sun, wind and air temperature, this can happen anywhere between 5 – 30 minutes.

You can feel whether Cedar it is dry or not by touching the boards. If the surface is too wet, we simply do not apply the coating.

Mark likes to use the analogy of hanging out washing. If you are happy to put out your washing to dry, you can coat Cedar.

And if a spattering of rain does get onto the surface, the oil or stain is already working to create a barrier against moisture.

What Happens if it Does Rain?

Every morning, the Senior Technicians assigned to the job will look at the weather and work with the Production Manager to make the call. In most cases, the decision has been made the previous day.

Our scheduling team also looks at the weather in advance and plans accordingly. If rainy weather is on the way, they will book in other work such as washing or adapt the scheduled work to the conditions.

If the weather is inclement, the technicians can focus on areas of the house away from the wind and rain.

If the weather is coming from the north, we can coat the areas on the south, or undercover areas.

If rain is truly setting in, we can wash the Cedar in preparation for coating. During periods of persistent rain, there can be a gap of 1-2 weeks between washing and coating, but this could be left up to 6 weeks without any issues.

So, When is the Best Time to Coat?

The answer is always now. If you ask us in 6 weeks or 6 months, the answer will be the same.

We are battling the sun here, and the sun always wins. New Zealand’s harsh UV rays are constantly sucking the natural tannins from the boards and they need to be coated to protect against the wet-dry-wet effect.

If left longer than the recommended 2-3 summers, the surface can begin to roughen and create a toe-hold for mould and lichen, resulting in an unkempt look.

This isn’t scaremongering. If you leave them for another 6 months, the difference is almost indiscernible. But that doesn’t change the fact that there is no “best time” for Cedar maintenance.

The best time is always now. You just need to pick your days.

Final Thoughts

We have been doing this for over 30 years and know our way around a bit of rain.

If the boards are dry, we can coat them. Once we get to the point where the boards are wet and will not dry, we stop. Simple as that.

Don’t let the idea of rain put you off getting your Cedar maintained and protected. Winter is just as good as summer, and autumn is just as good as spring. The sun never stops and neither do we!

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14 Mar 2023
Many Cedar homeowners fall in love with the Scandinavian silvered look – minimalist, clean, with a silver sheen that accentuates the beauty of the timber and the natural surroundings.

Many Cedar homeowners fall in love with the Scandinavian silvered look – minimalist, clean, with a silver sheen that accentuates the beauty of the timber and the natural surroundings.

But when it comes to achieving this look, there is a common misconception that all you need to do is leave the Cedar and silvering will happen naturally.

Unfortunately, this is not true, at least in the New Zealand climate, and timber that is left to silver will eventually turn unsightly.

In this article we will cover what silvering is, how you can silver your Cedar safely while still protecting the timber, and some DIY tips for maintaining the silver look of your Cedar until you are ready to oil.

To find out more, read the full article, or watch the video below for a quick summary.

Is Silvering Bad for Cedar? 

Without taking the location and climate into consideration, silvering itself is not bad for the timber. Silvering is caused by exposure to UV rays, which fray and loosen the top cells of the Cedar and cause the surface to become bleached.

silvered-cedar

In colder climates this isn’t a problem as the lower temperatures kill off the bacteria, retaining the beautiful, silvered look. But in a warm and wet climate such as ours, bacteria and mould will get caught in the roughened surface, and quickly turn the Cedar black.

Even if the mould and bacteria are removed, the natural silvering effect will often look patchy and uneven, detracting from the natural beauty of the timber.

Silvering Cedar the Right Way

So, is there any way to have the silver look you love, while still protecting your cladding? The answer is a resounding “Yes!”

Wood-X is a deep penetrating wood oil developed with Resene. It comes in a range of exciting colours – from rich reds and bush greens to a daring indigo blue – and a whole range of wood-protecting silvers. Applying a silver-tinted oil will protect your timber from the harsh UV rays, allow it to silver more quickly and give a more consistent silver look.

After applying the silver-tinted oil, you will need to follow a regular maintenance schedule to keep your Cedar looking its best. We recommend a soft wash every year, followed by recoating exposed areas every 2-3 summers.

DIY Silvering Maintenance

If you are not ready to oil your cladding quite just yet, a more affordable solution is to spray your house with a slow-acting mould and fungal killer such as Wet and Forget. This will remove the organic bacteria from the surface, but it will not replenish the natural oils of the Cedar or protect it against splitting and cupping in the future.

If you do not plan on oiling or staining your house, another option is to leave the silvering on as it provides natural protection to the layer below it. You can then use a slow-acting mould and fungal killer to keep it looking clean. The downside to this approach is that the timber will eventually look aged and tired.

Get Professional Advice You Can Trust

Ultimately, the best approach for protecting your cladding AND getting the silvered look is to oil your Cedar with a silver tinted oil. If you are unsure about the best approach and would like to talk with an expert, call us on 0800 298 298.

There is no obligation and our goal is always to look after the best interests of our customers over the lifecycle of their homes.

We love Cedar and are always happy to help!

15 Feb 2023
The quick answer is: not as often as you might think. On a wall that is not in the intense sunshine, Cedar will practically last forever.

The quick answer is: not as often as you might think. On a wall that is not in the intense sunshine, Cedar will practically last forever.

Apart from being stunning to look at, Cedar is extremely durable, a superior insulator and genius at taking up deep-penetrating oil. Cedar’s worst enemy is not rain, or wind, or city grime; it’s the harsh New Zealand sun. 

Left unprotected, 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 make the timber look unsightly.

Regular oiling will prolong the beautiful look and weather resistance of your Cedar by penetrating deeply through the Cedar’s open cellular structure and replacing the natural oils lost over time.

Keep reading to learn how often you need to maintain your Cedar, or watch the video below for a quick summary.

What Does Regular Maintenance Involve?

For most Cedar homes, regular maintenance will consist of a light rinse once per year at the end of winter, then a recoat of exposed areas every 2-3 summers.

Cladding only needs to be maintained on a face that is exposed to the UV rays. The remaining faces will also benefit from recoating, but this might only be 2 or 3 times over a 15-year period. The treatment that is required is very dependent on the level of UV exposure and other environmental factors.

exposed-cedar

Think of it like washing your car. If you don’t wash your car for 12 months, all the dust, debris and contaminants from the road will stick to the body. It’s the same for your house, but not as easy to spot as houses are usually flat colours compared to a shiny paint job.

How Much Will Regular Maintenance Cost?

It’s a misconception that owning a Cedar home means you will be burdened with expensive maintenance bills. Compared to houses that require regular painting, Cedar works out far more economical.

The cost will depend on the unique requirements of each house. The main factors will be the size of the house, how many stories it has and ease of access. A single-story bungalow with good access might cost $2-3k every 2-3 years. For a multi-level property with difficult access, you might be spending $8k on scaffolding before you even start looking at the timber.

Regardless of the cost, regularly maintaining your Cedar will always be cheaper over the long run than painting, or the worst-case scenario, having to reclad due to the timber cupping and splitting.

Having a regular maintenance plan can help to spread out the cost and give you peace of mind that your investment is protected – and will look beautiful for years to come.

New Builds vs Older Houses

Newly installed Cedar has a reservoir of natural oils and tannins, and it will take longer for the cellular structure to start to move. You may not have to do anything for 5 years, but eventually the Cedar will start to dry out and you will need to slow that process down with regular oiling.

New Cedar will most likely be pre-coated, or coated on-site before it gets installed. There will usually be a booklet that comes with the house telling you how the Cedar has been treated and what kind of maintenance it needs.

For a pre-existing Cedar home, the new homeowner will need to ask the previous owners what kind of maintenance plan they had in place, or what products they have used in the past. If the Cedar has been stained and the stain is in good condition, then it requires a light rinse every year and a recoat every 2-3 years, depending on the level of UV exposure.

If you are unsure about the status of your Cedar, one of our team can come around and advise you on what treatment it has received in the past, and what is required to maintain the Cedar over the lifetime of the house.

Make Your Cedar Look New Again

TimberTech are NZ’s #1 choice for Cedar protection, maintenance and restoration. Our unrivalled expertise and craftsmanship have been developed and proven over 20 years throughout New Zealand.

We will diagnose your Cedar and put together a 10-year maintenance plan, customised to your unique situation, with a maintenance schedule and a full breakdown of all the costs. There is no obligation and our goal is always to look after the best interests of our customers over the lifecycle of their homes.

To find out more, call us on 0800 298 298.

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