In this video & article, we discuss reSAWN’s Accoya modified wood offering which is prefinished with a waterborne exterior oil. Our one-coat (1C) and two-coat (2C) product offerings provide specifiers with the choice of a more saturated color if desired.
1C Option – Finished with 1 Coat
‘1C’ denotes Accoya wood that is prefinished with one coat of our proprietary exterior oil in the factory. There is no need to apply a second coat of finish post-install.
2C Option – Finished with 2 Coats
‘2C’ denotes Accoya wood that is prefinished with one coat of our proprietary exterior oil in the factory AND will require the installer to apply a second coat of finish post-install. This finish will be included on the sales order and shipped with the materials. Applying a second coat of finish post-install will further saturate the initial color of the cladding and extend the duration of the deeper color.
The video focuses on RAILAY 1C and RAILAY 2C, two of reSAWN’s Accoya wood products with a waterborne exterior oil.
Hi, I’m Diane with reSAWN TIMBER, and I’m here today to talk to you about several of our Accoya products that are available with 1C or 2C exterior finish. 1C indicates Accoya is prefinished with one of our exterior oils in the factory, and this does not require a second coat. 2C indicates Accoya is prefinished with one of our exterior oils in the factory, which will require a second coat onsite by the installer.
The big difference between 1C and 2C is the color saturation on day one and as it weathers over time. Applying a second coat of Accoya does enhance the initial color of the exterior cladding and it extends the life of that deeper color over time. However, if you choose not to apply that second coat of finish, that can be a cost savings for your project.
I’m here at the factory in Pennsylvania and we do testing of our own products outside on our weathering rigs. We test for aesthetics and performance. So here are two examples. This is RAILAY 1C and RAILAY 2C – these have been outside on our weathering rigs since September 2021. That is 10 months of accelerated weathering. It’s considered accelerated weathering because it’s on our rigs on a 45 degree angle facing due South.
So 10 months of accelerated weathering represents approximately 30 months on the job site. So you can see they are weathering a little bit differently, but yet they’re weathering beautifully. So as you have your project needs or requirements for exterior cladding and Accoya modified products, give us a call at reSAWN TIMBER and we’d be happy to help you out. Thanks!
What are the benefits of Accoya wood?
Performance: Tried and tested in the USA. Accoya wood is stable, water and rot-resistant, and comes with a warranty. Accoya wood is thoroughly tested and designed to perform with minimal movement (swell/shrink/distort). Accoya is indigestible by various insects, including termites, resulting in an effective barrier. With a 50-year above-ground and 25-year below-ground and freshwater warranty, Accoya wood can be specified with confidence and enjoyed for decades.
Finish: reSAWN’s carefully crafted Accoya products are thoroughly vetted and tested via reSAWN’s research and development processes to test the aesthetics and performance of the wood in addition to how it weathers. Materials will arrive on-site prefinished, with the option to apply a second coat if desired. Our proprietary finishing process combined with Accoya wood provides a beautiful, low-maintenance exterior siding option.
Sustainability: Sustainability is at the core of Accoya’s business and is part of the entire life cycle of the material, including sourcing, production, and recycling at the end of life. Accoya wood products are FSC® certified, have a low carbon footprint, and are non-toxic to people, pets, and the environment. Accoya wood is the only construction material to achieve Cradle to Cradle Platinum Certification™ for Material Health. Accoya wood siding specifications have a minimal environmental impact.
How is Accoya wood modified?
Accoya wood is modified through a process known as acetylation. Accoya takes radiata pine, a softwood, and subjects it to a vinegar known as acetic anhydride. Acetyls are naturally present in wood, and acetic anhydride enhances the hydroxyl groups, providing water-repelling characteristics. This process turns the softwood into a hardwood by preventing the cells in the wood from being able to absorb water. This vinegar is verified as non-toxic with Cradle to Cradle Certified Gold, scoring ‘Platinum’ for Material Health. This modification process gives Accoya its durability and rot and decay resistance.
Does Accoya wood require a lot of maintenance?
Not only is Accoya’s durability proven, but it has also been shown to retain its appearance, requiring much less frequent maintenance than other wood species. Since Accoya wood undergoes the acetylation modification process, it requires little to no maintenance. The modification process enhances the performance of Accoya wood, providing outstanding dimensional stability that results in lower maintenance frequency and therefore less coating over the lifetime of the product.
Accoya wood doesn’t require recoat maintenance. However, if the desire is to get back to that day one color, we do recommend a recoat for aesthetic purposes. Maintenance and recoating guidelines vary by product. Contact reSAWN TIMBER co. for product-specific information.
Samples of our Through Body Color Accoya products are available for architects and designers at no cost and shipped via UPS Ground. Click on the button below to order samples.
In this video & article, reSAWN shows you how to clean & recoat charred exterior siding. The video focuses on IKIGAI which is one of our charred Accoya materials. IKIGAI is first burnt in the Japanese style of shou sugi ban which accentuates the natural grain pattern. It is then brushed to remove most of the charcoal layer and finished with an exterior oil top coat.
Video Transcript: Hi, this is Ryan with reSAWN TIMBER co. ‘s R+D Department.
Today we’re going to be showing you how to clean an exterior cladding product in preparation for a recoat.
Keep in mind, that Accoya is a modified wood and doesn’t require recoat maintenance. However, if the desire is to get back to that day one color, we do recommend a recoat for aesthetic purposes.
So the first step in this process is knowing when your cladding was installed. So we know – our test board for IKIGAI has been out on our testing rigs. We know this was put outside 3 years ago (1 year of weathering = 3 years of accelerated weathering). So, that falls in the 3-4 year window of when we recommend recoats.
Accelerated Weathering Correlation
Accelerated weathering means exposure of our products facing South on a 45-degree angle. One year of accelerated weathering equals approximately three years of natural weathering.
Visual Inspection of Cladding
The next step would be to visually inspect the product for any kind of damage, fading, mold – things like that. And after taking a look at this, and knowing how long it’s been outside, we’ve decided to do a recoat on this product.
This product here is IKIGAI. This is a shou sugi ban product or a charred Accoya product.
And I think after we clean it and prep it and we get the finish on there, it’ll look just as good as the day it got installed*. So, let’s do that.
NOTE*: Maintenance and recoating guidelines vary by product. Contact reSAWN TIMBER co. for product-specific information.
Part 1 – Cleaning IKIGAI Accoya Exterior Wood Cladding
Step One – dampen the surface with water, using a garden hose if possible.
Step Two – apply reSAWN’s ready-to-use exterior wood cleaner using a soft-bristled brush.
NOTE: For lighter cleaning, the product can be diluted with water at a ratio of 1:2.
Step Three – scrub the treated area with a soft-bristled brush. That’s a nice soft-bristled brush. Working lengthwise along the wood until it is clean. For stubborn stains, repeating the treatment may be necessary.
Step Four – rinse thoroughly with water until all of the foam has been washed away.
Let the wood dry for a minimum of 24 hours before starting the recoat process.
Part 2 (Optional) – Recoating IKIGAI Accoya Exterior Wood Cladding
Step One – stir the oil finish provided by reSAWN thoroughly before use.
Step Two – once the clean surface is dry, apply a layer of oil finish supplied by reSAWN with a foam pad. Work length-wise across the boards. Maintain a wet edge to prevent any lap marks.
Step Three – wait for 1 to 3 minutes, allowing oil to penetrate. Then buff off traces of excess product with a piece of cloth.
Step Four – Let the surface dry for about 24 hours.
NOTE: Complete curing takes place after 7 days.
Cloths that are soaked in oil may spontaneously combust, and must therefore be submerged in water after use.
Accelerated Weather Testing at reSAWN TIMBER co.
At reSAWN, our Research & Development department ensures the quality assurance necessary to specify our exterior cladding products with confidence. Testing begins at the conception of a new product by placing the product on our accelerated weathering rigs. Our R & D team studies the finish performance and quality and structural performance of each product.
Accelerated Weathering is done at our facility in Telford, PA. Telford is located in the southeastern part of Pennsylvania in the Northeastern United States in the humid continental climate zone, with some characteristics of the humid subtropical climate that lies in Delaware and Maryland to the south. A humid continental climate is a climatic region typified by large seasonal temperature differences, with warm to hot (and often humid) summers and cold (sometimes severely cold in the northern areas) winters. Precipitation is usually distributed throughout the year. Telford experiences average temperatures of 25 °F to 45 °F in the winter and 65 °F to 85 °F in the summer. The average precipitation per month is around 3.5 inches with an average yearly precipitation of 41 inches. The average relative humidity for the year is 65%. The average UV index ranges from low-moderate in the winter (2-5) to high-very high in the summer (8-9).
Materials are installed facing due South with approx. 8 hours of direct sunlight per day at a 45-degree angle to accelerate weathering. The actual weathering appearance and time frame at your site will be different depending on several factors including climate, altitude, and facing. In general, the acceleration factor is roughly 3:1 and so for example, 1 year of accelerated weather testing can be correlated to roughly 3 years of natural weathering. However, taking into consideration the usual high variation of test results obtained with wood samples and the variations in climate zones, facings, and weather — it is impossible to make an exact correlation to the time associated with weathering at your site.
[3:1 has to be qualified as it relates to the material being installed as vertical cladding in a Southern exposure in the Northern Hemisphere. 3-5 Years for Northern exposure. In both conditions, this assumes full UV Exposure. Cladding blocked by UV exposure will alter these estimated time frames. If reSAWN material is used as roof cladding (specifically 12:12 pitch) it’s a 1:1 correlation.]
At reSAWN TIMBER co. we celebrate and visually leverage wood’s inherent tendency to weather over time by designing modern, high-performance products that are meant to age in place with grace.
We work with woods’ natural tendency to grey, not against it. Our products look beautiful on day one and continue to as nature takes over. Each board works cohesively together yet each board has its own visual story. The result is modern originality & inherent textural beauty with each and every project.
The natural beauty, durability, and availability of wood have made it one of the world’s oldest and most sustainable building materials. Today, architects and designers use real wood not only in a traditional sense but also in highly imaginative ways – both visually and technically. From an end-user perspective, a common issue with choosing real wood cladding for exterior facades is the perceived ongoing maintenance and uneven weathering on different structure parts.
Uneven Weathering on Uncoated Exterior Wood Cladding
In the last decade, wood finish manufacturers such as SiOO:X Wood Protection have improved the category’s overall design and performance capabilities to solve common building envelope issues. Now there’s a wood cladding finish option that combats weathering and ongoing maintenance issues by taking advantage of several technological advancements.
The SiOO:X Wood Protection System is a reactive coating system that creates a unique protective barrier to timber. It is designed to minimize the frequency of maintenance when compared to other semi-transparent coatings by creating a surface that becomes more attractive as it ages. SiOO:X mirrors the natural aging process of wood by accelerating the creation of a weathered, silver-grey appearance while giving long-life protection in a completely environmentally friendly way.
This also solves the issue of uneven weathering where some areas fade due to UV exposure, and others don’t. SiOO:X creates a consistent grey tone that mimics the look of weathered wood subjected to years of exposure from exterior elements. With SiOO:X, the wood will resemble a weathered look starting around 10-16 weeks after exterior installation, depending on the area’s climatic conditions.
Abodo® Vulcan Cladding in SiOO:X Finish
Abodo Vulcan Cladding in SiOO:X Finish
How Does SiOO:X Work?
SiOO:X is a patented, two-part application silicon technology system. Part one protects and strengthens the wood’s structure, and part two seals and protects the application of part one until the curing process is complete. Once applied SiOOX cures by reacting with carbon dioxide and moisture in the atmosphere to form an insoluble and flexible silica network within the timber surface. The silicon molecules then grow and expand in the cells and around the wood fibers, deep into the wood, creating the network. The formation of the silica network toughens the surface of the timber and forms an effective barrier against moisture, insect attack, and rot. The network fuses the silicon to the wood, strengthening it while creating a unique silicon shield that protects and gives the surface a natural grey finish. SiOO:X wood protection can last up to 15 years.
Abodo Vulcan Cladding in SiOO:X Finish
SiOO:X Wood Protector is applied first – it opens up and penetrates surface fibers in the wood cells where it forms a network of silica crystals, creating a barrier bonded to the surface. An application of SiOO:X Surface Protector is then applied which binds with the Wood Protector and prevents water penetration.
Step 1 – The first component, SiOO:X Wood Protector, has tiny silicon molecules that penetrate deep into the wood, where they react and form a solid protective layer over time.
Step 2 – The second component, SiOO:X Surface Protector, acts to seal and protect the first component until it is fully cured, and at the same time forms an inert water-resistant envelope. SiOO:XSurface Protector allows the right amount of moisture to enter, ensuring optimum conditions for the continued process of hardening and mineralization. The result is timber with a beautiful and uniform grey-driftwood appearance, long life protection, and less maintenance overall.
Is SiOO:X An Environmentally Sound Wood Surface Protector?
Yes. SiOO:X is a water-based and environmentally friendly wood surface protector inspired by how nature protects itself using silicon. Silicon is a naturally occurring mineral found in the natural world. It is in trees, other plants, and humans. Trees and plants absorb silicic acid from the soil which dissolves in water and is then transported in trunks and stalks, precipitating out in the organisms and making them stronger. The same natural process strengthens both teak wood in the rain forests and aspen trees in Swedish forests.
Petrified Log and Welwitschia at Namibia
Silicon also preserves wood. This can be seen in trees with petrified wood, which can be found in many locations worldwide. The cellulose in petrified trees is replaced with silicon, protecting them from the weather for millions of years.
What Are The Benefits of Using SiOO:X Wood Protection?
SiOO:X works with wood to protect against:
Sunshine and UV rays
Rain, frost, and snow
Algae and mold
Termites other unwanted insects
Advantages of SiOO:X Wood Protection:
Low Maintenance – Timber finished with SiOO:X can be regarded as low maintenance and can be left for 5-7 years before considering re-application. The wood will have cured to a naturally weathered appearance when a recoat is suggested in most circumstances. If a weathered appearance is desired, reapplication is not needed nor required.
Aesthetics – SiOO:X provides a long-term weathered look in a short period of time while keeping wood protected for years.
Penetrating – Non-film-forming coating penetrates into the timber surface and forms a natural protective barrier.
Natural – Plant-based ingredients that are safe for people and the environment.
Red List Free – Free from Red List chemicals as required by the Living Building Challenge.
Water-borne – Only water is needed for clean-up. No solvents are required.
Product Performance from Patented technology – SiOO:X carried out extensive tests at their sawmill and production site. In addition to this, they have an independent piece of research underway in conjunction with Napier University’s Centre of Wood Science and Technology. See test results here.
Abodo Vulcan Cladding in SiOO:X Finish
Benefits of Specifying SiOO:X Prefinished Exterior Cladding from reSAWN TIMBER co.
Research & Development – For each wood species, a certain understanding of how that species accepts finishes and how it will weather is crucial. reSAWN has the research, industry knowledge, and exterior wall assembly expertise to guide a specifier, builder, or end-user through the process. reSAWN TIMBER co.‘s Research and Development team has tested SiOO:X Wood Protection extensively. Repeated testing found wood surfaces do consistently become more attractive while resisting wear, wind, and weather in even the most demanding conditions. reSAWN’s weathering guidelines are available for prospective specifiers and customers.
State of the Art Finishing and Texturing Equipment – Our state-of-the-art finishing and texturing equipment offers sophisticated results that cannot be achieved during site finishing.
Maximum Finish Penetration – Our machine applications ensure proper spread rates are maintained. SiOO:X is brushed deep into the surface for a longer product life span.
Drying Time & Space – Drying racks that hold wet cladding on a job site are costly and take up much-needed space. reSAWN TIMBER co.’s prefinished wood materials are finished and dried in a controlled environment prior to arriving on a job site.
Product Protection – Wood siding is protected from exposure to water and sunlight until it arrives at the construction site.
Save Space – Save physical space on a job site by eliminating the coating phase from the construction process.
Year-Round Finishing & Installation – No weather or humidity delays for stain application. reSAWN’s manufacturing facility is climate controlled and operates 12 months out of the year.
Abodo Vulcan Cladding in SiOO:X Finish
How Long Does It Take For Exterior Wall Cladding To Become Silver-Gray?
Treated wood is initially yellowish-brown and a bit mottled. The curing and bleaching process starts in contact with water, and after 6–12 months, the cladding will begin to have a lovely, even silver-grey tone. The curing and bleaching process then continues for up to 2 years by which time the timber will be a pale, grey driftwood color.
SiOO:X Finish – Day 1
SiOO:X Finish – Weathered 6 Months
Will all exterior areas cure to the same tone, regardless of exposure to rain and other climatic elements?
Yes, however extremely sheltered areas (for example, under large overhangs) may take longer to turn entirely grey. Sheltered areas can be doused with water periodically to speed up the curing/weathering process. This process can be repeated several times as required.
Abodo Vulcan Cladding in SiOO:X Finish
This color variation evens out quickly and, over a period of 10-16 weeks once exposed to moisture and humidity in the atmosphere, the timber will lighten and develop a uniform appearance as the SiOO:X cures.
If I order exterior cladding pre-coated in SiOO:X, what color will it be when delivered to a job site?
Immediately after the application of SiOO:X, the color can range from the wood’s original color to a dark brown. The color of the boards may also vary depending on the tannin content.
Job Site Photo: Sag Harbor, New York – Abodo Vulcan Cladding in SiOO:X Finish
Abodo Vulcan Cladding – SiOO:X Finish
What’s the Best Timber Substrate?
SiOO:X works on many types of timber; however, according to SiOO:X Technologists: “Abodo Vulcan Cladding is recommended. It’s a thermally modified softwood that is durable with low movement. These are key aspects to maximize the performance of the SiOO:X wood protection system.”
Abodo Vulcan Cladding by reSAWN TIMBER co. finished in SiOO:X
“Furthermore, the medium density of Abodo Vulcan timber combined with its textured sawn face means that the reactive wood protection can penetrate well into the timber and react with it to create the best possible durability.”
When Abodo Vulcan Cladding is finished with SiOO:X Wood Protection system, the result is timber with a beautiful and uniform grey driftwood appearance, long life protection, and less maintenance overall.
Abodo Wood Manufacturing Facility, New Zealand
Abodo Vulcan thermally modified wood cladding is created from New Zealand plantation timber and engineered with a patented vertical grain orientation for superior weathering characteristics.
The thermal modification process and vertical grain structure give Vulcan cladding superior stability and reduced resin content. It’s naturally durable so the timber doesn’t require any chemical preservatives, and has a beautiful, consistent brown tone. reSAWN TIMBER co. is proud to be the exclusive manufacturer and distributor of Abodo thermally modified Abodo Vulcan Cladding and in the USA.
Abodo Vulcan Cladding Ceiling Soffits in SiOO:X Finish
Experience the Difference of Wood Protection with Patented Silicon Technology
SiOO:X Wood Protector products are specified by world-leading architects, designers, and homeowners seeking sustainable and natural wood protection solutions. Experience the difference of an even consistent, beautiful patina and wood protection that preserves wooden surfaces and protects them at depth using nature’s own silicon technology.
Samples of our SiOO:X prefinished wood are available for architects and designers at no cost and shipped via UPS Ground. Click on the button below for more information about SiOO:X prefinished exterior cladding.