Exterior installation manual

Storage Precautions

Do not store the wood planks in uncontrolled environmental conditions: water, humid, or direct sunlight.

For storage, place a crosspiece at the same length in a horizontal position and store it horizontally.

Pre-construction inspection

Due to the nature of wood, do not leave it on the side for a long time after unpacking, or cracking, twisting, etc. may occur depending on the environment of the construction site, so please be careful. This product is for exterior use only, so please refrain from interior use.

Set up

Because wood is a natural material, the color, the grain, etc. might be different from one another. Please make a temporary line before starting to install, check the balance of the color and wooden pattern, and also, in the case of painted products, please check the quality to see if there is any uneven paint processing or scratches for each plank.

※If you notice any defect such as processing defects or paint defects, please contact us before installation.

※Dead knots, black knots, crack knots, and chips were all treated by putty but minor cracks and dents may be included.

 

In the case of unpainted products, it is highly recommended to protect the surface with a clear protective finish in advance.

For storage before use, please keep away from direct sunlight, humidity, rain, moisture etc.

Color difference/burn

Due to the nature of the wood, the color and grain varies from each piece. In addition, sunlight (ultraviolet rays) causes sunburn and discoloration as well as human skin. Therefore, the color may be different between the exposed part and the non-exposed part.

Longevity and maintenance for exterior

The exterior cladding will weather and change over time. The degree of change will vary depending on local environmental conditions and location conditions such as direct sunlight (ultraviolet rays), rainwater (acid rain etc.), cold and warm environment and wind. Therefore, it is not possible to say "how many years before to see a change in color tone", but if you perform appropriate maintenance (re-painting) regularly, you can delay the weathering process due to the natural environment and maintain the feel of the product. It is recommended that you apply a maintenance coating to keep the color consistent over time. We recommend a clear permeable protective coating that does not interfere with the breathing of the wood.

For our SUMI type coated products are coated with the purpose of suppressing stains during construction, so the coating strength is not as strong as the normal type.

 

When painting, be sure to follow the paint manufacturer's instructions.

All painted products will need to be repainted once in while due to aging. In that case, if you perform appropriate maintenance on a regular basis, you can delay weathering due to the natural environment and maintain the feel of the product.

When handling, be sure to use protective gloves to prevent injuries caused by thorns and to prevent stain on the product.

When cutting, be careful of injuries and wear protective glasses and dust-proof masks.

 

Wooden products are soft and easy to break, so please handle them carefully when storing or moving them. Because wood is a natural material, the grain and coloration are all different. Make sure to do a temporary lay-out before installing and check color uniformity.

 

For exterior application make sure to use a waterproof sheet layer as a base.

For exterior application make sure to use a drainer. If it is not used, there is a risk that wood or charcoal adheres to the foundation etc. and stain it.

For the nails, use flat head screw nails that are more than 3 times the plank thickness; nails for burnt cedar, etc. Do not use ordinary nails.

Please screw nail with a 45 degrees angle to ground when use Profile No.4,5 and hide nail head.

As it is a solid-sawn wood product, it expands and contracts depending on the humidity of the site.

The expansion and contraction ratio will be different for each plank, so please be sure to mark them out at the time of construction.

 

When attaching a signboard, etc. after construction, put a reinforcing material etc. in the base and attach it to a place with sufficient strength. If it is fixed only to the product, there will be a lack of strength.

For SUMI, the charcoal on the surface is brittle and peels off due to shock or friction, so be careful.

Although it is not noticeable when it peels off, but it gradually deteriorates over time and only that part fades away.

When hitting a nail on the surface, especially for SUMI, the charcoal on the surface tends to peel off, so do not screw the head of the nail strongly.

Interior installation manual

Storage Precautions

Do not store the wood planks in uncontrolled environmental conditions: water, humid, or direct sunlight.

For storage, place a crosspiece at the same length in a horizontal position and store it horizontally.

Pre-construction inspection

Due to the nature of wood, do not leave it on the side for a long time after unpacking, or cracking, twisting, etc. may occur depending on the environment of the construction site, so please be careful. This product is for interior use only, so please refrain from exterior use.

Set up

Because wood is a natural material, the color, the grain, etc. might be different from one another. Please make a temporary line before starting to install, check the balance of the color and wooden pattern, and also, in the case of painted products, please check the quality to see if there is any uneven paint processing or scratches for each plank.

※If you notice any defect such as processing defects or paint defects, please contact us before installation.

※Dead knots, black knots, crack knots, and chips were all treated by putty but minor cracks and dents may be included.

Construction Method

  1. Please use stud and furry that are not bent and dry stud for wall substrate material and finished at intervals of 303 to 455mm. Use screw nails that are more than twice the thickness of the product.

  2. Please mark the position of the stud or furry on the base plywood or plaster board.

  3. Changes in humidity may cause expansion and contraction of the wood. When construction is applied to a place where warping is likely to occur, apply adhesive to the back side.

  4. Use a flat head screw nail that is more than twice the thickness of the board, nails for Yakisugi, etc., and do not use regular nails. In principle, please screw nails in two places of width. Please screw nail with a 45 degrees angle from ground when use Profile No.4, 5 and hide nail head.

  5. Please make a clearance of about 5 mm on both ends of the paneling in the width direction.

  6. When finishing the upper part of the wainscot with plaster, it is easy to cause warts and expansion due to moisture, so be careful.

  7. If you apply a polyurethane coat on an unpainted product, be sure to do so before construction. It is recommended to coat on both sides to prevent warping, bending, etc.

In the case of an oil-based paint, it is possible to coat the wood even after construction.

Curing

・Do not attach the curing tape directly to the wall, as it may damage the surface.

・For SUMI, the charcoal on the surface is brittle and peels off due to shock or friction, so be careful.

・Cover the entire wall with a curing sheet. If some of them are exposed, they may get sunburned and have a different color than others.

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