Hinoki

Hinoki is an aromatic cypress species native to central and southern Japan. The wood contains natural oils including hinokitiols, which make it resistant to rot, fungi, and insects. The fresh and robust aroma has a lemon-like scent that has been shown in academic studies to offer some unique health benefits. 

Hinoki is considered a sacred species in the indigenous animistic Shinto tradition and is the primary species used in Shinto shrine construction. In fact, hinoki becomes stronger as it ages and due to its astounding durability, many of these shrines as well as Buddhist temples remain intact after hundreds of years. Hinoki lumber has been shown to gradually weaken starting 1,000 years after the building is erected.

As a building material, Hinoki is versatile—with applications ranging from framing timbers, interior paneling, and exterior siding, to flooring and furniture. It is an especially outstanding option for tubs and saunas, where its calming and beneficial aroma is elevated. Hinoki can be used oiled or unoiled–but due to its beneficial aroma, it is generally used without an oil finish.

Our unoiled Hinoki and sugi products offer an ideal choice for sauna interiors. However, it’s important to note that yakisugi “shou sugi ban” charred wood products or any kind of oil finish or stain should not be specified in sauna applications. Please see our Hinoki Moulder Blank page for specification and ordering information.

On sauna applications there are a few important parameters to follow for best results. Make sure that the lumber is under 10% moisture content before moulding and installation. Mould into a profile that allows for dramatic swelling and shrinkage without becoming noticeable. This generally means a 3/8” long tongue and groove, with a 1/4″ or so nickel gap in the profile. Acclimate the paneling stickered in the sauna itself for two weeks under normal operating conditions before installation. For best results elevate the stickered lumber on saw horses or scaffolding towards the top half of the room to expose it to the most extreme conditions. Design in a vented screen wall assembly and install with stainless steel 15gauge or larger headed nails through the tongue. Set face nails since the fasteners get very hot to the touch.

It is important to note that sauna applications are the most challenging of all installation conditions.  Atmospheric conditions can vary according to room design, heater specifications, and heater operation, especially if administered by a group. In some cases, no matter how careful the millwork or installation are executed, there can still be considerable dimensional movement and sometimes failure requiring replacement.

Our products are installed using standard best practices for natural wood siding. Any licensed and competent contractor should be capable of installing our products. We encourage you to thoroughly review our installation manual and consult with your local building professional to ensure proper installation for your specific project.

Nakamoto Forestry North America lumber products come from privately owned forests in Western Japan that have been sustainably managed for generations. 

Please visit our sustainability page for certifications and EPDs.