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Lunawood Thermowood: A sustainable and technically preeminent alternative to the Russian Siberian Larch Pine.

03/12/2023

Common features

Siberian Larch Pine fades to a gray-silver naturally with exposure, but can maintainits original color with good UV maintenance. Just like Lunawood wood.

 

The high resin content makes Siberian pine durable, with a class 3 durability (EN350-2).  Lunawood heat-treated wood  is resin-free and durable thanks to thermal modification, with class 2 durability (EN350-2). Thermal modification increases the biological durability of wood.

In addition, thermal modification only with heat and steam, without chemicals, improves the technical properties of  Lunawood heat-treated wood, making it very dimensionally stable for decades.

 

Visual comparison

Siberian Pine

Lunawood
  • Straw yellow or pale reddish-brown to brick-red in color with sharply defined narrow, lighter-colored sapwood -color varies
  • Annual and marked annual levels
  • Textura and grain especiales thanks to its density
  • Heartwood can be seen or not, by the way it is sawn
  • This species can usually contain small knots.
  • If left about two years without treatment, the wood is naturally stained a silvery gray
  • Unified brown-gold color
  • Maintained color and durability
  • Round knots
  • Turns silvery-gray if left untreated

 

 

Technical properties

Siberian Pine

Lunawood
  • Density 590-650kg/m3
  • Resinous wood
  • Balanced humidity 12%
  • Durability class 3 (EN 350-2)
  • One of the problems of this wood is its tendency to deform and turn during drying.
  • With a conductivity ratio of (y10) of approximately 0.13W/(mk) it is an excellent spice for temperature preservation.
  • Difficult to treat
  • Reaction to fire D-s1,d0
  • Density 420 kg/m3
  • Resin-free
  • Balanced humidity 7.3%
  • Durability class 2 (EN 350-2), use class 3 (BS EN 335)
  • Does not absorb moisture
  • Dimensionally stable
  • Conductivity about 20% lower than other woods. Thermal conductivity is y10 of 0.09W/(mK)
  • It can be treated or left untreated which will not affect its durability
  • Reaction to fire D-s1, d0

 

  • Lunawood Thermowood has better durability than Siberian pine
  • Siberian pine is much more difficult to treat due to its structure and the amount of resin
  • The color of Siberian pine varies greatly

 

Movement of wood

The movement of wood is a change in the dimensions of wood caused by changes in the environment related to humidity and temperature.

When the humidity is high, the wood absorbs the moisture and widens. When moisture falls, the wood is compacted. This movement is gradual and is not noticeable in weeks, but between seasons it can be a problem for doors, spaces between joints in wood work or the appearance of cracks in tables.

Installation

Siberian Pine

Lunawood
  1. Due to the natural properties of Siberian larch, it canbe broken when putting nails, so it is advisable to drill holes before fixing the wood.
  2. Stainless steel screws, fixed visible
  3. Siberian larch has a high resin content, so it takes time to dry. This means that it needs to be dried slowly and give time to achieve the desired properties before building. It is important to ensure that the wood has achieved  balance before you startinstalling it.
  4. Siberian larch can be sawn and mechanized well, making it a practical and effective choice for building projects
  1. Pre-pdrill holes when the mount is less than 70 mm from the end of the profile. In this way we avoid the risk of breakage during installation.
  2. Stainless steel screws, invisible fixed
  3. Ready to install. Lunawood products  are very light
  4. Sawing wood Lunawood is just as easy as sawing any other wood

 

Origin of wood

Siberian larch: Northwest Russia and western Siberia. Also known as Russian Larch, this slow-growing tree is native to very cold climates and takes between 70 and 80 years to mature.

Lunawood: Sourced from sustainable Finnish forests and thermally modified in Finland. The tree takes 60-80 years to mature.

 

Arguments for Lunawood

  1. Little maintenance and natural souring process. Same phases as the natural process of souring and the final result is the same.
  2. Lunawood is very organic and authentic. It is non-toxic and the totally chemical-free process gives the product the same properties, but improving dimensional stability.
  3. The origin of Lunawood is from a very similar climate and vegetation area
  4. The origin of Lunawood is Finland. Raw material comes from sustainable Finnish forests
  5. Controlled quality, applied to color as well
  6. Light weight and easy to install, even with hidden screwing
  7. Wide range of profiles with digital design support

 

Technical comparisons

 

Siberian larch

Lunawood Thermowood

 Dimensional stability

-

✅

Durability (EN ISO 350-2)

Clase 3

Clase 2

Lamination

✅

-

Broken

✅

-

Low maintenance

✅

✅

Natural cracking

✅

✅

Knots

✅

✅

 Life cycle

20-30 years

20-30 years

Availability

-

✅

Origin

Russia

Finlandia

 

 

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