SILVALarch™ Siberian Larch Cladding Overview

SILVALarch™ Siberian Larch Cladding Overview
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SILVALarch Cladding

Russian Siberian Larch Is One of the Toughest Softwoods in the World

The wood of Siberian Larch is highly valued for its remarkable properties and performance characteristics.  It is strong and durable, possessing especially high levels of resin which give the heartwood a natural resistance to decay.  As one of the toughest softwoods in the world, Siberian Larch is comparable to oak in density and strength.

Russian Siberian Larch Is One of the Toughest Softwoods in the World

At a Glance

At a Glance

  • Expected service life of 50+years (when correctly detailed and maintained)
  • Kiln dried to 16-18% moisture content
  • TRADA Durability Class: 3
  • FSC Certified
  • Attractive appearance
  • Factory coating available
At a Glance

Key Properties

Colour

Colour

The overall colour of Siberian Larch is a lustrous golden-brown. However, closer inspection will reveal a range of colours varying from the creamy white of the narrow sapwood to the straw-coloured or dark, reddish-brown of the heartwood.  When Siberian Larch is exposed to UV light it will turn silver-grey, unless protected by a pigmented surface protection.

Key Properties

Durability

Properly finished and maintained, Siberian Larch will have a service life of 50+ years.  It has a decay resistance of ‘Class 3 Moderately Durable’ according to the EN 113 standard.  Furthermore, BS 8417 provides for an expected 50-year service life if sapwood is excluded.

Durability

Key Properties

Stability

Stability

Dimensional stability is essential for a wood product to maintain its shape during its service life.  This is especially true of products that are subjected to the climatic changes of exterior applications.   

Siberian Larch is often chosen for applications subject to changing moisture and risk of frequent wetting.  Its low permeability means it can cope with varying levels of humidity without absorbing much water, and thus without severe shrinkage and swelling. 

Key Properties

Density

Siberian Larch is an extremely dense timber.  It far exceeds the density of other common softwoods and is similar in density / hardness to many hardwoods. Being a physically tough wood species that can withstand knocks and scrapes makes it suitable for use in applications such as schools and public spaces.

Density

Key Properties

Thermal Properties

Thermal Properties

Insulation plays a vital role in modern buildings.  Like all woods, Siberian Larch is an excellent thermal insulator due to air pockets within its cellular structure. 

Key Properties

Acoustic Properties

Siberian Larch wood can dampen vibrations. This makes it particularly effective for use as interior panelling, as it helps to reduce or confine noise. 

Acoustic Properties

Key Properties

Kiln-Dried

Kiln-Dried

SilvaLarch undergoes a controlled drying process at source using state-of-the-art kilns to reduce the moisture in the wood.  Kiln drying is preferable to air drying, as a far more consistent and accurate moisture level can be achieved. The main advantages of kiln drying are improved dimensional stability, the ability to apply a finish immediately and the capacity to install with minimal site acclimatisation. 

Profiles

Profiles

SILVALarch is available in the following profiles:

V-Joint Tongue and Groove
Channel
Channel Weatherboard
V-Joint Weatherboard
Rainscreen
Bevel
Shiplap
Fascia and Trim Boards

Silva also offers Larch corner solutions in a range of profiles. You can view our range of corner profiles here.

Profiles

Grades

Grades

Grades

At Silva, we hand select boards from the highest quality slow-grown Siberian Larch to meet our own stringent in-house quality standards.  SilvaLarch is available in three grades:

Silva A grade offers a clean, relatively knot-free appearance and is ideal for design-led projects.

Silva B grade displays well interspersed live knots and is an excellent choice for most applications.

Silva C is a more rustic grade displaying more frequent knots for a less uniform look.

You can find further grading information here.

Sourcing

Sourcing

Not to be confused with European Larch, Siberian Larch (sourced from the Irkutsk region of Russia) is a far superior material. With a plentiful supply of old-growth logs from this vast forest area, our supplying sawmill can provide us with a quality that far exceeds the official 'GOST 26002-83' grading standards.

SILVALarch timber is available exclusively through Silva. They are sustainably sourced from well-managed forests and supplied with full FSC chain of custody certification.

Sourcing

GRADING

SILVA A

SILVA A grade offers a clean, relatively knot-free appearance and is ideal for design-led projects.

  • The highest grade (comparable sawn grade ‘Unsorted’), containing the largest amount of mostly clear timber.
  • Graded to BS1116-3 Part 4 Class 1.
  • Many boards entirely free or practically free of knots.
  • Practically free of heart centre.
  • Sap free face.
  • End checks permitted not longer than 1.5 times the width of the board.
  • Tight live knots permitted up to 22.5mm diameter and a maximum of two knots per metre over the length of the board.

SILVA B

SILVA B grade displays well interspersed live knots and is an excellent choice for most applications.

  • Our most popular grade (comparable sawn grade ‘sawfalling’) allows slightly more knots and other natural characteristics than A.
  • Graded to BS1116-3 Part 4 Class 2.
  • Some boards entirely free or practically free of knots.
  • Practically free of heart centre.
  • Sap free face.
  • End checks permitted not longer than 1.5 times the width of the board.
  • Tight live knots permitted up to 35mm diameter and a maximum of two knots per metre over the length of the board.

SILVA C

SILVA C grade is a more rustic grade displaying more frequent knots for a less uniform look.

  • An economical grade that includes more frequent knots and a greater number of larger knots (comparable sawn grade ‘Fourths’).
  • Graded to BS1116-3 Part 4 Class 3.
  • Practically free of heart centre.
  • Most boards will have sap free face.
  • End checks permitted not longer than 1.5 times the width of the board.
  • Tight live knots permitted up to 50mm diameter and a maximum of two knots per metre over the length of the board.

FINISHING

Silva Factory Coating Service

Numerous reports by wood scientists and experts highlight that wood cladding performs best when supplied factory coated on all six sides.  The application of a coating is necessary to protect the wood from the damaging effects of moisture and UV, to help prevent the wood from turning grey and to curb the growth of fungi that produce mould or stains.

Although Siberian Larch is naturally durable, the application of a protective coating will improve its dimensional stability and increase its service life. However, it can be a difficult species to coat successfully.  Its high density and the presence of resins can prevent many coatings from properly adhering to the wood surface.  As a result, most film-forming finishes will fail, so it is necessary to use a coating system which is able to penetrate.  When factory coating Silva uses a specially formulated coating system which penetrates the wood surface to provide long-lasting protection with minimal maintenance.

SILVALarch™ Siberian Larch Cladding Overview

From £18.88 £15.73 per sqm

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Delivery

Timber delivery charges vary based on the products you have ordered, the location of your delivery, the value of your order and the delivery service you require.

Silva Select delivery – Our cheapest timber delivery service with goods expertly delivered by a member of our team on our own vehicles. Priced at £45 + VAT, orders are typically fulfilled within 7 working days*. Available to selected postcodes only.

Haulier delivery – Our haulier delivery service is for areas where our Silva Select service is not available. Lead-times for this service are guaranteed between 5-7 working days, subject to stock availability. Prices start from £95 + VAT.

Saturday deliveries – please call for a quote.

Free delivery is offered on orders over £2,000 + VAT**

You can view our delivery charges and services here.

Please note: As with most building materials, delivery is to the kerbside only.

* Typical lead-time for our Silva Select delivery service is 5-7 days although this is not guaranteed. Please allow up to 14 days for delivery especially at peak times.

** Exclusions apply. See Delivery Information tab for further details.

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