NORclad Siberian Larch Timber Cladding

Siberian Larch timber cladding is a durable specie with the sapwood omitted. It is a slow grown high density, softwood with a colour that ranges from a light straw yellow to a gold/brown in the heartwood area.

Siberian larch is one of the most durable species of coniferous softwood and comes from Siberia in Russia. It is one of the hardest and strongest commercial softwoods, excellent machining properties, though knots may be troublesome, and is suitable for many end uses from external joinery and cladding applications, areas of potential high impact damage such as schools, shops to boat planking.

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Bristol Bears Training Facility

Churchward School

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Glenside Campus, UWE, Bristol

Detailed Information

Wood Type

Softwood

Origin

Russia

Sustainability

Sourced from well managed forests – FSC® certified.

Availability

Sawn and planed products in a wide range of thicknesses, widths and profiled patterns.

Colour

Varies from pale yellow to Orange to Golden Brown.

Quality

NORclad typically offer Siberian Larch in A, or B Grade

Typical end uses

Joinery and Cladding.

Durability

Moderately Durable.

Density

590-650 kg per m3 at 14% moisture content.

Dimensional stability

It has a tendency to distort when wet or not dried, but once dry, is generally stable.

Fixings

Stainless steel fixings are always recommended.

Strength & working properties

It is one of the hardest and strongest commercial softwoods available, with only Pitch Pine generally stronger. It can be sawn and machined well however it can split on nailing so pilot drilling of fixing holes is recommended particularly at board ends.

Typical section sizes

Ex 25, 32, 50, 75mm x 25, 50, 75, 100, 125, 150, 175mm

Typical Lengths

2.4m – 4.0m

Grades

All grading information is given as general guidance, to meet the criteria set through CE marking, quality and grading requirements.

Siberian Larch timber cladding will colour down if it is not protected as soon as installation is complete with a good quality semi or fully translucent UV-radiation protective coating. It also comes in two different quality grades:

Siberian Larch A

FSC Certified, sustainably sourced Timber
Imported from Russia
All timber is sourced and machined to CE Quality Grading Requirements
Kiln Dried to 14-20% Moisture content
Typically 4.0m lengths
Average knot diameter: 40mm. Commonly referred to as Unsorted (Grade I-III)

Siberian Larch B

FSC Certified, sustainably sourced Timber
Imported from Russia
All timber is sourced and machined to CE Quality Grading Requirements
Kiln Dried to 14-20% Moisture content
Typically 4.0m lengths
Average knot diameter: 60mm. Commonly referred to as Sawfalling (Grade I-IV)

Treatments & Bespoke Products

Treatments

Treatments can be applied to various cladding species to enhance or alter their colour or give them long term protection against the elements.

NORCLAD BRUNNEA

The treatment process impregnates wood cladding with a blend of preservative and Brunnea pigment.

From experience to date, exposure trials and commercial practice, you can expect the appearance of Brunnea treated wood to enrich after initial exposure.

NORCLAD LITE

NORclad Lite provides a 30 year warranty against rot & fungal decay.

The treatment process impregnates wood cladding with preservative and copper.
Without any pigment in the treatment, your timber cladding will naturally weather to a silver grey over time.

Bespoke Products

The requirements of every project is different and we’re here to help ensure that the cladding you specify is the right one for you. We offer bespoke services ensuring that your cladding is fit for purpose.

Fire Protection / Euro Class B

The NORclad range of cladding is available with fire protection to the following British and European standards.

Euroclass B-s1-d0 (s1 Smoke Production – d0 Flaming Droplets).

BS EN 13823 & BS EN 11925-2 Single Burning Item Equivalent to UK “Class O” BS 476: Part 6 & BS 476: Part 7

BRISE SOLEIL / AEROFOILS / BESPOKE ITEMS

Aerofoils and Bespoke items are an area where we have no ‘standard’ Timber Species, Size, or Profile.

A great way to give an elevation a softer appearance, to over clad elements of a large structure that would otherwise be quite intrusive – the large slab side of a car park or sports hall for instance.ey over time.

TIMBER DECKING

Use timber decking to modernise your outdoor area.

Timber Decking can be machined from any species that we offer, although a timber such as Western Red Cedar is very soft, and could damage easily. The most popular species that we offer for our decking is European Redwood, in either an Unsorted, or Fifths grade.

Profiles

NWC1

NWC2

NWC3

NWC4

NWC5

PSE

NWCC1

NWFE2

NWS1

Get in touch for other requirements, including bespoke profiles, various sized PSE boards and Window reveals/cill.

Specify

If you have decided that Timber Cladding is going to be one of the materials on your project the next step is to create a specification that will meet the criteria and expectations you, and your client have.

NORclad will be happy to talk through what is available and enable you to select, amongst others: species, profile, size, treatment, requirement for Euro Class B, service life.

We offer installation guidance, detailing guidance based on TRADA documentation, with a wealth of knowledge and information on how different timbers will perform over the life span of your project.

Considerations that should be made when it comes to weather, along with how elevation and design variations can impact timber cladding.

Please get in contact if you would like NORclad to create an H21 specification for you, or download direct via NBS here.