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Scotlarch® - Timber Cladding

Verified by manufacturer 27 days ago

Board on board (BOB) Profile - Vertical

Russwood Ltd Variant:
Third party certifications:
  • Certificate of constancy of performance

    Certificate type

  • EPD

    EPD

    Certificate type

  • DoP

    DoP

    Certificate type

  • UK Conformity Assessed (UKCA)

    UK Conformity Assessed (UKCA)

    Certificate type

Scottish Larch timber cladding.

Jump to:
BOS
+44 (0)1540 673648 Website

Application

Suitable for use as external timber cladding.

Description

A locally sourced timber which provides a durable, natural, and cost-effective cladding solution.

 

Supplied using selected heartwood of Scottish Larch, boards can encompass a warm mix of colours; from pale orange/ brown through to reddish brown shades. In ideal conditions, Scotlarch® will weather to a muted shade of silver/grey which is desirable in many cladding projects. There are frequent knots in the boards, which demonstrate the natural origins of the product and give it a characterful look.

 

The product is a naturally durable timber and, for external cladding purposes, is classed as “moderately durable” (Class 3 according to BS EN 350-2). This is due to the tannins in the wood which create a resistance to decay. With correct detailing (e.g. no sapwood on working faces) and appropriate fixings, it should have a lifespan potential of at least 50 years.

 

Suitable for factory coating in SiOO:X, a breakthrough silicon technology which provides a weathered appearance at an accelerated rate.

 

Features and benefits:

  • Durability Class 3 as per BS EN 350-2.
  • Sapwood free on working faces.
  • Some resin pockets may be present.
  • UKCA to EN 14915 marked.
  • FSC-certified

General information

Color

Orange

Yellow

Pink

Finish

Brushed

Sawn

Smooth

Material

Timber

Shape

Rectangle

Length

Bespoke

Guidance for specification option:

Up to 4800 mm.

Width

66 mm

73 mm

140 mm

150 mm

Height

25 mm

Uniclass

Ss_25_20_08_95 Weatherboarding systemsPrimary

CAWS

H21/15 Horizontal timber weatherboarding

H21/10 Vertical timber weatherboarding

H21/111 Horizontal timber weatherboarding

H21/115 Vertical timber weatherboarding

Specification data - Weatherboarding systems

Breather membrane

-

Material

Supplied by others.

Guidance for specification option:

For profiles with gaps, manufacturer recommends a UV resistant, black unmarked membrane be specified. Consult manufacturer for further details.

Fasteners

Supplied by others.

Cladding support

-

Counter battens

RWB002 - Thermopine 45 x 20 mm.

Guidance for specification option:

Required.

Manufacturer's standard battening system.

Battens

RWB003 - Thermopine 41/ 46 x 42 mm.

Guidance for specification option:

Required.

Manufacturer's standard battening system.

Fasteners

KompeFix® flexible ventilation strips and GoFix® MS II 5.0 x 120 mm screws with SC 7® coating for load-bearing connections.
F-BohrFix® 3.2 x 40 mm stainless-steel screws for non-load-bearing connections.

Guidance for specification option:

Where components of the system need to be pinned.

Cavity fire barriers

-

Horizontal

Not required.

Securo FIREBREATHER® cavity barrier.

Guidance for specification option:

In the case of a fire, the cavity barrier will instantly seal the cavity and prevent fire spread.


  • Tested according to sudden direct flame impingement ASTM 2912:13.
  • Available with fire rating EI30.
  • Available in lengths: 1130 mm.
  • Depth x height: 23(+3) x 112 (±7) mm.

Vertical

Not required.

Securo FIREBREATHER® cavity barrier.

Guidance for specification option:

In the case of a fire, the cavity barrier will instantly seal the cavity and prevent fire spread.


  • Tested according to sudden direct flame impingement ASTM 2912:13.
  • Available with fire rating EI30.
  • Available in lengths: 1130 mm.
  • Depth x height: 23(+3) x 112 (±7) mm.

Weatherboarding

-

Material

Scotlarch® - Scottish Larch.

Fasteners

L-GoFix® MS A2 stainless-steel screws and KompeFix®.

System accessories

Not required.

KompeFix® flexible ventilation strips (not to be used with Burnblock Fire Treatment).

Securo FIREBREATHER® cavity barrier.

Density

550 kg/m³.

Surface finish

Skimmed.

Guidance for specification option:

  • The face of each board is skimmed to provide a clean, unblemished fine-sawn finish.
  • For Board-on-board.

Board profile

Board on board (BOB).

Reaction to fire

To EN 14915, D-s2, d0.

Guidance for specification option:

When used under the conditions for CWFT.

Euroclass F (Untested).

B-s1, d0.

Guidance for specification option:

When used under the conditions for Burnblock Fire Treatment.

Durability

To BS EN 350, Durability Class 3.

Applied finish

Burnblock Fire Treatment (Euroclass B).

Guidance for specification option:

For Board-on-board (BOB) and RW102.

Burnblock Fire Treatment with SiOO:X (light grey).

Guidance for specification option:

For Board-on-board (BOB). 

Burnblock Fire Treatment with SiOO:X (mid grey).

Guidance for specification option:

For Board-on-board (BOB). 

SiOO (light grey).

Guidance for specification option:

Not recommended on planed surface finish.

SiOO (mid grey).

Guidance for specification option:

Not recommended on planed surface finish.

Show more

Length

Guidance for specification option:

Insert requirements up to 4800 mm.

Depth

22 mm.

Width

150 mm.

Guidance for specification option:

Sawn width (nominal).

73 mm.

Sustainability data

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Material

Timber

Embodied carbon

A1-A3 (production stage) as defined in BS EN 15804

862 kg CO₂ eq/unit

Recyclability

Yes

Third party certifications

BIM objects

BOS

NBS BIM Object Standard

This BIM object has been authored to meet the requirements of the NBS BIM Object Standard.

Find out more about the NBS BIM Object Standard.

Platform Compatible Version
Revit
-

1

IFC
-

1

Third party certifications

Certificate of constancy of performance

Certificate of constancy of performance

Certificate of constancy of performance

EPD

EPD

Scotlarch® sawn or moulded cladding EPD

EPD

EPD

Scotlarch® cladding coated with SiOO:X® EPD

DoP

DoP

Declaration of Performance Scotlarch®

UK Conformity Assessed (UKCA)

UK Conformity Assessed (UKCA)

UK CA Scotlarch®

Literature

102-planed-scotlarch

102-planed-scotlarch

014-planed-scotlarch

014-planed-scotlarch

Assembly instruction FB Cavity Barrier

Assembly instruction FB Cavity Barrier

RISEFR 010-0238

RISEFR 010-0238

Russwood Battening System Factsheet

Russwood Battening System Factsheet

Scotlarch® Factsheet

Scotlarch® Factsheet

Securo FIREBREATHER® Cavity Barrier

Securo FIREBREATHER® Cavity Barrier

Case studies

Little Lindisfarne

Little Lindisfarne

The Seed

The Seed

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