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We have put together a concise guide to enable you to compare cladding features in order to ensure that you select the appropriate species for your project. To find out more about each product, simply click on the product name at the top of the table.

  Scotlarch® SILA A/B® and SILA A+ Thermopine®  Vertical Grain Siberian Larch Architect Select® WRC Accoya® wood
Species Scottish Larch Siberian Larch   Scots Pine Siberian Larch Western Red Cedar Radiata Pine 
Origin Scotland Russia Northern Scandinavia  Russia North America New Zealand/Chile
Density* (Kg/m3 at 18% moisture content unless otherwise stated)

556

Medium density

628

Dense

450 (at 10%)

 Low density

628

Dense

381

Low density

592 (at 8%)

Medium density

Durability Class* (1 is 'Very Durable' > 5 = 'Not Durable' 3 3 3 2 1
Stability Good Good Very good  Very good Very good Excellent
Presence of Knots Many Some Many  Some Very few Very few
Suitability for Factory Coating Moderate (sawn-face recommended) Good Very good  Good Very good Excellent (opaque recommended)
Fire-Retardant Coating Possible Yes Yes Yes  Yes Yes Yes
Environmental Certification FSC® FSC® PEFC  FSC® PEFC FSC® & PEFC
Modified Timber No No Yes  No No Yes
Lengths (m) Up to 4.8m Up to 6.0m Up to 5.4m  Up to 5.1m Up to 5.7m Up to 4.8m
Stock Sawn Width (mm) 75 - 150 75 - 225 125 or 150  92 100 or 150 100 - 200
Indicative Price Range (per m² excluding VAT) **
£21 - 39 £28 - 40 £25 - 39  £46 £65 - 90 £59 - 72

** Please note that prices are subject to change due to the fluctuating prices of timber and the figures above should be used as a guide only. Prices are based on a minimum quantity of 50  and uncoated, coatings add an additional cost of circa £18-20 per m²

Dualchas Architects
Russwood provide a consistent good service and product for architects which gives them confidence when specifying. This ranges from advice on detailing and product selection through to after sales advice to customers. Architects jobs are made easier when both contractor and suppliers work as a team to provide great buildings – Russwood are very much team players and are an important component in the increasing amount and quality of timber-clad buildings being built in Scotland.

Neil Stephen, Dualchas Architects