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Green British Larch / Douglas Fir Cladding

Sawn from locally grown trees, larch and Douglas fir are tough and naturally durable softwoods, ideally suited to rustic barn conversions. Sold ‘green’ or freshly sawn this type of cladding is our most cost effective solution.

Style

Rustic

Profiles

Feather-edge and waney-edge

Source

England and Wales

Beware

Shrinkage

Green British Larch / Douglas Fir Cladding Features

Because British larch and Douglas fir are so similar and because larch is becoming scarce, we now offer the two species as a single product. The choice of specie will be determined by our stock levels at the time of cutting although you will only receive one specie in your order. If you are adding to a previous order we will endeavour to offer the same specie.
Green larch / Douglas fir cladding is both tough and durable, making it ideal for exposed elevations and areas where knocks and scrapes are likely. Sawn straight from the log this cladding option is our simplest and cheapest.
The term ‘green ‘ means that the boards are cut directly from the tree and are not dried before delivery. Other terms used are fresh-sawn and wet. This traditional method of producing larch / Douglas fir cladding larch is well suited to sawn profiles such as feather-edge and waney-edge.
Being wet this type of larch will shrink after installation and it is very important to follow our fixing guide to avoid problems as the boards dry.
For a comparison between British and Siberian larch watch our video

Call us to discuss your project

Specification

Green British larch cladding from Vastern Timber

  • British larch / Douglas fir
  • Larix decidua / Pseudotsuga menziesii
  • Legal and well-managed forests in England and Wales
  • Supplied by Vastern Timber (sales@vastern.co.uk)
  • Grade : Grade B BS1186-3 1990 Class 3 / EN942:2007 J50
  • Random lengths 1.8mt – 4.0mt+, allowing small % down to 1.5mt
  • Available in feather-edge and waney-edge profiles
  • Supplied green / wet
  • Durability EN350-2 Moderately Durable. Class 3
  • Supplied uncoated. No treatment required.

Characteristics

Appearance

British larch / Douglas fir ranges in colour from pinky-brown in the heartwood, to cream in the sap band. Boards will contain regular knots. Cladding boards may cup a little as they shrink.

Weathering
Larch / Douglas fir weathers relatively slowly, often taking two years to reach a silver-grey patina. Larch is quite consistent and is not reactive, and as such, will weather relatively evenly. Northerly elevations may weather to a darker grey than those facing South.

Desired service life
Occasionally wet 30 yrs. Frequently wet 15 yrs.

Movement class
Large 

Resistance to impact
High

Working properties
Good workability. Takes fixings satisfactorily although can be prone to splitting.

Density
570 – 650 Kg / m3

Extractives
British larch contains resin rather than oil or tannin. The resin is sticky and may ooze from boards for a few years after installation. The resin is not reactive.

Installation

How to fix
Pre-drill and hand nail with stainless steel nails through the face or use a first fix nail gun. Only nail each board once per batten.

For more information, visit the resource centre

Batten type
50mm thick x 50mm wide treated softwood.

Batten spacing
400 – 600mm

Nail type
Stainless steel only. 65mm / 75mm ring shank nails.

When to fix
Autumn and winter months. Installing fresh sawn larch during warm months is not advisable. 

Resistance to fixing
Medium

Profiles

We produce timber cladding to the profile of your choice. View our full range of cladding profiles

We recommend the following profiles for British larch / Douglas Fir.

Disclaimer

While the utmost care has been taken to provide accurate information, Vastern Timber shall not be held responsible for any consequences arising from any errors or omissions on this website nor for any damages resulting from the use of the information.

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