Larch

Type: Softwood
Source: Siberia

OVERVIEW

Siberian Larch has a stunning colouring and texture, starting life as a pale yellow/golden brown. Larch is also unique in that it features the shapes and patterns of its growth rings which give a ‘knotted’ wood effect, this means each cladding panel is subtly different and adds a natural character to a building. Larch is well suited to staining and painting, meaning it’s a good choice if you’re looking for an exterior cladding material that can be customised to suit a particular colour or style. Larch is denser than many hardwoods and it provides plenty of strength and durability meaning it is one of the best solutions for external cladding.

Download Datasheet
Suitability of Profiles

Wide choice of standard profiles.

Profile Cladding Joint Horizontal Diagonal Vertical Thickness
Tongue & Groove Closed Yes Yes Yes 20mm min.
Rectangular Closed No No Yes 16-25mm+
Feather Edge Closed Yes No No 9mm x 16-15mm
Shiplap Closed Yes No Yes 18mm
Parallelogram Open Yes No No 16-25mm+
(up to 50mm)
Ecova Clad Profiles Guide
DURABILITY
Desired service life (years)
Natural durability class Need for treatment/modification Occasionally wet Frequently wet
1 (Very durable) Suitable without treatment >60 60
2 (Durable) Suitable without treatment 60 30
3 (Moderately durable) Suitable without treatment except for tall or exposed buildings 30 15 (untreated)
4 (Slightly durable) Treatment required 15-30 years treated 15-30 years treated
5 (Not durable) Treatment required 15-30 years treated 15-30 years treated
Common Name Natural Durability Class BSEN350:2:1994 Sapwood treatability Movement Strength
Larch (European) 3 or 4 Resistant Small Medium
Larch (Siberian) 3 Resistant Small Medium
TREATMENTS & FINISHING
  • Suitable without treatments except for tall or exposed buildings
  • Difficult to treat
Cladding Treatment Notes For which species?
Tanalith (Green) High Pressure Treatment – Green Coloured Finish. Once treated, timber can go in the ground Soft Wood Only
Tanalith (Brown) High Pressure Treatment – Brown Coloured Finish. Once treated, timber can go in the ground Soft Wood Only
Vac – Vac (Clear – Yellowish) Low Pressure Treatment – Green Coloured Finish. Can only use above ground Soft Wood Only
Fire Retardant Pressure Treatment All Species
UV Protection Vacuum Applied All Species
Full Range of Stains and Colours All Species
Clear Lacquer Vacuum Applied All Species
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.

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.