Siberian Larch Factory Painted UV Light Oak 21x145mm Secret Fix Cladding

Siberian Larch Factory Painted UV Light Oak 21x145mm Secret Fix Cladding

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Including VAT and Delivery

Siberian Larch 21×145 Secret Fix Cladding profile for vertical and horizontal Cladding has factory applied coating to protect the cladding from UV degradation and enhance the look.

The tongue & groove shiplap profile has a shadow gap and unique design to ensure that nails or screws are hidden.

Unique modern design, smooth, clean finish with zero exposed nails speeds up the cladding fitting.

Our slow grown  FSC Certified Siberian Larch is one of the best available in the UK, carefully selected to ensure durability and denseness.



Delivered in 10-14 working days nationwide

Product Description

  • UV protected light oak  Sikkens colour external protective coating
  • Ex 25x150mm Tongue and Groove Secret Fix Shiplap profile
  • Quick and easy to install
  • Planed smooth finish
  • Clean finish – designed to hide nails and screws due to unique Tongue & Groove profile
  • Provides a closed construction
  • Slow grown and selected for durable heartwood
  • Available in long lengths
  • Suitable for diagonal, horizontal and vertical applications
  • Sourced from Sustainable Forests and FSC Certified
  • Meets UK and European Cladding Regulations CE Marked to EN14915, BS1186, BS8605
  • Timber Quality is A/B Grade.

Additional Information

Dimensions 21 × 145 × 4000 mm



Tongue and Groove Shiplap, Viking Secret Fix Profile



1m2 = 8 linear mtrs

Available in more colours



2 Annular Ring Stainless Steel Nails minimum 50mm long or Screws minimum 30mm long for 22mm thick or less cladding

Working Properties

Easy to work


Length Linear Metre Square Metre
4m £5.52 £44.37

Profiles & Downloads

Download Timber Focus FSC Certificate

Download BIM Objects

Our BIM Objects can be downloaded from Bimstore or from NBS National BIM Library. Please feel free to contact us for more information.

Technical Information

Profile           : 39122279
Type              : External Cladding
Nom size      : 21 x 145


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