Tongue and Groove Cladding

We offer a select range of tongue and groove cladding profiles in a choice of board widths, suitable for both vertical and horizontal installation. We recommend this type of cladding profile for stable wood species such as Brimstone, cedar and sweet chestnut.






Brimstone, Cedar and Sweet Chestnut


Horizontal / Vertical

What is Tongue and Groove Cladding?

Tongue and Groove is a machined cladding profile supplied with a smooth finish and an interlocking edge detail to create a waterproof façade. This style of cladding board creates a clean linear appearance that is ideal for contemporary new-builds and modern extensions to older properties.
The main benefit of selecting a tongue and groove profile rather than a halflap, is the ability to hide the fixings through the tongue.

Call us to discuss your project


Tongue and groove Cladding from Vastern Timber

Supplied by Vastern Timber

  • VTG1 – VTG6
  • Thickness of 20mm
  • Widths of 70mm, 95mm, 120mm, 145mm
  • Random lengths 1.8mt – 3.5mt+
  • Available in various species
  • Supplied uncoated. No treatment required.


Available in
Brimstone Accept-icon
Oak Delete-icon
Green Oak Delete-icon
Green British Elm Delete-icon
British Sweet Chestnut Accept-icon
British Cedar Accept-icon
Green British Cedar Delete-icon
British Larch Delete-icon
Green British Larch/Douglas Fir Delete-icon
Siberian Larch Delete-icon
Canadian Cedar Accept-icon



Random lengths from 1.8mt – 3.5mt+ depending on specie

Depth Overall Width Cover
20mm 70mm 62mm
20mm 95mm 87mm
20mm 120mm 112mm
20mm 145mm 137mm


Depth Overall Width Cover
20mm 70mm 52mm
20mm 95mm 77mm
20mm 120mm 102mm
20mm 145mm 127mm



How to fix
VTG1, VTG2  – face fix only. One per fixing board / batten.

VTG3, VTG4A, VTG5A, VTG6 – Hidden nail or face fix. One per fixing board / batten.

A gap of 2mm should be left between each board.

Horizontal attachment

Begin at the bottom, ensuring that the first board is level. Orientate the board so that tongue edge is facing upwards. Use a spacer to create a 2mm expansion gap between boards. Fix each board with a single nail at each batten point. Join consecutive board ends over a batten. VTG1 and VTG2 are designed to be nailed through the face of the board. VTG3 and VTG6 can be nailed through the face or diagonally through the tongue to create a hidden fixing.

Vertical attachment

Begin at one corner, with the tongue facing away, ensuring that the first board is vertical. Nail as with the horizontal attachment.


Batten type
Treated softwood. 35mm thick x 50mm wide.

Batten spacing
400 – 600mm.

Nail type
50mm Stainless steel ring shank nail for face fixing.
40mm Stainless steel lost head for hidden fixing.

When to fix
Year round. Ideally September to March.


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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