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Our Wootton Bassett showroom is open for visitors by appointment. 

For cladding, beams, plank and flooring we take orders by phone and email. For collections and self-selected timber please make an appointment. Deliveries are limited to sites with easy access and forklift offload or a minimum of two people on site for manual offload.

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Shiplap cladding

Shiplap claddingShiplap cladding detail

British western red cedar shiplap | VSL1British western red cedar shiplap | VSL1

Shiplap cladding is a machined profile supplied with a smooth finish and an overlapping edge detail to create a waterproof façade. The profile is relatively traditional compared to the more contemporary halflaps and splayed profiles and tends to suit buildings originating in the 1960s and 70s.

The term shiplap is often loosely used to describe various cladding profiles but we use it specifically to describe the true shiplap profile which is also described as a channel profile.

All air-dried species can be machined to shiplap. The most popular choices are cedar  and British oak.

Technical Specification

Profile name Shiplap
Profile code VSL1, VSL2, VSL3
Appearance Classic
Surface finish Planed
Orientation Horizontal or vertical
Location External only
Length Random lengths from 2.0 – 4.0 metres, depending on specie
Depth Overall Width Cover
20mm 95mm 87mm
20mm 120mm 112mm
20mm 145mm 137mm
20mm 195mm 187mm
Depth Overall Width Cover
20mm 95mm 80mm
20mm 120mm 105mm
20mm 145mm 130mm
20mm 195mm 180mm
Profiles VSL1VSL2VSL3
Available in
Larch Delete-icon
Western red cedar Accept-icon
Siberian larch Accept-icon
Canadian western red cedar Accept-icon
Jointed oak Accept-icon
Jointed sweet chestnut Accept-icon
Green oak Delete-icon
Elm Delete-icon
When to fix Year round. Ideally September to March
How to fix VSL1, VSL2 – face fix only. One per fixing board / batten
VSL3 – face fix or secret nail
A gap of 2mm should be left between each board
Begin at the bottom, ensuring that the first board is level with the lap that is adjacent to the wall, pointing upwards. For boards up to 150mm wide, use a single fixing located 25 – 30mm above the lower lap. Never nail through the lap joint. For boards over 150mm, use two fixings, with the second located a further 65 – 75mm above the first to allow for some dimensional movement.Shiplap over 150mm_Face fixShiplap up to 150mm_Face fixShiplap up to 150mm_Secret nail
Batten thickness 35mm
Batten spacing 400 – 500mm
Nail length 50mm
Further information Click here for further fixing advice
Special or bespoke profiles up to 200mm wide can be provided. However, for external cladding, it is generally recommended that boards do not exceed 150mm in width.
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.