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2021 Lockdown update

Following Government guidelines we are open to service trade customers, who can select and collect timber by appointment. We ask that all visitors wear masks indoors and outdoors when on our premises.

Our customer showroom is closed. For cladding, beams, plank and flooring we can take orders by phone and email. Collections only by appointment. Deliveries are limited to sites with easy access and forklift offload or a minimum of two people on site for manual offload.

Please do not visit our sites without an appointment and a mask.

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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
    VSL1 & VSL2
    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.