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Covid Safety Customer Update

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.

Please do not visit our sites without an appointment.

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Halflap cladding

Halflap cladding (©Michele Panzeri)Halflap cladding detail
Jointed sweet chestnut halflap | VHL6 ©Michele PanzeriJointed oak halflap | VHL5

Halflap cladding is a machined profile supplied with a smooth finish and an overlapping edge detail to create a waterproof façade. The halflap profile creates a clean linear appearance which is ideal for contemporary new-builds and modern extensions to older properties. Halflap cladding can be fixed vertically and horizontally although care should be taken to select the correct profile version (Ref technical page).

Our standard range of halflap profiles offers a choice of shadow gap depth ranging from 2mm to 11mm to suit specific design requirements. Alternatively we can produce bespoke halflap profiles to customer specifications.

All air-dried species can be machined to halflap. The most popular choices are British sweet chestnut, British oak and Canadian western red cedar.

Technical Specification

Profile name Halflap
Profile code VHL1, VHL2, VHL3, VHL4, VHL5, VHL6, VHL7
Appearance Modern / contemporary
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 83mm
20mm 120mm 108mm
20mm 145mm 133mm
20mm 195mm 183mm
Profiles (vertical) VHL1VHL2VHL3VHL4VHL5VHL6VHL7
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 Face fix only. One per fixing board / batten
A gap of 2mm should be left between each board
Profiles (horizontal) Horizontal Attachment
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.Vertical attachmentStart at one corner, with the lap that is adjacent to the wall, facing away. Nail as with the horizontal attachment.Halflap over 150mm_Face fixHalflap up to 150mm_Face fix
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.