Waney-edge Cladding

Waney-edge Cladding from Vastern Timber

Supplied by Vastern Timber sales@vastern.co.uk

• Profile code VWE1, VWE2
• Thickness of 19mm or 25mm
• Random widths from 200mm to 350mm+
• Random lengths 1.8mt – 3.5mt+
• Available in Green British larch, Green British cedar, Green oak and Green elm
• Supplied uncoated. No treatment required.

How to fix waney-edge cladding

Inserting fixings through the face of the boards is the only option for waney-edge cladding. Do not try to hide the fixings.  To allow boards to shrink as they dry only use one fixing at each junction of  board and batten .

Waney-edge boards are supplied in various widths. It is advisable to select boards into batches of approximately equal widths before starting. This will help achieve runs of a consistent depth across the building.

Begin at the bottom, ensuring that the first board is level and the waney-edge (bark) is pointing down. Use a 19/25mm strip (depending on the thickness of the board) behind the lower edge of the first board for support. Overlap subsequent boards by 50 – 65mm. It is important not to reduce the recommended overlap. Waney-edge boards are cut from green* (wet) timber and will, as a result, shrink by up to 15mm as the board dries.

We recommend that each board is fixed once with a nail located 10mm above the upper edge of the previous board. Some suppliers advise using two nails per board, but this does not allow for shrinkage of the board and can result in splitting.

End joining of the boards should coincide with a batten and should be staggered to ensure that subsequent boards do not join in the same place.

Recommended battens for waney-edge cladding
Profiled Thermowood or treated softwood battens are recommended for use behind square-edge cladding.

The minimum thickness of primary battens should be 40mm. Horizontal battens to have an angled top face to shed water.

Find out more about our Thermowood batten system

Batten spacing for external timber cladding
400 – 500mm

Fixings for sawn waney-edge cladding
Only use stainless steel ringshank nails for fixing waney-edge cladding.

We recommend 65mm nails for 19mm thick boards and 75mm for 25mm thick boards

waney-edge cladding profiles are not designed to be installed with hidden fixings.

When to fix waney-edge cladding
To avoid excessive distortion, only install Green / fresh sawn cladding during Autumn and winter months. If exposed to hot, dry conditions before or soon after fitting, waney-edge timber cladding is more likely to warp, cup, or split.

Other considerations
It is important to consider the potential dimensional shrinkage and movement of waney-edge cladding boards cut from green / wet timber. Depending on the species, boards may shrink by 10% (20mm for a 200mm deep board) over the first two years as the wood dries.

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.