Radiata Pine Thermowood Board on Board External Cladding

Our Radiata Pine Thermowood Board on Board External Cladding is board on board cladding in Radiata pine Thermowood, for internal and external use.

About Radiata pine Thermowood

Radiata pine, thermally modified to 4–7% moisture content. Dark brown, weathering to grey/charcoal.

New Zealand radiata pine, Prime grade.

The thermal modification uses only heat and water, so the cladding is chemical free.

Profile and fitting

Board on board uses two widths: the 142 mm boards are fixed underneath and the 70 mm boards go on top. Each 70 mm top board overlaps the 142 mm boards beneath it by 15 mm on each side. Each pair of boards (one 142 mm and one 70 mm) covers 182 mm of wall (142 + 70 less two 15 mm overlaps).

Space the 142 mm under-boards 40 mm apart (70 less two 15 mm overlaps). You see the full 70 mm top board and 112 mm of each 142 mm under-board.

Equal-width option, 142 mm over 142 mm: space the under-boards 112 mm apart (142 less two 15 mm overlaps). Each pair covers 254 mm of wall; you see the full 142 mm top board and 112 mm of each under-board.

Grades and options

• Prime grade (all our radiata is Prime).
• End matching (tongue and groove on the board ends) lets you place joints where they fall rather than on a batten, which speeds up fitting and reduces wastage.

Sizes and pricing

• 142/70 x 20 mm (pair covers 182 mm, 15 mm overlaps): Prime £49.99 / Prime end matched £62.49 per m² ex VAT
• 142 x 20 mm (142 over 142: pair covers 254 mm, 15 mm overlaps): Prime £49.99 / Prime end matched £62.49 per m² ex VAT
• Supplied in random lengths between 1200 mm and 3600 mm.
• Set lengths are available for an extra charge using Set lengths (Cladding): surcharge £8.00 per m² ex VAT up to 3500 mm, £12.00 per m² ex VAT above 3500 mm. Add the same number of m² of set lengths as cladding.

Specifications

Finishing and aftercare

No further treatment is needed. To keep the original colour for longer, use a UV Oil or see our cladding treatments.

Drawings and downloads

Tap the drawing to open it full size.

Tap the drawing to open it full size.

Good to know

• Natural timber varies: expect some differences in colour and grain from board to board and from the photos.
• Thermowood can split, so allow an extra 10% on top of your usual wastage. Knots may remain after planing; they don't affect durability.
• Boards left exposed to changing weather before fitting are likely to cup, warp and split. We suggest fitting between October and April where possible, within 7 to 14 days of delivery.
• Sizes are nominal and can vary slightly with moisture content.
• Not sure? Order up to two cladding samples first.
• Questions? Please contact our Sales Team on 01536 267107.