Redwood Thermowood Shadow Gap Cladding 142mm x 20mm

Our carefully machined Redwood Thermowood Shadow Gap Cladding is the perfect choice should you require a clean linear appearance, impeccable weather protection, along with the added durability and stunning grain of Scandinavian Redwood Thermowood.

Available in Character and First Grade as well as the option for End Matching (Tongue and Groove)

142mm x 20mm


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Our Scandinavian Redwood Thermowood Shadow Gap Cladding is the perfect cladding to use both internally and externally. Boasting a rich golden brown colour that fades into a dark grey/charcoal colour, it is a minimalistic and modern solution to cladding without the need for extra oiling and painting to achieve its aesthetic. UV oil can be used to preserve the golden brown colour if you wish. 

Even though no additional treatment is required to Thermowood, as it is a modified wood that has been treated by heat in a kiln in high temperatures, it can be easily stained just like a normal planed softwood. This process dries out the core of the wood, getting rid of any moisture and resin within the board and brings the moisture content to around 7-10% with enhanced physical properties, making it much more stable than any other softwood. The process also means it has high resistance to decay and fungal attacks. As the drying process involves heat and water, this means that the cladding is chemical free and therefore a eco-friendly option to use compared to some of the other materials on the market.

Redwood Thermowood can be knotty naturally even after planing though it doesn't affect the material's durability, though we do advise that you should allow an extra 10% on top of usual wastage amounts as the kiln drying process can mean the cladding is prone to splitting. This does not affect the integrity of the cladding but it is something that needs to be taken into consideration as with all kiln dried softwoods.

Ready to fix and available in two options - First and Character Grade:

  • First Grade is sorted to include only the clearest (most knot free) boards with the straightest grain possible. A perfect choice for all modern and contemporary applications.
  • Character Grade will have a mixture of all top four grades, 1 through to 4 - some clear of knots and some straight grain, others with knots and some sloping grain. A perfect choice for all traditional/rustic applications, it gives a less uniformed look, without compromising its excellent durability properties.

End-Matching (Tongue and Groove) will allow you to place joints where they fall, instead of on the stud, allowing you to finish the job more quickly without sacrificing on quality and helps minimise wastage.

We offer the following section sizes:

  • 142mm x 20mm - The overall width is 142mm, with the visible face measuring 122mm with 36mm tongue and square edges.

Priced per square metre and supplied in random lengths between 1200mm and 3600mm unless otherwise specified for an additional charge:

  • Set lengths up to 3500mm - £4.00 extra per square metre exc VAT
  • Set lengths above 3500mm - £8.00 extra per square metre exc VAT

The visible face size is 20mm less to account for the joint and the namesake shadow gap which measures at 16mm. Please note that the sizes are nominal and may vary slightly.

If your boards are exposed to varying weather conditions before fitting, they are likely to cup, warp and split; the ideal time to fit cladding to keep this to a minimum is between the months of October and April and within 7 to 14 days of delivery.

Please be aware that sizes are subject to change in response to changes in moisture levels. Cladding will be kiln-dried to approximately an 7-10% moisture content prior to machining, but may vary between production and installation on site. Cladding will be dispatched at given sizes, but a margin of error should be used when producing cladding layout drawings for expansion and contraction in the timber.

Please contact our Sales Team on 01536 267 107 should you have any issues.

Still unsure? We offer up to two samples of our cladding boards for a £5 inc VAT postage charge. Should you wish to then purchase cladding boards that are the same product as your samples, we will reimburse you the £5 postage charge upon ordering!*

*Terms and Conditions apply

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