Achieve a strong, clean, and durable finish on any outdoor project with our Pressure-Treated Scandinavian Redwood Shiplap Cladding. Machined from premium joinery-grade redwood, these boards offer the perfect balance of quality, longevity, and valueideal for sheds, summerhouses, garages, workshops, playhouses, and exterior walls.
Each board is smooth planed for a refined appearance and is green pressure-treated to provide long-lasting protection against rot, fungal decay, and insect attack. The shiplap profile features a subtle overlap that creates a tight weather-resistant seal, improving strength, rigidity, and water runoff.
Backed by a 15-year Treat-Right warranty, this cladding offers peace of mind for long-term exterior performance. Whether youre a tradesperson or DIY builder, these boards are made to install easily and deliver a clean, uniform finish for any project.
Key Features
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Joinery-Grade Scandinavian Redwood slow-grown, stable, and high quality.
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Pressure Treated with Tanalith Green deep preservative protection for outdoor use.
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Smooth Planed Finish clean, attractive appearance suitable for modern and traditional builds.
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Perfect for Sheds & Garden Buildings lightweight, durable, and easy to install.
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Long-Term Reliability includes a 15-Year Treat-Right Warranty.
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Free Samples Available see the finish and quality before ordering.
Specifications
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Width: 119mm (5″)
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Thickness: 12mm
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Face Coverage: 110mm
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Length Options:
15cm Sample
1.8m (6ft)
2.4m (8ft)
3.0m (10ft)
3.6m (12ft)
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Timber Type: Joinery Grade Scandinavian Redwood
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Finish: Smooth Planed
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Treatment: Green Pressure Treated
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Warranty: 15-Year Treat Right Warranty
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Weight: Approx. 0.9kg per board
Ideal Uses
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Sheds & garden buildings
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Summerhouses & playhouses
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Workshops & garages
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Exterior house walls (partial or full)
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Decorative outdoor panels
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Timber fencing & small joinery projects
Why Choose Treated Redwood Shiplap?
Redwood is a strong, stable, slow-grown softwood, making it perfect for cladding exposed exterior structures. The pressure treatment ensures long-term resistance to moisture and decay, while the overlapping shiplap profile provides an effective weatherproof seal.
The lightweight design also makes it easy to handle and install, while still offering excellent rigidity and structural support.
Delivery & Samples
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Free sample boards available (limit per order).
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Delivery times: 37 working days depending on stock and location.
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Delivery costs shown at checkout.
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Bespoke cutting available on request (additional fee).
Product FAQs
1. What is shiplap cladding?
Shiplap cladding consists of boards with a rebated edge that overlap during installation. This overlap creates a tight, weather-resistant seal that effectively sheds water while producing a clean, uniform appearance.
2. Is this redwood shiplap suitable for exterior use?
Yes. The boards are green pressure-treated, making them ideal for exterior projects such as sheds, garages, summerhouses, and outdoor walls.
3. How long will treated redwood shiplap last?
When installed correctly and maintained as needed, this cladding can last 15 years or more, supported by the 15-Year Treat Right Warranty.
4. Does the shiplap require additional treatment after installation?
While the boards are already pressure-treated, applying a UV-protective oil or stain can help maintain colour and extend lifespan, especially in exposed areas.
5. What fixings should I use with this cladding?
Use stainless steel nails or screws to prevent rusting or black staining caused by reactions between timber tannins and mild-steel fixings.
6. Can treated redwood shiplap be used indoors?
It can be used indoors, but it is primarily designed for external applications. For indoor decorative use, ensure adequate ventilation due to the preservative treatment.
7. Can boards be cut to size?
Yes. Boards can be cut on-site, and bespoke cutting can be arranged for an additional fee. For custom lengths, contact the sales team.
8. What is the face coverage of each board?
Each 119mm x 12mm shiplap board provides 110mm face coverage once installed, accounting for the overlap.
9. How do I install shiplap cladding?
Install boards horizontally, starting at the bottom. Ensure the rebated edges overlap correctly and fix through the thickest section of the board into the battens. Full installation guides are available for reference.
10. Do you offer sample boards?
Yes. Free sample boards are available (limit two per customer), allowing you to check the finish, colour, and quality before placing an order.
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