Description
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 value—ideal 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 you’re 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) -
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: 3–7 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.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Request Samples
To request samples, please visit this page and fill out your details.
Some of Our Service Reviews
This company deserves more than 5 stars
This company deserves more than 5 stars! Brilliant help & communication by the staff there. My purchase was delivered the next day. can't fault them at all. Thank you
Date of experience: 21 February 2024
Made up with the cladding and…
Made up with the cladding and corrugated roof sheets
Delivered early which was a bonus
All the sheets were not damaged
And l must say cheapest around
Spot on
Will defo use again
Date of experience: 17 October 2023
Cladding
Very pleased with my grey composite cladding. Staff helpful, free samples received, confirming a good product at a fair price, leading to my purchase.
Date of experience: 11 June 2023
Help with my new garage roof!
Trade Warehouse could not have been more helpful. They very patiently guided a roofing newbie through all of the stuff I would need to do the job and provided helpful tips along the way. It's rare to find a company offering such a fantastic level of customer service as standard. I would highly recommend them and will certainly use them again.
Date of experience: 23 August 2023
Garden Storage
My contractor (Charlie Keep) recommended you to me so I could order the materials online for delivery direct to my home. These were for a project to construct a Garden Storage Area. The materials were perfect and the whole process was simple and slick with materials delivered on time and very well packaged. Charlie has since completed the project & I am very happy with the outcome.
Date of experience: 20 August 2023
Right product, right price, right delivery.
Right product, right price, right delivery. Sure, it was only one length of cast iron guttering but they took the order seriously, packed it well and kept me updated on delivery. And when I opened the very good packaging I found it was exactly what I had wanted. How can you do better!!
Date of experience: 31 January 2023
Fast
Fast , efficient service
Date of experience: 12 September 2023
It was exactly what I wanted
It was exactly what I wanted. Arrived in good order
Perfect
Date of experience: 16 September 2023
Straight forward and helpful with…
Straight forward and helpful with making the order. Delivery guy was friendly and was helpful in bringing the sheets into the back yard (was only a few). Really happy and would highly recommend!!!
Date of experience: 27 August 2023
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