Description
Bring durability, style, and long-lasting performance to your outdoor projects with our Pressure-Treated Scandinavian Redwood Shiplap Tongue & Groove Cladding. Precision-machined in-house and produced from joinery-grade slow-grown redwood, this profile offers the perfect combination of strength, weather resistance, and a clean, premium finish.
Designed with a Tongue & Groove shiplap profile, each board interlocks seamlessly, creating a secure, tight-fitting exterior that enhances structural protection while delivering a neat, professional appearance. Ideal for sheds, summerhouses, garages, workshops, garden buildings, playhouses, and more.
Every board is green pressure treated for long-term resistance against rot, fungal decay, and moisture, and is backed by a 15-Year Treat Right Warranty—giving you confidence in its durability for years to come. With its smooth planed surface and consistent high-quality machining, this cladding is a favourite for trade and DIY projects alike.
Why Choose This Redwood Shiplap T&G?
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Joinery-Grade Scandinavian Redwood – slow grown for strength and stability
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Pressure Treated for Longevity – ideal for exposed outdoor environments
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Precision Tongue & Groove Profile – boards interlock for a clean, secure finish
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Machined In-House – consistent quality and smooth planed finish
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15-Year Warranty – reliable, long-lasting performance
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Free Samples Available – see the quality before you buy
This profile is perfect for anyone wanting a smart, durable cladding solution with an excellent lifespan and classic shiplap appearance.
Matching Redwood Profiles Available
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Shiplap Treated Redwood – 150mm x 15mm
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Shiplap T&G Treated Redwood – 121mm x 14.5mm
Specifications
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Weight: 1.35kg
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Width: 121mm (Finished Size)
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Thickness: 14.5mm
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Face Coverage: 115mm
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Lengths:
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15cm Sample
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1.2m (4ft)
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1.8m (6ft)
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2.4m (8ft)
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3.0m (10ft)
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3.6m (12ft)
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Timber: Scandinavian Redwood
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Finish: Planed Smooth
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Treatment: Green Pressure Treated
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Warranty: 15-Year Treat Right Warranty
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Maintenance & Installation: Advice available online
Frequently Asked Questions
1. What is Shiplap T&G cladding?
Shiplap T&G combines two profiles—shiplap overlap and tongue & groove interlocking—to create a tight, weather-resistant joint. The overlap provides extra water protection, while the T&G fit gives a smooth, seamless appearance.
2. Is this cladding suitable for exterior use?
Yes. The boards are fully pressure treated, making them ideal for sheds, summerhouses, garages, workshops, garden rooms, and other outdoor structures.
3. How long does pressure-treated redwood cladding last?
When installed correctly, it can last 15 years or more, supported by the included 15-Year Treat Right Warranty.
4. Does the cladding require additional treatment?
Pressure-treated boards do not require extra treatment for protection, but applying a UV oil or stain will help maintain the natural colour and reduce silvering.
5. What fixings should I use for installation?
Use stainless-steel nails or screws to prevent corrosion, staining, and chemical reactions with the treatment.
6. Can this Shiplap T&G be used indoors?
It can be used indoors, but it is primarily designed for exterior cladding due to the pressure treatment and weatherproof profile.
7. How do I install Shiplap Tongue & Groove cladding?
Boards should be fitted horizontally with the tongue facing upward. Secure each board into treated battens and maintain correct expansion gaps. A full installation guide is available for step-by-step help.
8. Can I cut the boards to custom lengths?
Yes. Boards can be cut on-site, and bespoke lengths can be supplied on request (additional charges may apply).
9. Will the timber change colour over time?
Yes. Pressure-treated redwood naturally weathers to a soft, silvery tone. UV protection can slow this process if a fresher colour is desired.
10. What is this profile typically used for?
This profile is widely used for:
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Garden sheds
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Summerhouses
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Garages and workshops
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Gates and fencing panels
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Decorative exterior cladding
Payment & Security
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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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