Description
Naturally durable and visually striking, our 145 x 18mm Western Red Cedar Shadow Gap Cladding is a premium choice for exterior projects. The sleek shadow gap profile delivers a clean, contemporary look while showcasing the rich colour and grain that Western Red Cedar is known for.
Lightweight, stable, and naturally resistant to rot and insects, this cladding performs exceptionally well in exposed environments. The shadow gap profile adds architectural depth, making it ideal for modern homes, outdoor buildings, and feature walls. Left untreated, the timber naturally weathers to a beautiful silver-grey patina, or you can preserve its warm tones with a high-quality protective oil.
Key Facts
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Modern Shadow Gap Profile
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Naturally Durable
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Low Density & Lightweight
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Stable with Minimal Movement
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Versatile for Contemporary Designs
Specification
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Material: Western Red Cedar
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Profile: Shadow Gap
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Width: 145mm
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Thickness: 18mm
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Face Coverage: 135mm
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Grade: No. 2 Clear & Better
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Treatment: Untreated (naturally rot resistant — OSMO recommended for colour protection)
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Finish: Planed Timber
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Lengths Available: 0.9m, 1.2m, 1.8m, 2.4m, 3.0m, 3.6m, 3.9m, 4.2m
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Type: Softwood
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Origin: Canada / North America
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Durability: Class 2
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Movement Class: Small
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Knots: Few
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Colour: Rich red-brown tones that weather to silvery grey
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Modified Timber: No
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Fixings: Stainless Steel
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Recommended Wastage: 10–15%
Key Points
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Naturally durable with excellent resistance to rot and insects
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Lightweight and thermally efficient
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Stable under changing weather conditions
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Smooth planed finish for a premium contemporary appearance
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Suitable for vertical and horizontal installation
Board Run (Important)
It’s important to specify whether your cladding will be installed vertically or horizontally:
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Vertical installation: Water naturally drains downwards; boards are cut with a crisp square shadow line.
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Horizontal installation: Boards are cut with a slight angle in the shadow gap to prevent water trapping and reduce risk of rot.
Other Options
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British Cedar Cladding
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Western Red Cedar 6" x 1" Planed Board
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Western Red Cedar Loglap
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Western Red Cedar T&G 144 x 19mm
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All Shadow Gap Cladding – Shop the range
FAQs
Product
What are Shadow Gap boards typically used for?
Shadow Gap Western Red Cedar is ideal for exterior cladding on modern homes, garden buildings, offices, and feature walls.
Do you offer bespoke lengths?
Yes—custom lengths can be arranged. Contact the sales team.
How long does Western Red Cedar last?
With proper care, Western Red Cedar cladding can last up to 40 years.
Usage
What nails should be used for Shadow Gap cladding?
Stainless Steel fixings are required to prevent staining and ensure longevity.
Can Western Red Cedar cladding be used internally?
It can be, but it is primarily recommended for external projects.
How do I install Western Red Cedar Shadow Gap?
A full, step-by-step installation guide is available. See the Cladding Install Guides page.
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
Read more reviews here.
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