CertiGroove #1 24” Western Red Cedar R&R Machine Grooved

CertiGroove #1 24” Western Red Cedar R&R Machine Grooved

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Certigrade® Blue label product – MACHINE GROOVED #1 24″ R&R Shingles

A standard 24″ Rebutted/Rejointed Shingle with a unique, combed face. Rebutted/Rejointed Shingles are manufactured specifically for exterior and interior wall surface uses. They are a low maintenance product that adds beauty, texture, durability and insulating qualities to either new construction or remodeling and renovation of existing structures. Rebutted/Rejointed Shingles Appearance Manufactured from Number 1 Grade Blue Label red cedar shingles, trimmed for parallel edges with butts sawn at right angles. Available in both sawn and sanded face textures. Length 24-inch; width 4″ minimum; thickness on 24-inch is 4/2″ . Clear heartwood: 100% edge grain; no defects.

Premium Cedar. Low Prices. Home Delivery Made Easy.

Toll Free: 1-877-850-1767

Product Resources:
R&R Grading Rules
Wall Manual
Cedar Shake and Shingle Product Selection Guide
Cedar Shake and Shingle Specification Guide
Basics Guide for Cedar Shakes and Shingles

Recommended Use

For exterior and interior walls where a good quality product is desired.

Coverage

6″ exposure = 18 1/2 sq/ft per box
7″ exposure = 25 sq/ft per box
8″ exposure = 25 sq/ft per box
9″ exposure = 28 sq/ft per box
10″ exposure = 31 sq/ft per box
11″ exposure = 34 1/2 sq/ft per box (Double Course required)
12″ exposure = 37 1/2 sq/ft per box (Double Course required)
13″ exposure = 40 1/2 sq/ft per box (Double Course required)
14″ exposure = 43 1/2 sq/ft per box (Double Course exposure)

Please order an additional 5%-10% to provide for waste, starter courses, and cuts.
Note: Prices are subject to change without notice.

Why Choose CertiGroove 24″ Machine Grooved Western Red Cedar Shingles?

Deep 3/8″ Groove Profile – Creates pronounced horizontal shadow lines for unmatched depth and architectural interest.
100% Heartwood, Vertical-Grain – Zero sapwood, maximum stability, and superior resistance to cupping, splitting, and warping.
Extended 10″ Maximum Wall Exposure – Covers more square footage per bundle (approx. 33–35 sq ft at 10″ exposure vs. 25 sq ft at 7.5″), saving 20–25% on material and labour.
Rich Reddish-Brown Tones – Factory oil-primed or natural; accepts stain beautifully and weathers to elegant silver-gray.
Natural Decay & Insect Resistance – High levels of thujaplicins provide a lifespan of 30–50+ years with minimal maintenance.
Class A Fire Rating Available – When treated with fire-retardant coating (ask about Certi-Guard® options).
Eco-Certified & Sustainable – PEFC-certified, USMCA tariff-free, low carbon footprint.

Premium 24-inch Machine-Grooved Western Red Cedar Shingles – The Ultimate in Texture & Performance

Elevate your exterior with the industry-leading CertiGroove #1 24” Western Red Cedar R&R Machine Grooved shingles from Direct Cedar Supplies. These premium, kiln-dried, 100% clear, vertical-grain, edge-grain Western Red Cedar (Thuja plicata) shingles combine the timeless warmth of red cedar with a deep, consistent 3/8″ machined groove that delivers dramatic shadow lines and enhanced curb appeal—perfect for modern farmhouse, coastal contemporary, Cape Cod, and luxury mountain homes across the USA.

Sourced directly from the finest old-growth mills in British Columbia, every shingle is Certi-label™ #1 Blue Label certified, rebated & rejointed (R&R) for perfectly square edges and butts, and precision-grooved on state-of-the-art equipment for flawless alignment. At 24″ long, these shingles allow greater exposure (up to 10″ on walls), reducing labour costs while creating bolder, more striking patterns than standard 18″ shingles.