Cedar 140 x 27mm Smooth

– 140mm x 27mm Western Red Cedar decking boards
– Smooth both sides
– Rich in natural oils
– Features eased edges for a sleek and elegant look
– Can be fitted using Sharktooth hidden deck fastenings or face fixed with stainless steel deck screws

Our Western Red Cedar boards have a smooth finish and a range of colors from pale to light orange, creating a natural look that complements any environment. We custom-cut boards on site to your desired length, using number 2 clear grade cedar with sound knots. Please note boards may be supplied longer than needed, requiring cutting on site.

Our delivery process is designed to be efficient and reliable, ensuring your softwood decking reaches you in excellent condition. Delivery charges are calculated based on your location, the size of the order, and the distance we need to travel. Whether we use trusted external couriers or our dedicated fleet of vehicles, we focus on careful handling of your materials. For detailed information, please visit our Delivery Terms & Conditions.

Softwood decking is versatile and straightforward to install, making it a popular choice for many projects. Depending on the product, installation methods may include traditional stainless-steel screws or secret fixings for a clean finish. Professional installation is recommended for the best results, but if you’re tackling the project yourself, we’re here to provide advice and detailed instructions. Reach out to our team for expert guidance.

Softwood decking is low-maintenance but benefits from regular care to extend its lifespan. Periodic cleaning and the application of a protective wood treatment or stain will help preserve its natural beauty and durability. For tailored advice on caring for your decking, don’t hesitate to contact us—we’re happy to help with any questions you might have.

Overview: Choosing the Right Installation Method

Softwood decking offers an affordable and attractive solution for outdoor living spaces. The installation method depends on your aesthetic preference—face screwing for maximum stability or hidden fastening for a seamless finish. Proper preparation and installation are essential to ensure longevity, weather resistance, and structural integrity.

Preparation and Acclimatisation

Before installation, allow the softwood boards to acclimatise on-site for at least 48 hours. Store them flat, off the ground, and protected from direct sunlight and moisture. Ensure the sub-frame is constructed from pressure-treated softwood joists with adequate ventilation beneath the deck to prevent moisture accumulation.

Fixing Methods

Face Screwing (Recommended)

The traditional and reliable method offering maximum stability. Screw directly through the face of each board into your sub-frame. Always pilot drill before fitting screws and drill holes 2mm oversize to allow for natural expansion. Use corrosion-resistant screws suitable for exterior softwood applications. Each screw hole can be plugged for improved aesthetics.

Hidden Fastening

The Deckwise hidden fastening system provides a seamless, contemporary finish without visible face screws. Each precision-engineered clip screws securely into your sub-frame and slots neatly into the side of adjoining boards, automatically providing consistent spacing. Pre-grooved boards are available, or use a biscuit jointer on site.

Installing Face Screwed Softwood Decking

Face screwing is the recommended method for softwood:

• Always pilot drill before fitting screws to prevent splitting
• Drill holes 2mm oversize to allow for natural expansion
• Maintain 6mm gaps between boards to accommodate seasonal movement
• Use 400mm centre-to-centre joist spacing for optimal support
• Screw holes can be plugged with matching softwood plugs for a neater finish

Installing Hidden Fastening System

For those seeking a clean, uninterrupted deck surface:

• Boards must be pre-grooved or grooved on-site using a biscuit jointer
• Each clip screws securely into the sub-frame and slots into the board edge
• Automatically maintains proper 4mm board spacing
• Creates a professional-grade, seamless finish

Ventilation and Drainage

All softwood decking installations require adequate ventilation:

• Maintain 400mm centre-to-centre joist spacing throughout
• Ensure adequate cross-ventilation beneath the deck to prevent moisture build-up
• Allow for proper drainage to extend the life of your decking

Professional Installation Tools

We strongly recommend using a hardwood decking wrench during installation. This self-locking deck board straightening tool allows you to hold bent boards perfectly straight while fasteners are installed, ensuring a professional finish every time.

Need Help?

While professional installation is advised for best results, we’re here to support DIYers with installation advice and technical guidance. Contact us for tailored support to suit your project.

Overview: Western Red Cedar Decking and Cladding

Western red cedar is renowned for its exceptional natural durability and distinctive rich colouration, combining outstanding stability with timeless aesthetic appeal. Popular for both decking and cladding applications, cedar offers natural resistance to decay and insects thanks to naturally occurring preservative oils called thujaplicins. With proper maintenance, cedar can last for decades, making it an excellent investment for your outdoor and exterior projects.

Natural Characteristics

Western red cedar is naturally durable with excellent decay resistance. This stable, lightweight timber has low shrinkage characteristics and superior dimensional stability compared to many other species. Cedar’s natural resistance to moisture, decay, and insect damage makes it ideally suited for exterior applications:

• Fine, straight grain and smooth texture create a premium appearance
• Low shrinkage and superior dimensional stability
• Naturally occurring thujaplicins provide preservative protection
• Lightweight yet strong for its weight class
• Excellent insulation properties

Weathering and Colour Changes

Understand how cedar naturally ages over time:

• Without treatment, cedar weathers from warm reddish-brown and amber tones to elegant silvery-grey
• UV rays and moisture exposure cause natural colour change over 6-18 months
• Weathered grey patina is considered distinguished and desirable by many
• North-facing surfaces and shaded areas may weather more slowly
• Initial colour variation between boards will gradually even out
• Natural ageing process does not affect structural integrity

Protective Treatments

If you prefer to preserve the original rich colouration of your cedar, protective treatments are highly recommended:

UV Protection Oils

• High-quality penetrating oils provide UV and water protection
• Semi-transparent stains enhance natural beauty while preventing premature greying
• Maintain warm tones and prevent silver-grey weathering
• Reapply every 1-3 years depending on exposure

Clear Water Repellents

• Maintain natural appearance while offering moisture protection
• Allow wood to weather naturally while slowing the process
• Protect against water penetration and staining
• Reapply every 1-2 years

Pigmented Finishes

• Semi-transparent stains enhance grain and character
• Provide robust protection against UV rays and moisture
• Available in natural cedar tones or custom colours
• Longer protection intervals of 3-5 years possible

Initial Treatment (Before or Immediately After Installation)

For best results, treat cedar boards before or immediately after installation:

• Apply treatment to all surfaces including ends, edges, and backs
• Pay special attention to cut ends—seal immediately to prevent moisture ingress
• Choose treatments suitable for your specific application (decking or cladding)
• Allow adequate drying time before exposing to weather or foot traffic
• Treating before installation provides optimal protection

Regular Maintenance Schedule

Keep your western red cedar in prime condition with routine care:

Annual Inspection

• Check for debris accumulation between boards
• Inspect for signs of damage, splitting, or wear
• Ensure proper drainage and ventilation
• Look for mould, algae, or moss growth
• Examine fixings for corrosion or loosening

Periodic Cleaning

• Clean surfaces 1-2 times per year with soft brush and mild detergent solution
• Remove dirt, algae, moss, and organic debris
• Rinse thoroughly with clean water
• Avoid pressure washers which can damage wood fibres
• Allow to dry completely before applying treatments

Treatment Reapplication

• Reapply oils and stains every 1-3 years for high-exposure areas
• Reapply every 3-5 years for protected or low-exposure areas
• Clean surface before reapplication
• Apply in dry, temperate conditions (avoid direct hot sun)
• Follow manufacturer’s coverage rates and application instructions

Ventilation Requirements

Proper airflow is critical for longevity and prevents moisture-related issues:

• Ensure adequate ventilation beneath decking to prevent moisture accumulation
• Maintain minimum 150mm clearance from ground to underside of deck boards
• Install cladding with ventilated cavity using battens or counter battens
• Avoid trapping moisture behind boards
• Use breather membranes that allow vapour transmission
• Keep vegetation trimmed back from timber surfaces

Common Issues and Solutions

Address minor problems before they become major:

Surface Mould or Algae

• Clean with proprietary timber cleaner or diluted bleach solution (1:4 ratio)
• Scrub gently with soft brush
• Rinse thoroughly
• Allow to dry and reapply protective treatment

Greying or Fading

• Clean surface thoroughly
• Lightly sand if necessary to remove weathered layer
• Apply UV-protective oil or stain to restore colour

Splitting or Checking

• Minor splits and checks are natural and do not affect structural integrity
• Seal larger splits with flexible wood filler if desired
• Ensure proper treatment to minimize further movement

Water Staining

• Usually temporary and will blend as timber weathers
• Clean affected areas and reapply water repellent
• Ensure proper drainage to prevent standing water

Longevity and Performance

With proper installation, treatment, and maintenance, western red cedar provides excellent service life:

• Decking applications: 25-30+ years with regular maintenance
• Cladding applications: 30-40+ years or longer with proper care
• Naturally durable heartwood provides inherent resistance
• Regular maintenance significantly extends lifespan
• One of the most reliable and sustainable choices for exterior timber

Professional Maintenance Tips

Optimal maintenance timing is during spring and autumn when weather is temperate. Avoid applying treatments in direct sunlight, extreme heat, or when rain is forecast within 24 hours. Keep records of treatment dates and products used for reference. Consider professional cleaning and refinishing services for large or complex installations.

Need Help?

Western red cedar offers the perfect balance of natural beauty, stability, and performance—providing you with an outdoor space or exterior finish to enjoy for many years to come. For maintenance product recommendations, treatment schedules, or specific care advice, our team is always on hand to assist. Contact us for tailored support to suit your project.