Will the slate grey colour fade over time?

Yes, as with all composite decking, you can expect up to 20% fading in the first few months due to UV exposure. This natural weathering process results in a soft, more natural tone, producing a a lighter dark grey appearance.

Is the slate grey grooved decking slippery when wet?

Not at all. The grooved surface offers excellent slip resistance, especially when you use the narrow-groove side, making it safe in all weather conditions.

Can I install slate grey grooved composite decking myself?

Absolutely. Our decking boards are lightweight and grooved for use with a hidden fastener system so there’s no need for visible screws or professional help.

Do I need any special tools to install slate grey decking?

No. Just basic tools like a saw, drill, and tape measure. Follow our simple installation guide and you’ll have your deck up in no time.

Is the slate grey grooved decking safe for kids and pets?

Yes! Our boards are splinter-free, toxin-free, and much cooler underfoot than traditional metal or dark-stained wood decking, so everyone can enjoy long summers outside!

What’s the difference between this and solid decking boards?

Our hollow-core design offers strong performance for domestic use while remaining lighter, easier to install, and more affordable than solid composite decking.

Slate Grey Grooved Composite Decking

One side full view of Anthracite Grey grooved decking

two side view of Anthracite Grey grooved showing the 4 hallows

Same side view of two Anthracite Grey grooved decking boards

single decking board showing wider groove area

Type: Reversible Grooved
Material: Wood Fibre & HDPE Plastic

How Many Slate Grey Boards Do You Need? Calculate Your Area

Colour:

Size:

3.6m

Calculate Your Area

Length (m):

Width (m):

Area

0 m²

Add 5% Cutting Margin (Wastage)

Required Boards:

Total

Quantity

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Add to Cart

£ 19.99

Size

Colour

Clear

SKU: 10570 Categories: Decking, Signature Collection Tags: Easy Care, Lasting Colour, Traditional Design

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Minimal effort, maximum style. Our Slate Grey Grooved Decking Board, part of the upgraded Home Choice Collection, delivers a modern, low-maintenance solution for patios, balconies, and garden spaces. With its on-trend colour and durable four-square hollow core, it’s smartly designed to be lightweight, long-lasting, and budget-friendly.

Featuring reversible grooves for slip resistance and visual variety, this board blends function with form. Crafted from a wood-plastic composite, it’s easy to install with our hidden clip system and engineered to resist fading, warping, and rotting. It’s a clean finish and a calm vibe, simplified. To see how this compares to other popular colours, you can explore our full composite decking range here.

Please Note: Order Your Free Samples

We highly recommend ordering our free samples to confirm the colours before placing an order, as digital photos can vary significantly between screens.

On-Trend Slate Grey Colour

Reversible Grooved Finish

Budget-Friendly Style

Benefits To Our Slate Grey Boards

Stunning Slate Grey

A modern yet versatile shade that suits every garden style, from contemporary courtyards to rustic retreats, this shade does it all!
Incredibly Versatile Size

Not too big, not too small, perfect for creating the outdoor space of your dreams in a garden of any size.
Dual-Groove Design

Two stylish surfaces in one board, so you can switch between wide and narrow grooves depending on your personal preference.
Budget-Friendly

All the premium composite benefits at a price that fits most home improvement budgets.

Length

3600mm
Width

150mm
Finish

Grooved
Thickness

22mm
Colour

Slate Grey
Installation

Grooved (requires decking clips)
Weight (per board)

Approx. 8.7kg
Material

High-Density Polyethylene & Wood Fibre Composite
Warranty

10 Years Residential

Expert Advice for Slate Grey Composite Decking

Want to know more? Our in-house expert, Allan, gives his take on our Slate Grey Composite Decking, and we’ve selected some of our best guides to help you decide if this is the right choice for you.

A Word from Our Expert, Allan:

“Our Slate Grey board is the original in our Home Choice Collection, featuring a distinctive dark grey colour with a slight blue tint. It was created from years of customer feedback and rigorous testing to represent the perfect mix of proven quality and real value. These boards are truly tried and tested—they’ve been out in UK gardens for nearly a decade, so we know they last.

Over those years, we’ve also learned a key secret from our customers. Because of the classic sanded surface, most light scuffs or scratches can be simply blended away with a gentle rub from a soft wire brush. It’s a unique benefit that really helps keep your deck looking great.”

Download PDF

Download PDF

FAQ About Our Slate Grey Composite Boards

1Will the slate grey colour fade over time?

Yes, as with all composite decking, you can expect up to 20% fading in the first few months due to UV exposure. This natural weathering process results in a soft, more natural tone, producing a a lighter dark grey appearance.
2Is the slate grey grooved decking slippery when wet?

Not at all. The grooved surface offers excellent slip resistance, especially when you use the narrow-groove side, making it safe in all weather conditions.
3Can I install slate grey grooved composite decking myself?

Absolutely. Our decking boards are lightweight and grooved for use with a hidden fastener system so there’s no need for visible screws or professional help.
4Do I need any special tools to install slate grey decking?

No. Just basic tools like a saw, drill, and tape measure. Follow our simple installation guide and you’ll have your deck up in no time
5Is the slate grey grooved decking safe for kids and pets?

Yes! Our boards are splinter-free, toxin-free, and much cooler underfoot than traditional metal or dark-stained wood decking, so everyone can enjoy long summers outside!
6What’s the difference between this and solid decking boards?

Our hollow-core design offers strong performance for domestic use while remaining lighter, easier to install, and more affordable than solid composite decking.

As Seen In

Daily new magazine where Ultra Decking is mentioned

Delivery Information

Delivery Type	How Long?	Delivery Cost
Urgent	Estimated 4-7 Days	£149.99
Normal	Estimated 8 to16 working days*	£79.99
Royal Mail Standard (Small Parcels)	3–5 Working Days	£8.00
Royal Mail Standard (Large Parcels)	3–5 Working Days	£29.95
Collection	Collection from our warehouse	FREE
Sample Packs	3–5 Working Days	FREE

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