Decking

Interlocking Planks

Aluminium Interlocking Decking Planks

Features

Overview

Interlocking Planks lock into each other rather than sitting side by side over a visible screw line. A starter profile sets the first edge, each plank slides into the previous one, and a concealed Plank Clip fixes it to the joist below. The result is a continuous deck surface with no fastener heads to catch a bare foot, corrode at the head, or interrupt the run.

Where It Fits

Built to Perform

Sizes & Options

Take a Closer Look

Interlocking Install

A Cladding Trim (F) fixes first against any face that will not be exposed, such as a wall. The Starter then fixes to each joist along the starting edge with a Plank Clip. The first plank slides its edge into the Starter so the side is held down, and once it is straight and aligned, a Plank Clip fixes it to the joist. Every plank after that slides into the previous one and repeats.

Slip Resistant Wood Grain

Profiles

Suite

Interlocking Plank
150mm

KED150

Interlocking
Starter

KEDS

Plank Trim - Finisher (Hidden)
50 x 50mm

KEDAH

Infill
20mm

KEIS

Base Trim
(F)

KECFF

Cover Trim - Large
(M)

KECFML

Plank Clip
Interlocking Board

KADC

Interlocking Plank - 150mm

KED150

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PDF

DWG

Customisation

Stairs

Designed to integrate seamlessly with decking stairways and landings, providing consistent lines and safe, stylish edge protection.

Pattern

Use varied board widths to add character to your design.

Concealed

Enjoy a flawless finish with hidden fixings that enhance the clean lines and premium look of your installation.

Downloads

Specification

Product Details

Material

Tempered Extruded Aluminium Alloy.
*See individual profile specification sheets for exact alloy and temper.

Country of Origin

Australia
Manufactured in Australia and supplied to the UK market.

Length

6500mm

Recommended Supporting Structure Spans

450mm centres, continuous

Availability

Lead times can vary between 2–4 weeks, depending on the time of year. Contact us for an accurate estimate.
Made to Order - 8-20 weeks.

Finish

Sublimated wood grain slip resistant coating over a powder coat base

Warranty Life

Backed by a standard 15 year warranty and up to 25 years on selected finishes.
See our warranty page for the terms.

Maintenance

Periodic washing with a soft broom and water, using a pH-neutral detergent

Sustainability

Recyclable Aluminium
Non-Chromate Pre-Treatment
VOC free Powder Coat

Performance Requirements

Testing Design Standards

CWCT Standards

Fire Standards

Certified A2-s1,d0 to BS EN 13501-1

Structural Design Standards.

BS EN 1999 Eurocode 9, Design of Aluminium Structures

Performance Standards

BS EN 755 Aluminium Alloy Extrusions

BS EN 12206 Powder Organic Coatings

FAQs

What are interlocking decking planks?

Interlocking decking planks lock into each other along their edges rather than sitting side by side over a visible screw line. Each plank slides into the one before it and is fixed to the joist with a concealed clip, so the finished deck surface carries no fastener heads at all.

How does an interlocking system differ from a screwed-down deck?

On a screwed deck, every board is fixed through its face, so the surface shows two screw heads per joist for the length of the deck. Those heads are what catch underfoot, what stain around, and where a timber board starts to split. An interlocking system puts the fixing under the plank, in the joint, so the walking surface stays uninterrupted and there is nowhere on it for water to sit against a fastener.

What does the deck fix down to?

The support structure needs to give the clips something solid to fix into: top hat section, metal hollow sections or timber sections all work. Planks are supported at 450mm centres or continuous.

How are Interlocking Planks installed?

A cladding trim fixes first against any face that will not be exposed, such as a wall. The starter profile then fixes to each joist along the starting edge. The first plank slides into the starter so its side is held down, and once it is straight and aligned it is fixed with a plank clip. Each plank after that slides into the previous one and is clipped down the same way, working across the deck. The perimeter closes with trims, a hidden finisher trim goes on any edge exposed to a pool or garden, and a 20mm infill clips in last to conceal the remaining fixings.

Can Interlocking Planks be used around a pool?

Yes. Aluminium does not absorb moisture, so the planks will not swell, warp or rot the way a timber deck does at a pool surround. A hidden finisher trim closes any edge exposed to the pool, and 316 grade stainless fasteners suit a chlorinated or salt environment.

Will the planks cup, split or need resealing?

No. Aluminium does not move with moisture the way timber does, so there is no cupping, splitting or nail-popping over time. The finish is applied to the metal rather than to the surface, so there is no oiling, staining or resealing in the maintenance cycle. The system carries a 30 year design life.

How do I maintain an aluminium deck?

Periodic washing with a soft brush and water, using a pH neutral detergent. Nothing else.

Are Interlocking Planks suitable for balconies and roof terraces?

The planks sit on a supported substructure at 450mm centres or continuous, which suits balcony and roof terrace build-ups, and the aluminium construction means no moisture movement over an occupied space below. Balconies carry their own requirements on the materials used, which depend on the building’s height and use, so send us the building details and we will confirm what we can supply and provide the classification documentation.

How does aluminium decking compare with composite decking?

Both avoid the sanding and resealing cycle timber needs. The differences are material. Aluminium is extruded rather than moulded, so the plank holds a sharper edge and a more consistent line across a long run, and it does not soften or sag in sustained heat the way a polymer-and-wood-flour board can. It is also recyclable at end of life, where a composite board combining polymer and wood flour is harder to reprocess.

What is the reaction to fire classification of Interlocking Planks?

Interlocking Planks are extruded aluminium, classified A2-s1,d0 to BS EN 13501-1. Under Approved Document B, A2-s1,d0 is a material of limited combustibility. That matters most on balconies and roof terraces, where the materials used in the build-up are governed by the building’s height and use rather than by the decking alone. Contact our team with the building details and we will provide the classification report reference for your specification.

Can a single plank be replaced if it gets damaged?

Yes, though the method depends on where it sits. Because interlocking planks lock into each other, the run is unpicked back from the nearest free edge to reach the damaged board, then relaid the same way. A plank near the perimeter is quick, one in the middle of a large deck means lifting more of the run. Keep a few spares from the original order, since finishes can vary slightly between production batches.

How is water handled under the deck?

Water passes between the planks and needs somewhere to go, so the sub-base has to fall away from the building rather than towards it. Interlocking planks don’t absorb any of it, so nothing swells or rots, but the substructure below still needs to drain and dry. On a balcony or terrace that interacts with the waterproofing below, which is designed for the building rather than supplied with the deck.

What lead times apply?

Interlocking planks are manufactured to order rather than held in every finish, so lead time depends on the finish and the quantity. Standard powder coated colours and wood grain finishes run faster than a bespoke colour. Decking usually sits at the end of a landscaping or fit-out programme, so if the date is fixed, talk to us early and we’ll confirm what’s achievable.

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