Decking

Interlocking Planks

Aluminum Interlocking Decking Planks

Features

Overview

Interlocking Planks clip together to create a fast, concealed-fix decking installation, the kind of system that gets a deck up cleanly without a surface full of visible fasteners. Each plank locks into the next, building a continuous, considered surface that looks as good as it performs.

Where It Fits

Built to Perform

Sizes & Options

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Interlocking Install

The Starter fixes along the first edge, then the first plank slides into it so its edge is held down and its clip fixes it to the support surface. Each following plank slides into the one before it, locking the join down as it clips into place, repeated row by row until the deck area is complete.

Trims

Slip Resistant Wood grain

Profiles

Suite

Interlocking Plank
6"

KED150

Interlocking
Starter

KEDS

Base Trim
(F)

KECFF

Plank Clip
Interlocking Board

KADC

Cover Trim
(M)

KECFMM

Drilled Infill
3/4"

KEISD

Infill
3/4"

KEIS

Cladding Trim - Top
2 9/16" (M)

KECFML

Plank Trim - Finisher (Hidden)
2" x 2"

KEDAH

Interlocking Plank - 6"

KED150

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Specification

Product Details

Material

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

Country of Origin

United States of America. Sourced and produced through U.S. supply chains, which shortens lead times and reduces exposure to shipping delays.

Length

18.6'

Availability

Lead times can vary between 2 to 4 weeks, depending on the time of year. Contact us for an accurate estimate.

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 Aluminum
Non-Chromate Pre-Treatment
VOC free Powder Coat

Performance Requirements

Fire Standards

ASTM E136.

ASTM E84 Class A.

CAN/ULC-S114.

Structural Design Standards

AAMA 1402.

ASTM E330.

ASCE 7.

Performance Standards

ASTM B221 Aluminum Alloy Extrusions.

AAMA 2604 Metal Finishing Surface Coating.

FAQs

What are interlocking decking planks?

Interlocking decking planks are a decking system where each aluminum plank locks into the next, building a continuous deck surface without exposed fasteners on top. The fixing is concealed within the interlocking joint, so the finished deck has a clean, uninterrupted face. Knotwood’s interlocking planks are extruded aluminum and are available in architectural-grade finishes including sublimated wood grain.

How does an interlocking decking system differ from a standard screwed deck?

A standard screwed deck has visible fasteners driven through the face of each board. An interlocking system hides the fixing entirely inside the joint between planks, so there are no exposed screws on the surface. That removes visual disruption to the finish and eliminates the corrosion risk around surface fixings that comes with years of outdoor exposure. A deck surface without visible fasteners also looks cleaner and is easier to keep clean, with no screw recesses for dirt and moisture to collect in.

Are aluminum interlocking decking planks non-slip?

Interlocking Planks carry a slip resistant coating as part of the sublimated wood grain finish, applied over a powder coat base. It is the only product in the Knotwood range specified with a slip resistant surface rather than a standard powder coat. Where a project has a defined slip resistance requirement, such as a commercial pool surround or a rooftop terrace, contact our team and we will provide the test documentation that applies.

What maintenance do aluminum interlocking decking planks require?

Aluminum decking planks require very little maintenance compared to wood. There is no sanding, oiling, repainting or retreating involved. A periodic wash-down with a soft broom and water, using a pH-neutral detergent, is typically all that is needed to remove dirt, grime and salt residue. The aluminum construction means there is no risk of the planks cupping, swelling, splitting or rotting over time.

Can interlocking aluminum decking planks be used around a pool?

Aluminum decking is a practical choice for pool surrounds and wet outdoor areas. It does not absorb moisture and will not swell, warp or rot when exposed to water, pool chemicals or high humidity, and the finish carries a slip resistant coating. In pool and coastal locations use 316 grade stainless steel fasteners rather than 304, and wash the deck down with fresh water regularly to clear chlorine and salt residue before it builds up on the finish.

What finishes are available on Knotwood interlocking decking planks?

Interlocking Planks are available in sublimated wood grain and solid powder coated finishes. The wood grain option on this product carries a slip resistant coating specific to the decking range. See our finishes page for the current range.

Where can interlocking decking planks be used?

Aluminum interlocking decking is used for residential outdoor decks, alfresco and entertaining areas, balcony flooring, pool surrounds, commercial outdoor dining areas, rooftop terrace flooring and renovation projects replacing an aging wood deck. The concealed-fix system is a strong choice wherever a fastener-free surface finish is the design priority. The aluminum construction also suits coastal environments where salt air would accelerate the deterioration of a wood or steel deck.

How do I install Knotwood interlocking decking planks?

The system is laid over standard joist framing. A Starter profile fixes along the first edge, then the first plank slides into it and clips to the support surface. Each following plank slides into the one before it, locking the join down as it clips into place, repeated row by row until the deck area is complete. Perimeter edges close with Cladding Trim where a plank meets a wall, or a hidden Plank Trim Finisher where the edge is exposed. Board ends are cut to length on site with standard aluminum cutting tools. Joist spacing depends on the span and the loading, so contact our team and we will confirm the supporting structure required.

Does aluminum decking get hot in direct sun?

Any decking surface in full sun gets warm, and aluminum is no exception. Surface temperature comes down mostly to color and exposure rather than the material: darker finishes absorb more heat than lighter ones, and a deck with afternoon shade or a pergola over it runs cooler than one in open sun all day. If the deck is a pool surround or a barefoot area in a hot climate, choosing a lighter finish and planning some shade into the design makes a real difference. Talk to us about finish selection before you specify.

How does interlocking decking compare with composite decking?

Both avoid the sanding, oiling and staining a wood deck needs, but they behave differently over time. Composite boards contain wood fiber, so they absorb some moisture, and they expand and contract with temperature enough that gapping has to be planned for. Aluminum does not absorb moisture at all, will not swell, warp, split or rot, and is non-combustible. The interlocking joint also hides the fixing inside the board rather than relying on a surface screw or a side clip.

Can one damaged plank be replaced?

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

Can interlocking decking be used on a balcony or rooftop terrace?

Yes, and it is a common use for the system. Aluminum is light compared with wood or tile, which matters where the structure has a load limit, and it is non-combustible, which matters on multi-residential and commercial buildings. The supporting structure, the fall for drainage and any waterproofing membrane below all need to be designed for the specific building, so send us the details and we will confirm how the deck should be built up.

Is aluminum interlocking decking non-combustible?

Interlocking Planks are manufactured from 6063 T6 extruded aluminum and are tested to ASTM E136, ASTM E84 Class A and CAN/ULC-S114. That matters on rooftop terraces, multi-residential balconies and any project in a wildfire-prone area, where a combustible deck surface can be the weak point in an otherwise compliant building. Contact our team for the test documentation when a project carries a defined fire requirement.

Why Knotwood?

Locally Made,
Reliable Service

Free Estimations
& Support

Extensive Range of
Wood Grain Finishes

Lunch & Learns
& Educational Support

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Decking

Interlocking Planks

Aluminum Interlocking Decking Planks

Features

Take a Closer Look

Profiles

Customization

Stairs

Pattern

Concealed

Downloads

Specification

Product Details

Performance Requirements

FAQs

What are interlocking decking planks?

How does an interlocking decking system differ from a standard screwed deck?

Are aluminum interlocking decking planks non-slip?

What maintenance do aluminum interlocking decking planks require?

Can interlocking aluminum decking planks be used around a pool?

What finishes are available on Knotwood interlocking decking planks?

Where can interlocking decking planks be used?

How do I install Knotwood interlocking decking planks?

Does aluminum decking get hot in direct sun?

How does interlocking decking compare with composite decking?

Can one damaged plank be replaced?

Can interlocking decking be used on a balcony or rooftop terrace?

Is aluminum interlocking decking non-combustible?

Why Knotwood?

Locally Made, Reliable Service

Free Estimations & Support

Extensive Range of Wood Grain Finishes

Lunch & Learns & Educational Support

More on Decking

Why Choose Aluminum Decking?

Architect-Ready Aluminum Systems with Certified Performance

Crafted Locally, Showcased Globally

Need More Help?

Want some samples?

Speak with a Knotwood Expert

Need more technical info?

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