Cladding

Weatherboard

Aluminium Weatherboard Cladding

Features

Overview

Aluminium weatherboard cladding replicates the horizontal, shiplap-inspired profile of traditional timber weatherboards in an extruded aluminium board. Knotwood’s Tab-Lock Weatherboard gives homeowners and builders that look without the cycle of painting, sanding and replacing the timber version demands. Available in a 150mm board, suited to full elevations and renovations alike.

Where It Fits

Built to Perform

Sizes & Options

Take a Closer Look

Horizontal Install

Each Weatherboards board hooks onto a tab-lock starter at the base and swings flush against the substructure, secured with a concealed cladding clip. Installation works from the bottom up, one board locking into the next, finishing with a cover trim pressed over the base trim to close the perimeter.

Starter

Trims

Corners

Profiles

Suite

Tab - Lock Weatherboard
150mm

KECT150W

Tab - Lock
Starter

KECTS

Base Trim
(F)

KECFF

Cover Trim - Small
(M)

KECFMS

Cover Trim
(M)

KECFMM

Cover Trim - Large
(M)

KECFML

Cover Joiner Trim
(M)

KECJM

Base Joiner Trim
(F)

KECJF

Internal Corner Cover Trim - 25mm
(M)

KECCMS

Reversible Corner Base Trim
(M)

KECCML

Reversible Corner Cover Trim - Rounded
(F)

KECCF

Cover Corner Trim - 135º
45mm - (M)

KECCMA

Base Corner Trim
135º (F)

KECCFA

Reveal Cover Trim
(M)

KECRM

Cladding - Clip
45mm

KACC

Tab - Lock Weatherboard - 150mm

KECT150W

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Specification

Product Details

Material

6063 T6 Temper Extruded Aluminium Alloy.

Country of Origin

Australia.

Australian resourced and produced from local supply chains, which adds to our quality and minimises disruption from logistics and manufacturing delays.

Length

6500mm

Finish

Traditional Solid Powder Coated Colours or a Sublimated Wood Grain surface.

Availability

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

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

Fire Standards

AS 1530.1-1994 - Combustibility testing for materials.

AS/NZS 1530.3-1999 - Methods of fire testing on materials.

AS 3959 (BAL40) - Building construction in bushfire prone areas.

Performance Standards

AS/NZS 1866 - Aluminium alloy extrusions.

AS 3715-2002 - Metal finishing surface coating.

FAQs

What is aluminium weatherboard cladding?

Aluminium weatherboard cladding is an aluminium cladding profile that replicates the horizontal, overlapping look of traditional timber weatherboards. Each board locks into the one below it, so the finished wall reads as a classic weatherboard elevation while behaving like aluminium: non-combustible, non-warping and with no painting or resealing cycle. Knotwood supplies it as the Tab-Lock Weatherboard in a 150mm board.

What is the difference between aluminium weatherboards and timber weatherboards?

Timber weatherboards rot, split, cup and require regular painting, sanding and replacement over the life of a building. Aluminium weatherboards hold the same classic look without those maintenance demands. They are non-combustible, corrosion resistant and dimensionally stable, so the profile does not expand, contract and degrade the way timber does through Australian heat and humidity.

How does aluminium weatherboard cladding compare to composite?

Both aluminium and composite weatherboard products replicate the timber weatherboard look without the maintenance. Knotwood’s aluminium profiles are non-combustible, which is a relevant consideration under the National Construction Code provisions for external cladding, and aluminium is recyclable at the end of its service life. Composite products vary by manufacturer and composition, so compare the two on the specifications for the products you are considering.

Is aluminium weatherboard cladding suitable for coastal areas?

Aluminium is corrosion resistant, which is why it is commonly specified near the coast where salt air accelerates the deterioration of steel and untreated timber. How a finish performs depends on how close the site is to breaking surf, the exposure of the elevation and the cleaning regime, and marine-grade stainless fasteners are required within 1km of the ocean. Send us your site location and we will confirm the right finish and the maintenance schedule for that exposure.

What warranty does Knotwood weatherboard cladding come with?

Knotwood weatherboard cladding carries a powder coat warranty to AS 3715, and the term depends on the finish you specify. Woodgrain finishes use Interpon D STF and carry up to 15 years. Standard colours carry 10 years on Interpon D1000, or 25 years on Interpon D2525, the ultra-durable coating used on prestigious commercial and high-rise projects. All warranties must be registered to take effect. Full terms and the registration form are on our warranty page.

How much does aluminium weatherboard cladding cost?

Knotwood does not publish fixed pricing, because cladding is quoted on specification. The main variables are the finish, the total area and the trims the detail requires. Weatherboards use a tab-lock starter plus base, cover and corner trims, and those matter to the final figure as much as the boards do. Send us your elevations and we will quote it.

What are the dimensions of Knotwood aluminium weatherboards?

Weatherboards come in a single 150mm board size, supplied in 6500mm lengths. Boards install with a tab lock fixing system, so there are no visible fasteners on the finished face.

What finishes are available for Knotwood aluminium weatherboards?

Weatherboards are available in traditional solid powder coated colours and in a sublimated timber grain surface, the same architectural-grade finish range used across the Knotwood aluminium cladding range. That means Weatherboards can be specified alongside other Knotwood profiles on the same facade with a consistent finish. The full range is on our finishes page.

How is aluminium weatherboard cladding installed?

Each board hooks onto a tab lock starter trim at the base and swings flush against the substructure, secured with a concealed cladding clip. Installation works from the bottom up, one board locking into the next, finishing with a cover trim pressed over the base trim to close the perimeter. Reversible corner trims handle both internal and external corners. Substrate types, batten spacing and the full installation guide are in our resources section.

Can aluminium weatherboard cladding be installed over existing weatherboards?

In many cases, yes. Because the system fixes to a substructure rather than directly to the wall, aluminium weatherboard cladding can often go over an existing weatherboard exterior without stripping it back, which is why it suits renovation work on older homes. What matters is whether the existing boards and the structure behind them are sound and able to carry the substructure and the new cladding, and whether the wall is straight enough for the substructure to be packed true. Have the existing wall assessed before you order, and send us the detail so we can confirm the right fixing method for it.

Can aluminium weatherboards be used on a weatherboard house renovation?

Yes. Knotwood’s aluminium weatherboard profile is designed as a direct replacement or match for traditional timber weatherboards, making it a strong choice for renovations where the brief is to update a weatherboard home without changing its character. The profile replicates the layered weatherboard look, so new sections match the existing exterior visually while adding the low-maintenance and non-combustible performance of aluminium.

What maintenance does aluminium weatherboard cladding need?

Very little, which is the main reason people move off timber. There is no painting, sanding or resealing cycle at any point. Periodic washing with a soft broom, water and a pH neutral detergent is all that is required, and more often on coastal installations to clear salt deposits before they sit on the finish. Avoid abrasive pads and solvent-based cleaners, since those can mark the powder coat. Compared with a timber weatherboard house, which typically needs repainting every several years and board replacement over time, the ongoing cost sits close to zero. Clearing debris from around the base trim once a year keeps water draining the way it is meant to.

Why Knotwood?

Locally Made.
Reliable Service

Free Estimations
& Support

Extensive Range of
Wood Grain Finishes

CPDs & Educational Support

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Aluminium Weatherboard Cladding

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Specification

Product Details

Performance Requirements

FAQs

What is aluminium weatherboard cladding?

What is the difference between aluminium weatherboards and timber weatherboards?

How does aluminium weatherboard cladding compare to composite?

Is aluminium weatherboard cladding suitable for coastal areas?

What warranty does Knotwood weatherboard cladding come with?

How much does aluminium weatherboard cladding cost?

What are the dimensions of Knotwood aluminium weatherboards?

What finishes are available for Knotwood aluminium weatherboards?

How is aluminium weatherboard cladding installed?

Can aluminium weatherboard cladding be installed over existing weatherboards?

Can aluminium weatherboards be used on a weatherboard house renovation?

What maintenance does aluminium weatherboard cladding need?

Why Knotwood?

Locally Made. Reliable Service

Free Estimations & Support

Extensive Range of Wood Grain Finishes

CPDs & Educational Support

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Trusted, Tested, Compliant - Knotwoods CodeMark Certification

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Want some samples?

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Need more technical info?

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