Cladding

Weatherboards

Aluminum Weatherboard Siding

Features

Overview

Weatherboards brings a timeless, shiplap-inspired profile to Knotwood's cladding range, with the traditional beveled shape, a thicker lower edge and a thinner top edge, that creates a layered, overlapping look across the facade. It's the aluminum version of the classic weatherboard siding that's been used on North American homes for generations.

Where It Fits

Built to Perform

Sizes & Options

Take a Closer Look

Horizontal Install

Each Weatherboard 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

Profiles

Suite

Cladding - Clip
1 3/4"

KACC

Tab - Lock Weatherboard
6"

KECT150W

Tab - Lock
Starter

KECTS

Base Trim
(F)

KECFF

Cover Trim - Small
(M)

KECFMS

Cover Trim
(M)

KECFMM

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

KECFML

Cover Joiner Trim
(M)

KECJM

Base Joiner Trim
(F)

KECJF

Internal Corner Cover Trim - 1"
(M)

KECCMS

Reversible Corner Base Trim
(M)

KECCML

Reversible Corner Cover Trim - Rounded
(F)

KECCF

Cover Corner Trim - 135º
1 3/4" - (M)

KECCMA

Base Corner Trim - 135º
1 3/4" - (F)

KECCFA

Reveal Cover Trim
(M)

KECRM

Cladding - Clip - 1 3/4"

KACC

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PDF

Customization

Downloads

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'

Finish

Traditional Solid Powder Coated Colors or a Sublimated Wood Grain Surface.

Availability

Lead times can vary between 2 to 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 while also engaging a pH-neutral detergent.

Sustainability

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

FAQs

What is weatherboard siding?

Weatherboards is a horizontal board-by-board system that replicates the classic layered look of traditional clapboard siding. The profile copies that aesthetic board for board in a non-combustible aluminum system with the finish applied in the factory rather than on site, so there is no repainting cycle, without the maintenance cycle traditional wood weatherboard siding requires.

What is the difference between aluminum and wood weatherboard siding?

Wood siding rots, splits, cups and requires regular painting, sanding and replacement over the life of a building. Aluminum holds the same classic look without those maintenance demands. It’s non-combustible, corrosion resistant and dimensionally stable, meaning the profile doesn’t expand, contract and degrade the way wood does through heat and humidity. The visual result is the same; the performance over time is significantly different.

Can Weatherboards be used on a weatherboard house renovation?

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

Is it suitable for coastal areas?

Aluminum does not rot or absorb moisture, which is the main thing wood struggles with near the coast. Corrosion resistance itself depends on the finish specification and the exposure rather than on the metal alone, so a beachfront elevation and a site two miles inland are two different specifications. Fastener selection and washdown frequency change as well. Send us the address and the exposure category and our team will confirm what suits and what maintenance goes with it.

What size is Knotwood weatherboard siding available in, and how is it installed?

It comes in a single 6 inch size, supplied in standard 18 foot 6 inch lengths. It uses a tab-lock fixing system: each board hooks onto a Tab-Lock Starter (KECTS) at the base and swings flush against the substructure, secured with a concealed Cladding Clip (KACC). Installation works from the bottom up, one board locking into the next, with Base Trim (F) and Cover Trim (M) closing the perimeter and Reversible corner trims finishing internal and external corners.

What finishes are available for Weatherboards?

The range is available in the full Knotwood finish range, including wood grain and solid powder coated options. The wood grain finish gives a residential facade the appearance of traditional painted or stained wood siding, which is usually the point on a renovation where the character of the house is meant to survive the work. The current U.S. range is set out on our finishes page.

How does it compare to composite siding?

Both aluminum and composite products replicate the traditional weatherboard look without the maintenance. Aluminum is non-combustible, which composite products may not be depending on their composition, a relevant consideration under US building code provisions for external cladding. Aluminum is recyclable, and it does not soften or move the way a polymer-based board can in extreme heat.

Can it be installed over an existing wall or as part of a renovation?

Yes. The tab-lock system installs onto a standard substructure and supports retrofit applications where the existing wall is structurally sound and properly prepared, making it straightforward to update an existing weatherboard or clapboard home without altering the building’s character.

Is Weatherboards siding fire rated?

Aluminum is non-combustible under ASTM E136, so the board does not contribute fuel to a fire. Compliance is never assessed on the aluminum cladding alone, though. The complete wall system, including framing, weather barrier, insulation, fasteners and cavity protection, has to be tested or assessed as a code-compliant assembly under the applicable I-Code as adopted by your jurisdiction. Send us the applicable code and the wall build-up and our team will confirm what test evidence is available for this profile.

What warranty applies to Weatherboards?

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

Why Knotwood?

Locally Made,
Reliable Service

Free Estimations
& Support

Extensive Range of
Wood Grain Finishes

Lunch & Learns
& Educational Support

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samples?

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Aluminum Weatherboard Siding

Features

Take a Closer Look

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Coloring

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Downloads

Specification

Product Details

FAQs

What is weatherboard siding?

What is the difference between aluminum and wood weatherboard siding?

Can Weatherboards be used on a weatherboard house renovation?

Is it suitable for coastal areas?

What size is Knotwood weatherboard siding available in, and how is it installed?

What finishes are available for Weatherboards?

How does it compare to composite siding?

Can it be installed over an existing wall or as part of a renovation?

Is Weatherboards siding fire rated?

What warranty applies to Weatherboards?

Why Knotwood?

Locally Made, Reliable Service

Free Estimations & Support

Extensive Range of Wood Grain Finishes

Lunch & Learns & Educational Support

More on Cladding

Why Aluminum Is Becoming The Preferred Choice for Cladding

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Need More Help?

Want some samples?

Speak with a Knotwood Expert

Need more technical info?

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Locally Made,
Reliable Service

Free Estimations
& Support

Extensive Range of
Wood Grain Finishes

Lunch & Learns
& Educational Support

Want some
samples?

Speak with a
Knotwood Expert

Need more
technical info?