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Hardie™ Groove Lining

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The Timber Panel Look Without Timber's Problems

Tongue-and-groove timber lining is one of the most enduring interior finishes in Australian residential design. From coastal holiday houses to inner-city apartments, the horizontal or vertical rhythm of narrow timber boards across a feature wall or ceiling creates warmth and character that painted plasterboard never quite matches. The problem is what happens to real timber in that role over time: it moves with humidity, it can split at the ends, it needs periodic sanding and recoating, and it presents a fire compliance challenge in locations where non-combustible materials are preferred or required.

Hardie™ Groove Lining delivers the same visual effect from a fundamentally different substrate. It’s a 7.5 mm fibre cement sheet with 2.5 mm V-grooves carved at 100 mm centres across the face, sanded smooth, ready to paint, and capable of producing a result that’s visually indistinguishable from real tongue-and-groove timber at any viewing distance. Non-combustible, impact-resistant, termite-resistant and Australian-made. CSP Architectural supplies it with a 25-year product warranty.

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Technical Specifications

Installation Guide

Material

Fibre cement – non-combustible, pre-sanded

Thickness

7.5mm

Sheet sizes

2700mm × 1200mm · 3000mm × 1200mm

Groove depth

2.5mm – machined V-grooves

Groove spacing

100mm centres across the full sheet face

Edge detail

Half-groove long edges – butt join creates invisible seam between sheets

Surface

Sanded smooth – site-painted to required colour and sheen

Fire performance

Non-combustible – resistant to fire damage

Moisture resistance

Resistant to moisture damage – does not rot or swell

Termite resistance

Yes – no cellulose content

Impact resistance

Greater than timber – suitable for high-traffic interior areas

Fixing

Gun-nail to timber · Screw to light-gauge steel framing

Suitable applications

Internal walls · Ceilings · Eaves · Soffits · Hallways · Bathrooms excl. showers · Garages

Warranty

25-year product warranty · Australian-made

How the V-Groove Works

The V-grooves in Hardie™ Groove Lining are carved, not printed, not embossed, but physically machined into the face of the fibre cement sheet. Each groove is 2.5mm deep and spaced exactly 100mm apart, creating a consistent linear pattern that reads as a series of individual narrow boards when installed.
The long edges of each sheet have a half-groove profile that aligns with the adjacent sheet when butt-joined; the joint between sheets disappears into what reads as just another groove line. There are no visible joins across a correctly installed groove lining wall or ceiling: just an uninterrupted rhythm of vertical or horizontal lines from edge to edge.

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Groove Lining vs Real Timber - The Practical Comparison

No movement with humidity changes

Real timber boards expand and contract with humidity; a lining that looks perfect in winter can have open joints or bowing boards by summer. Hardie™ Groove Lining is dimensionally stable across humidity and temperature changes. Once it's up, it stays up.

No painting maintenance cycle

Timber groove lining needs repainting every few years to maintain its surface finish, and in humid bathrooms and exposed soffits, even more frequently. Hardie™ Groove Lining holds paint better than timber because it doesn't absorb and release moisture the way wood does, making repaint cycles longer and less frequent.

Non-combustible where timber isn't

In locations where non-combustible lining materials are specified, fire-rated corridors, plant rooms, and commercial interiors with real timber can't be used. Hardie™ Groove Lining achieves the timber panel aesthetic in precisely these locations.

Faster broadwall coverage

Each 1200mm × 2700mm or 3000mm sheet covers a large area in a single fix, with the groove pattern continuing invisibly across the butt join. A real timber groove board installation requires individually fixing every 100 mm wide board, which is far slower, more expensive in labour and more dependent on accurate alignment.

Applications

Residential feature walls

Living rooms, dining areas, entry halls and master bedrooms, wherever a feature wall is part of the design intent, Groove Lining provides the same character as tongue-and-groove timber boards without the movement, splitting and maintenance that real timber introduces in interior conditions. Horizontal or vertical orientation; both read differently and suit different spatial qualities.

Hospitality and commercial interiors

Restaurants, cafes, hotel lobbies and boutique retail spaces regularly use timber groove lining as a warmth element on feature walls and bar faces. Hardie™ Groove Lining delivers the same aesthetic in a product that handles commercial cleaning regimes, high-traffic contact and the general demands of a working commercial environment far better than real timber.

Eaves and external soffits

Hardie™ Groove Lining is suitable for eave and soffit applications; it’s a pre-sanded, moisture-resistant sheet that holds up in exposed locations where real timber groove boards would deteriorate, split and require regular repainting. The product’s impact resistance and moisture performance make it consistently better than real timber in the same applications.

Garages and utility spaces

A groove-lined garage wall is a surprisingly effective design detail, creating a finished, considered look in a space that is often treated as an afterthought. Groove Lining’s impact resistance is particularly relevant in garages where the walls are likely to take contact from equipment, vehicles and general storage activities.

Featured Projects with Hardie™ Groove Lining

Bacchus Marsh Grammar Woodlea Project

Mernda Ambulance Station Cladding Project

The Wickham Duplex Residential Project

Frequently Asked Questions

Can Hardie™ Groove Lining be installed horizontally as well as vertically?
Yes. Hardie™ Groove Lining can be installed with the grooves running either vertically or horizontally; the orientation is a design choice. Vertical grooves create a contemporary, tall-panel timber aesthetic; horizontal grooves read more like traditional horizontal weatherboard or lining boards. Both orientations use the same sheet and fixing method; the difference is purely in the direction the sheet is applied to the framing.
Yes, Hardie™ Groove Lining is suitable for bathroom walls, excluding shower enclosures. For wet area tile substrate applications within the bathroom (shower walls and floor), Villaboard™ Lining is the appropriate James Hardie™ product. On general bathroom walls outside the shower zone, Groove Lining provides a feature lining option that is moisture-resistant and non-combustible.
Hardie™ Groove Lining is supplied pre-sanded and ready for direct paint application without additional priming. A Hardie™ compatible primer is recommended for maximum paint adhesion before the finish coat. The V-groove channels should be painted with care to ensure full coverage in the groove depth; a brush coat into the grooves before roller application to the face provides the best result.
Yes. Hardie™ Groove Lining can be fixed to ceiling framing for feature ceiling applications; horizontal groove lines running across a ceiling create a strong, consistent linear quality. The 7.5 mm sheet weight requires that fixing centres are confirmed against the framing spacing per the James Hardie™ installation guide for ceiling applications.