Painting Tongue-and-Groove Panelling in London Homes

Painting Tongue-and-Groove Panelling in London Homes

Tongue-and-groove panelling is everywhere in London right now — and for good reason. Whether it's a classic Victorian-style dado in a hallway, floor-to-ceiling boarding in a bathroom, or half-height panelling in a kitchen, it adds texture, character, and a sense of craft to rooms that might otherwise feel flat. But painted panelling is only as good as the painting itself, and there's more to getting it right than running a roller over some pine boards. Here's what you need to know.

Where Tongue-and-Groove Panelling Works

Bathrooms: This is probably the most popular current application. Full-height or half-height tongue-and-groove in a bathroom creates a clean, period-appropriate look that works in Victorian conversions, Edwardian houses, and modern flats alike. The panelling protects the walls behind it from splashes, and when painted correctly in the right finish, it's a durable surface that cleans easily.

Hallways: A classic application with a long history in British interiors. Dado-height panelling — typically up to about 900mm or the height of a dado rail — in a hallway gives the space a polished, considered quality. In a London Victorian terrace or Edwardian house, it feels entirely period-appropriate while still reading as contemporary when done with confidence.

Studies and libraries: Floor-to-ceiling panelling in a home office or library creates a sense of richness and formality. Painted in a deep, saturated colour, it turns a converted bedroom into something that feels genuinely purposeful.

Kitchens: Tongue-and-groove on the lower portion of a kitchen wall, below the worktop, gives a dresser-like quality that suits both traditional and more contemporary kitchen styles. The finish needs to be practical — easy to wipe down, resistant to moisture and knocks.

Understanding the Substrate: New Timber vs. Existing Painted

The starting point for any tongue-and-groove painting project is understanding what you're working with.

New timber panelling: If the boarding has just been installed, the timber needs to acclimatise before painting — ideally a few days in the room at normal heating levels, to allow any initial movement to take place. New timber should be lightly sanded along the grain, removing any mill glaze that might prevent paint adhesion. Any knots should be treated with a knotting solution to prevent resin bleed. Prime with an appropriate primer before applying finish coats.

Previously painted panelling: If there's existing paint on the panelling, assess whether it's adhering well. Flaking or peeling paint needs to be removed — either by sanding or by careful use of a hot-air gun on areas with a significant build-up of old coats. If the existing paint is sound and well-adhered, it can be lightly abraded and recoated. But if the previous paint has lost adhesion at the groove lines — a common failure point — it needs to be addressed before repainting.

The Groove Lines: Where Everything Goes Wrong

The most common point of failure in painted tongue-and-groove panelling is the groove lines themselves. These narrow channels collect moisture, are difficult to paint thoroughly, and are the first place paint fails — either by lifting, by cracking as the timber expands and contracts, or by showing build-up of previous coats.

Getting the groove lines right means:

Using the right primer: A solvent-based primer, or a high-quality water-based primer with good penetration, reaches into the grooves and seals the end grain at the edges of each board. Cheap water-based primers don't penetrate well and leave the groove areas vulnerable.

Painting into the grooves first: Before using a roller or wide brush on the face of the boards, run a small brush into each groove line to ensure full coverage. It's tedious but essential. A roller applied across the face of the panelling will leave the groove lines thin or missed entirely.

Not over-filling the grooves: Conversely, if you apply too much paint in the grooves — particularly with multiple coats — the paint bridges across the gap and cracks as the timber moves. Apply evenly and thinly rather than trying to fill the grooves with paint.

Sheen Level Selection

This is one of the most important decisions in a tongue-and-groove project, and it varies by location and use:

Bathrooms: The functional requirement for a moisture-resistant, cleanable surface means a higher sheen is appropriate. A satinwood or eggshell finish — in either oil-based or water-based formulation — is the standard choice. Full gloss is rarely used on walls now, but it remains an option in a traditional bathroom where a high-shine look is wanted. We typically recommend a water-based eggshell for most bathroom panelling: less yellowing than oil-based, lower odour, and easier to apply cleanly.

Hallways: A mid-sheen eggshell is the right call — practical enough to wipe down (hallways take a lot of incidental knocks and marks), but not so shiny that it looks hard. Farrow & Ball's Modern Eggshell, Little Greene's Intelligent Eggshell, or Mylands' Eggshell are all excellent products for this application.

Studies and libraries: Where the panelling will have minimal contact with moisture and doesn't need to be wiped down regularly, a dead-flat or soft-sheen finish can be used for a softer, more painterly look. This can be very beautiful in a deep colour on a panelled wall — the low sheen creates depth and warmth that a shinier finish wouldn't.

Product Recommendations

For a bathroom or kitchen application, where moisture resistance is paramount, a two-component water-based satinwood — such as those available from Bedec, Teknos, or Sikkens — offers superior durability over single-component products. These products cure to a harder film and are genuinely water-resistant rather than merely water-tolerant.

For hallways and dry interior applications, Farrow & Ball Modern Eggshell, Little Greene Intelligent Eggshell, or Dulux Trade Eggshell all give excellent results with a proper preparation. The key with any of these is the primer underneath — don't apply them to bare or inadequately prepared timber and expect them to perform.

Getting the Colour Right

Tongue-and-groove panelling creates texture, and texture interacts with colour differently from a smooth flat wall. In general, mid-tone and darker colours look better on panelling than very pale ones — the shadow lines in the grooves are more visible in a pale colour and can look restless. A mid-tone sage green, a warm off-white with a yellow or pink base, a deep navy or charcoal, a dusty heritage blue — these all read beautifully on panelling. Pure brilliant white can work well in the right context, particularly in a bright bathroom, but a warmer off-white is usually more forgiving.

If you're planning a panelling installation and want to discuss paint specification, preparation, or colour, we're happy to advise. We work on panelling projects across London regularly and have strong views on what works and what doesn't.