Contrast and texture in the interior: How to combine mouldings, 3D pan

Contemporary interior design is moving away from uniformly subdued, flat arrangements towards compositions built around contrast, texture and geometry. The key to achieving a balanced effect is not oversized furniture, but carefully selected finishing details. Combining classic wall moulding, three-dimensional decorative panels and bold black accents creates architectural depth while maintaining complete visual cohesion throughout the room.

1. A bold floor finish: Black skirting board

A skirting board serves a practical purpose: it conceals the expansion gap and protects the bottom of the wall from mechanical damage and dirt. Choosing a model in a deep matte black turns a purely functional element into a striking compositional foundation. Its tall profile (99 mm) visually separates the floor from the wall, tying together other black accents in the interior, such as window frames, light fittings or a table base.

Recommended product: PS skirting board 99x16mm L-2.44m black RAL9005

Material: High-density polystyrene (PS / HDPS)
Dimensions: 99 mm (height) x 16 mm (width) x 2440 mm (length)
Finish / Colour: Matte black (RAL9005)
Features: Impact-resistant, waterproof, with space to conceal wiring

💡 Installation tip: To maintain an unbroken black finish line at corners, cut the skirting board at a 45° angle using a mitre box and a fine-toothed saw, and apply a dedicated hybrid adhesive with high initial bond strength.

2. Geometry and rhythm on the wall: Classic moulding

Creating frames with wall mouldings on plaster (a modern take on so-called English panelling) is an effective way to break up the monotony of smooth surfaces. A smooth, raised profile 40 mm wide helps organise the space: it defines areas for pictures or wall lights, or creates a backdrop for lounge furniture.

Made from polystyrene with a primed finish, the moulding can be painted exactly the same colour as the wall, creating a subtle play of light and shadow without introducing additional colours.

Material: Polystyrene (PS)
Dimensions: 40 mm (width) x 20 mm (thickness) x 2440 mm (length)
Finish: Matte white primer / ready to paint

Features: Lightweight, easy to work with, highly precise profile

💡 Styling tip: Keep a consistent distance (e.g. 15–20 cm) between the outer edge of the frame and the ceiling, floor or adjacent furniture. Maintaining the right proportions is key to achieving architectural harmony. See the full range of wall mouldings.

3. Three-dimensional texture: Flexible wall panels

Introducing vertical fluting and slats adds warmth and modern dynamism to an interior. Flexible panel options work well in areas with irregular shapes, such as around arches, columns or bends in walls. They allow the material to fit the surface perfectly without leaving gaps.

The use of durable HDPS material ensures complete resistance to moisture and damage, so the panels retain their original shape for years.

Recommended product: THALIA FLEX wall panel

Material: High-density polystyrene (HDPS)
Dimensions per panel: 41 mm (width) x 14 mm (thickness) x 2800 mm (length)
Finish: Matte white (ready for water-based paints)
Installation system: CLICK connection, adhesive installation

Features: 100% waterproof, flexible FLEX design for rounded surfaces and arches

💡 Styling tip: Use a fluted panel on part of a wall as a backdrop for a sofa or TV area. Pairing a wood texture or uniform matte colour with smooth moulding on either side creates a luxurious layered effect.

4. Discreet functionality: Architectural ceiling track

Traditional wall-mounted curtain poles often disrupt the minimalist style of modern interiors. A great alternative is a double PVC ceiling track, mounted directly to the ceiling. A model with a matte black finish pairs perfectly with a black skirting board, creating a vertical compositional link between the floor and ceiling.

This allows you to hang two layers of fabric (e.g. lightweight sheers and blackout curtains) along the full height of the room, making the interior appear taller.

Material: PVC
Length: 2000 mm (2.0 m), double track
Colour: Black (RAL9005)
Included: Double track and a complete set of PROLINE2 installation accessories

Features: Durable, smooth-running gliders/hooks, moisture-resistant

💡 Installation tip: When installing a ceiling track right next to patio doors, leave at least 10–15 cm between the window frame or radiator and the track so the hanging fabric can fall freely without resting against the glazing. Browse the other ceiling tracks and accessories, to find the right length for your window.

How to achieve a cohesive look

To combine moulding, 3D panels and black details without overwhelming the interior, follow this simple compositional checklist:

✔ Consistent colours: The black shade (RAL9005) on skirting boards, ceiling tracks and furniture details should have the same matte finish.
✔ Simplified colour palette: Keep the backdrop (walls, curtains, sofa) in neutral shades of white, beige and grey so the black elements and textures stand out clearly.
✔ Vertical continuity: Run ceiling tracks from wall to wall and hang curtains from the ceiling all the way to the floor.
✔ Transitions between materials: Pair smooth wall profiles with three-dimensional panels to clearly define separate zones (e.g. a moulded frame next to a fluted panel).

5 Golden Rules

Use a consistent surface finish – combine elements with the same look (e.g. matte with matte) to avoid making the design feel haphazard.
Choose profile proportions to suit the room height – in standard-height rooms (250–270 cm), skirting boards 8–10 cm high and wall mouldings 3–4 cm wide create an optimal balance.
Paint moulding the same colour as the wall – this creates a refined relief and depth without introducing unnecessary colour divisions.
Make use of the durability of synthetic materials – choose HDPS polystyrene and PVC in areas exposed to moisture and impact to ensure a long-lasting design.
Use bold colour accents sparingly – black finishing profiles and ceiling tracks work best as precise framing lines rather than as the dominant colour throughout the interior.

FAQ – Frequently asked questions

How does HDPS polystyrene differ from regular polystyrene foam?

HDPS (high-density polystyrene) is a hard, pressed material with high resistance to impact and dents. Regular polystyrene foam (EPS) is soft and susceptible to mechanical damage.

Can a black PS skirting board be cut with a regular saw?

Yes, polystyrene skirting boards can easily be cut with a fine-toothed hand saw or a power mitre saw at low speed (to prevent the material from melting).

Can THALIA FLEX flexible panels be installed in a bathroom?

Yes, THALIA FLEX panels are 100% waterproof and do not swell when exposed to moisture, making them suitable for bathrooms and spa areas.

What paint should be used on primed wall mouldings?

For wall mouldings with a factory-applied primer, use solvent-free, water-based paints – for example, acrylic, latex or ceramic wall paint.

How do I choose the right length of black ceiling track for a window?

The ceiling track should extend approximately 20–40 cm beyond the window recess on each side, so that the curtains do not block the light when drawn open.

Summary

A modern premium interior does not require complex structural solutions. A skilful combination of a black foundation of skirting boards and ceiling tracks, geometric wall moulding and the three-dimensional texture of flexible panels creates a space with thoughtful ergonomics and a polished aesthetic. By prioritising material quality and precise installation, you can create an interior that remains durable and timeless for years to come.

Contrast and texture in the interior: How to combine mouldings, 3D panels and black details