Interior Design Terms Explained: Architectural Details You May Not Recognise
As an interior designer in London, much of our work involves translating a shared language — one shaped by architecture, craftsmanship, and detail. While the visual outcome of a project is immediately understood, the terminology used throughout the design process often feels unfamiliar to those outside the profession.
London homes, in particular, demand a nuanced approach. Period architecture, conservation requirements, and contemporary interventions sit side by side, introducing a vocabulary that extends beyond surface aesthetics. Cornices, reveals, vaulted ceilings and moulding profiles are terms frequently referenced in interior design, yet their true meaning — and impact on a space — is not always clear.
This article explores ten architectural terms commonly used by an interior designer, offering clarity into the elements that quietly shape a well-resolved interior. Understanding these details provides insight into how thoughtful design decisions are made, and why they matter long after trends have passed.
1. Cornice
A cornice is a decorative moulding that runs along the junction between wall and ceiling. In period London properties, cornices can be highly detailed, while contemporary interiors often reinterpret them in simplified or shadow-gap form.
2. Vaulted Ceiling
A vaulted ceiling rises above the standard flat plane, often following the pitch of the roof or forming an arch. Vaulted ceilings increase perceived volume and are commonly introduced in loft conversions and extensions.
3. Reveal
A reveal refers to the recessed edge around a window, door, or opening. Deep reveals are often used in luxury interiors to create shadow, depth, and a sense of architectural solidity.
4. Architrave
An architrave is the moulded frame that surrounds a door or window opening. Its profile and proportion play a significant role in how traditional or contemporary a space feels.
5. Patina
Patina describes the natural ageing of materials over time. In interior design, materials such as brass, timber, and stone develop patina, lending richness and authenticity to a space.
6. Shadow Gap
A shadow gap is a narrow recessed detail used where surfaces meet, such as between walls and ceilings or around joinery. It creates crisp lines and a subtle sense of separation without decorative mouldings.
7. Sightline
A sightline is the view revealed when moving through a space. Thoughtful sightlines guide the eye towards architectural features, artwork, or views, shaping how a home is experienced.
8. Bolection Moulding
Bolection moulding projects proud of the wall or panel surface, traditionally used around doors, fireplaces, or panelling. In contemporary interiors, it is often refined to feel architectural rather than ornamental.
9. Ogee Profile
An ogee profile features a double-curved S-shape, commonly found in cornices, skirting boards, and architraves. This classical profile adds softness and elegance, often associated with period detailing and refined interiors.
10. Spatial Flow
Spatial flow refers to how easily one moves through a home. It considers circulation, thresholds, and room relationships, ensuring spaces feel connected and intuitive.
If you are interested in the thinking behind our work as a luxury interior designer in London, We regularly share further insight, expert guidance, and behind-the-scenes perspectives on interior design through our social media, offering a closer look at how projects evolve and how these details are applied in practice.