What Is The Difference Between Cornice, Coving And Crown Moulding?
If you're renovating a period property or planning to add decorative plasterwork to your home, you've probably come across the terms cornice, coving and crown moulding. They are often used interchangeably, but they don't always mean exactly the same thing.
Understanding the differences can help you choose the right feature for your property, communicate more effectively with architects and restoration specialists, and ensure any new work is appropriate for the style and age of your building.
What is coving?
Coving is generally the simplest of the three decorative features. It is fitted where the wall meets the ceiling to create a smooth transition between the two surfaces.
Rather than forming a sharp 90-degree angle, coving introduces a gentle curve or uncomplicated profile that softens the appearance of the room.
Modern coving is often manufactured from lightweight materials such as polyurethane, duropolymer or polystyrene, although traditional plaster coving remains a popular choice for higher-end projects and period properties, especially in London.
Because of its clean appearance, coving is suitable for a wide range of interiors, including:
Contemporary homes
New-build properties
Minimalist interiors
Extensions and loft conversions
Rooms where a subtle decorative finish is preferred
Simple coving can also be found in many older homes where elaborate decorative mouldings were never originally installed.
What is a cornice?
A cornice is typically more decorative and architecturally detailed than standard coving.
Like coving, it is installed at the junction between the wall and ceiling, but its profile usually incorporates ornamental features such as:
Dentils
Leaf motifs
Scrollwork
Floral designs
Classical mouldings
Historically, plaster cornices were handcrafted to complement the architectural style of a property. Georgian homes often feature elegant, restrained designs, while Victorian and Edwardian properties may display much more elaborate decorative work.
Original plaster cornices are commonly found in:
Townhouses
Country houses
Listed buildings
Historic public buildings
Churches
Grand entrance halls
Because these features form part of a building's architectural heritage, preserving them wherever possible is often the preferred approach during renovation projects.
What is crown moulding?
Crown moulding serves the same basic purpose as both coving and cornices: it bridges the gap between walls and ceilings, but the term is used primarily in North America.
In the United States and Canada, crown moulding is the general term for decorative mouldings installed at ceiling level, regardless of whether they are simple or highly ornate.
As a result, an American contractor might describe both plain coving and an elaborate plaster cornice as crown moulding.
Why the terminology matters
Although the differences may seem minor, using the correct terminology can be important when discussing restoration or renovation work.
For example, if you're restoring an original Victorian dining room with ornate decorative plasterwork, referring to the feature as a cornice more accurately reflects its historic and architectural significance.
Similarly, when sourcing replacement sections or commissioning bespoke mouldings, specialists will want to understand whether they're recreating a simple coving profile or an intricate period cornice.
Which is right for your property?
The best option depends largely on the age, style and character of your building.
Modern homes
Simple coving often complements clean architectural lines without overwhelming the room. It provides an elegant finish while maintaining a contemporary aesthetic.
Period properties
Historic homes generally benefit from cornices that reflect the property's original architectural style. Replacing ornate plaster cornices with plain modern coving can diminish the character of a room and reduce the authenticity of a restoration.
Heritage buildings
Listed and heritage properties frequently contain handcrafted plaster cornices that contribute significantly to their historic importance.
In these cases, specialist restoration allows damaged sections to be repaired or carefully reproduced while retaining as much original material as possible.
Can cornices be reproduced?
Yes; one of the advantages of traditional plaster restoration is that missing or damaged sections can often be recreated using surviving originals.
A plaster cornice specialist may:
Take casts from existing mouldings
Produce bespoke moulds
Hand-finish decorative details
Seamlessly integrate replacement sections with the original plasterwork
This allows even heavily damaged cornices to be sympathetically restored while maintaining the room's historic appearance.
Traditional plaster offers crisp detailing, durability and authenticity that can be difficult to achieve with lightweight alternatives. It is particularly well suited to period and heritage properties, where preserving architectural character is a priority.
For modern homes, high-quality plaster mouldings can also add timeless elegance and create a more substantial, premium finish.
Whether you're preserving original Georgian plasterwork or adding classic detail to a contemporary home, choosing the right moulding can make a significant difference to the finished result.