Coving & Cornicing

Why Fit Coving or Cornicing?

The junction between wall and ceiling is one of the most visible lines in any room. Without coving or cornicing, any imperfections at this joint - cracks, uneven plaster, gaps, paint lines - are fully visible and can spoil an otherwise well-finished room.

Coving and cornicing:

• Conceals imperfections at the wall-ceiling junction
• Adds architectural interest to plain rooms
• Creates visual continuity around the room’s perimeter
• Complements period features in older properties
• Provides a professional finish that lifts the entire room

In many East Kent period homes - Georgian, Victorian and Edwardian properties in Canterbury, Deal, Whitstable and across the area - cornicing is an original feature that defines the character of the room. Damaged, missing or mismatched cornicing can significantly detract from the property’s appeal and value.

Lee on coving and cornicing work

Coving and cornicing is steady but not the bulk of the work. Most customer requests are for standard coving in new builds or modern renovations, the simple curved profile that finishes off the wall and ceiling junction. Restoration work on period properties is a more specialist sub-section, and where the design is ornate or it’s a notable listed building, I’ll bring in the team member who specialises in that side. For standard plaster coving the Gyproc product is what I recommend. The fitting is the skill, the mitre cuts have to be right and the room has to actually be square for the coving to look good, and old rooms rarely are.

Types of Coving

Simple Coving

A plain concave curve, typically 100-127mm in size, that bridges the wall-ceiling angle. This is the most popular choice for modern homes and renovations where a clean, understated finish is wanted. Available in plaster, polyurethane and polystyrene.

Decorative Coving

A curved profile with some decorative detail - perhaps a step, a bead line or a simple leaf pattern. This sits between plain coving and full ornate cornicing, offering a touch of elegance without being overly elaborate. Popular in semi-modern properties and rooms where some character is wanted without going full period.

Period Cornicing

Elaborately moulded profiles featuring egg-and-dart, dentil, acanthus leaf, rope twist, Greek key and other classical motifs. These profiles range from relatively modest (150mm projection) to substantial (300mm+ projection) for grander rooms. Essential for period properties and high-end renovations.

Bespoke Cornicing

For restoration work where the existing cornicing is a unique design, or for clients who want something specific, bespoke profiles can be made to order. A mould is created (often from a sample of the existing profile) and sections are cast in fibrous plaster.

Lee on bespoke profiles

For ornate restoration work, including listed buildings and churches, I work with a specialist within the Perfect Plastering team who handles the heritage cornicing side. Casting bespoke profiles from a sample of existing work is craft-level skill and not something I do day to day, so it’s right that someone who specialises in it takes those jobs on. For standard stock profiles I source from the usual suppliers, Gyproc for plaster coving and specialist suppliers for the more decorative profiles when needed.

Materials

Plaster Coving and Cornicing

Traditional plaster coving and cornicing is heavy, solid and produces the most authentic result. It is the choice for period property restoration and anywhere that weight and authenticity matter. Plaster profiles are available from suppliers like British Gypsum, Hodkin & Jones and specialist architectural moulding companies.

Plaster is more challenging to fit than lightweight alternatives - it is heavy to handle, requires careful cutting (especially mitres) and needs to be well-supported while the adhesive sets. But the finished result is superior: solid, with a depth and crispness that lightweight materials struggle to match.

Polyurethane Coving and Cornicing

Modern polyurethane profiles have improved dramatically and are now a genuine alternative to plaster for many applications. They are:

• Lightweight and easy to handle
• Available in highly detailed ornate profiles
• Simple to cut with a fine-tooth saw
• Paintable to the same finish as plaster
• Moisture-resistant (suitable for bathrooms and kitchens)

Brands like Orac Decor and NMC produce excellent polyurethane profiles that are difficult to distinguish from plaster once painted.

Polystyrene Coving

The budget option. Polystyrene coving is extremely light, cheap and easy to fit, but it lacks the crispness and solidity of plaster or polyurethane. It is suitable for rental properties, budget renovations or rooms where durability is less important. We fit it when customers specifically request it, but generally recommend polyurethane as a better alternative for not much more money.

Lee on materials and brands

Plaster coving is what I’ll recommend for most jobs because it has the depth and crispness that the lighter materials don’t quite match once they’re painted. The brand I’ll specifically recommend is Gyproc, sometimes also sold as Jiprock, it’s consistent, widely available, and the profile is clean. Polyurethane has its place if a customer wants ornate detail or needs something moisture-resistant for a bathroom, and the better polyurethane brands are good now, you’d struggle to tell once it’s painted. Polystyrene I’ll only fit if a customer specifically requests it on budget grounds, but I’ll always explain it’s not the same quality.

Our Fitting Process

1. Survey and Selection

We measure the room, note the number of internal and external corners, and discuss profile options with you. If you are matching existing cornicing, we identify the profile and source matching sections. For new installations, we can bring samples or catalogues to help you choose.

2. Preparation

The wall and ceiling surfaces along the coving line must be clean, sound and free of wallpaper or flaking paint. We scrape and clean the fixing area, and score the surface with a knife or scoring tool to provide a key for the adhesive. In some cases, particularly with heavy plaster cornicing, we also apply mechanical fixings (screws) for additional security.

3. Cutting and Fitting

This is where skill and experience matter most. Every internal corner requires a mitre joint, and every external corner requires an opposite mitre. Rooms are rarely perfectly square, so mitres often need adjusting to produce tight joints. We:

• Measure and mark each length carefully
• Cut mitres using a mitre block, box or (for larger profiles) a mitre saw
• Apply Gyproc Coving Adhesive or a suitable equivalent to the back edges
• Press each length firmly into position and support it while the adhesive takes hold
• Fill and smooth all joints between lengths, and between the coving and the wall/ceiling

4. Finishing

Once the adhesive has set and the joints are filled, the entire coving run is lightly sanded (if needed) and prepared for painting. A good coving installation should look like a continuous, seamless feature running around the room with no visible joints.

Restoration and Repair

In period properties, existing cornicing may be damaged, missing in places (where walls have been altered) or obscured under layers of paint that have filled in the detail. We can:

• Repair damaged sections by building up with plaster and re-profiling to match
• Replace missing lengths with matching profile (stock or bespoke)
• Strip paint build-up to restore crisp, clean detail to original cornicing
• Create moulds of existing unique profiles for reproduction

Restoring original cornicing is almost always preferable to replacing it, as the craftsmanship in original Victorian and Georgian plasterwork is often of a quality that is difficult and expensive to reproduce.

Lee on notable restoration

The team does notable cornice restoration work on period properties, including listed buildings and churches, through the specialist on the team. Where the design has to match an existing profile from the 1800s, that’s craft work that’s earned over a career. I’ll take on a heritage job, but the actual heritage cornicing is led by someone who specialises in it, which is the right way to do it. Honest answer is that if you’ve got an unusual or important profile to match, you want the right hands on the job, not the most convenient ones.

Coving in Modern Renovations

Even in contemporary renovations, coving has a place. Simple, modern profiles in clean lines complement current interior design trends. Shadow-gap coving (where a slight recess is left between the coving and the wall or ceiling, creating a clean shadow line) is increasingly popular in high-end modern interiors.

LED strip lighting can also be incorporated behind coving to create indirect, ambient lighting effects. The coving is fitted with a slight gap from the ceiling, and an LED strip is concealed behind it, washing the ceiling with light. This creates a striking effect that is popular in living rooms, bedrooms and home cinemas.

Lee on LED and shadow-gap coving

LED strip work is a nice job to do because the finish is dramatic and customers love the result. It needs more coordination with the electrician for the wiring and the transformer location, and the coving has to be fitted with a gap to hide the strip without showing the LEDs themselves. It’s a contemporary detail rather than a traditional one. I’d happily do more of it, the rooms come out really well, and it’s a way to use coving for a modern aesthetic rather than a period one.