DIY & DECORATING
A finishing touch that brings the room together.
Coving softens the join between wall and ceiling. Choose a profile that feels right, check how far it projects and plan the corners before ordering.
Practical ideas, clear measurements and a little help getting started.
- Compare the material and profile
- Check wall drop and ceiling projection
- Plan corners as well as straight runs
Start with the proportions
Look at the room’s ceiling height, the width of the walls and the detail already in the skirting and door trims. A plain curve can sit quietly in a simpler room; an ornate profile can suit a room with more existing detail. Hold up a sample or make a paper outline at the wall and ceiling join before choosing.
Ask for the dimensions that matter in place: how far the profile comes down the wall and how far it projects across the ceiling. A quoted face width or diagonal size is not automatically either of those measurements.
Materials to compare
| Material | What to consider |
|---|---|
| Gypsum or plaster-based coving | Check weight, the specified adhesive and any temporary support needed. Take care with longer lengths and corners. |
| Lightweight polymer coving | Check the actual material, profile detail, paint compatibility and the manufacturer’s fixing system. Similar-looking profiles can use different adhesives. |
| Traditional decorative plasterwork | Complex patterns, matching existing work or repairs can benefit from specialist fitting and a sample profile. |
Measure the runs and count the corners
- Sketch each wall and note the length of every ceiling-edge run. Do not order from floor area.
- Count inside and outside corners, returns and short sections around projections.
- Check the supplied length of the exact profile, and plan joints so a small offcut is not stranded in an awkward place.
- Allow for the cuts your layout needs. A simple percentage is not a substitute for checking how the pieces fit the stock lengths.
- Use the exact profile’s corner guide or compatible pre-formed corners. Real walls may not meet at a perfect right angle.
The preparation makes the finish
The fixing surfaces need to be suitable for the selected system. Check for loose plaster, flaking paint, grease, wallpaper and uneven areas, and follow the manufacturer’s preparation and adhesive instructions. Do not copy adhesive amounts or drying times from a different product.
Dry-fit short test pieces at the corners before cutting the longer runs. Work with safe access equipment and sufficient help for the length and weight you are handling. Avoid guessing where concealed cables or pipes may be when using temporary supports or mechanical fixings.
Match an existing profile carefully
Measure wall drop and ceiling projection and take a clear photograph of the end profile if you can do so safely. A similar-looking replacement may not line up with existing coving. For decorative plaster repairs or a close match, ask a specialist before ordering.
Check the complete order
Alongside the coving, confirm adhesive, any specified fixings or supports, compatible filler, primer and finish. Read delivery and returns terms, especially for made-to-order or fragile lengths. Keep the installation instructions with the order so the fitter uses the correct system.
For product-specific information, consult the manufacturer’s coving details and the instructions for the profile you actually choose.
A few questions before you start
Is coving size measured down the wall?
Not always. Suppliers may give a face or diagonal size as well as installed dimensions. Ask for wall drop and ceiling projection and check the profile drawing.
Can I put coving over wallpaper?
Follow the fixing system’s preparation instructions. Do not assume existing paper makes a sound bonding surface.
Should I fit it myself?
Simple profiles can suit someone confident with accurate cutting and safe access. Heavy lengths, uneven corners or ornate matching work can be a reason to use an experienced fitter.
Prefer a hand with the corners?
Describe your room, the profile and any existing coving so a fitter can quote for the right work.
Reviewed 2 October 2026. These guides provide general project information. Follow the instructions for the products you choose and ask a suitable tradesperson when the work needs specialist skills.