What Is a Ceiling Cornice (Kartonpiyer)?

A ceiling cornice (Turkish: kartonpiyer) is an architectural moulding applied at the corner where the ceiling meets the wall, giving the space a decorative frame and an elegant transition. It softens the sharp corner of the ceiling, conceals lighting and installation details, and adds unity to the interior. Today, lightweight, ready-sized and easy-to-install polyurethane cornice stands out; plaster cornice is also used.

A cornice is used for both aesthetic and functional purposes: 1. Decorative transition: It softens the corner between ceiling and wall with an elegant moulding, giving the space character. 2. Concealment: It hides details such as curtain boxes, spotlight lines and electrical wiring. 3. Hidden lighting: Hidden-light (LED-channel) models provide soft indirect lighting reflected onto the ceiling. 4. Proportion and unity: By framing the ceiling, it balances the architectural proportion of the room. With these features, a cornice is a decorative element preferred in many interiors such as living rooms, bedrooms, hotels and shops.

Cornices vary by shape, function and material: - Plain cornice: A basic, slim-profile type suitable for modern spaces. - Curved / ornamented cornice: A relief-patterned model used in classical decoration. - Hidden-light cornice: A model with a channel for an LED strip to create indirect lighting. - Cornice with pelmet: A type applied above windows that also encloses the curtain box. - Rose and corner elements: Ceiling roses and corner details used together with the cornice. By material, cornices are divided into polyurethane cornice and plaster cornice.

Both materials are used, but their advantages differ: - Polyurethane cornice: Lightweight, unbreakable, moisture-resistant and comes in ready sizes. Installation is fast; it is simply cut and bonded. It can also be used in damp areas such as bathrooms and kitchens. - Plaster cornice: Can be applied on site and may be economical on large surfaces; however, it is heavy, moisture-sensitive, and its installation requires skill and time. If fast installation, light weight and moisture resistance are priorities, polyurethane cornice is the more practical choice.

Polyurethane cornice is installed in simple steps: 1. Measuring and planning: The perimeter of the ceiling is measured; if hidden light is used, the LED line is planned. 2. Cutting: The cornice is cut at a 45° mitre for the corners. 3. Bonding: A polyurethane-based mounting adhesive is applied to the back and pressed into the ceiling-wall corner. 4. Joint and corner: Joints and corners are filled with filler. 5. Sanding and painting: The surface is sanded and painted with wall paint. A clean mitre cut and the right adhesive ensure the joints remain invisible.

The cornice price depends on several factors: - Profile size: As the width and height of the cornice increase, the price per linear metre rises. - Model: Plain profiles are economical, while ornamented and hidden-light models cost more. - Material: Polyurethane and plaster fall into different price ranges. - Quantity: The total length varies according to the space. Since our products are made to order, prices are given on a project basis. Our prices cover only the product cost; shipping and installation are excluded, and products are ex-works. For a precise quote, contact us with your dimensions and model.

A cornice is a decorative moulding applied at the corner where the ceiling meets the wall. It softens the corner, conceals installations and gives the space an elegant frame.

A hidden-light cornice is a model with a channel to hold an LED strip. The light reflects onto the ceiling without being directly visible, creating soft indirect lighting in the space.

If fast installation, light weight and moisture resistance are desired, polyurethane cornice is more practical. Plaster can be economical on large surfaces but is heavy and moisture-sensitive.

The cornice is cut to size with a mitre, polyurethane mounting adhesive is applied to its back and it is pressed into the ceiling-wall corner; joints are filled, sanded and painted.

Yes. Polyurethane cornice can be painted any colour with wall or ceiling paint. It is recommended to paint after installation and joint filling are complete.

Because polyurethane cornice is moisture-resistant, it can be used in damp areas such as bathrooms and kitchens. Plaster cornice is not suitable for these areas.

A cornice is used in many interiors — living rooms, bedrooms, hotel lobbies, shops and offices — to frame the ceiling and provide decorative unity.

The cornice price depends on the profile size, model complexity (hidden light, ornamentation), material and total quantity. Because products are made to order, the price is given on a project basis.