Flexible mouldings on cabinet doors: how to create arches and frames on a built-in wardrobe

A built-in wardrobe is often the largest flat surface in a room, and that is exactly why it can easily look like a block. Mouldings on the cabinet doors change that in one move: a frame gives the doors depth, an arch gives them character. With a flexible, self-adhesive moulding you can actually create that arch, because the moulding bends along the curve you draw. In this article we use two real wardrobes to show how arched mouldings are applied to cabinet doors, how to tackle it yourself on an existing wardrobe and how to finish it so moulding and door become one.

Why an arch works so well on a cabinet door

Look at the photo above and you will see why straight away. This room has a masonry alcove with a rounded arch, and the wardrobe doors next to it repeat exactly that shape. As a result, the wardrobe does not feel like a separate piece of furniture but like part of the architecture of the room. Repeating a shape is one of the oldest tricks in interior design: the eye recognises the rhythm and experiences calm. You cannot achieve this with a straight, sawn moulding, but you can with a flexible one. The moulding follows the curve without kinking, and you make the straight sides and the bottom with the same profile, so the frame is one material and one shape.

An arch also softens the hard lines of a wall of cabinets. Four tall, flat doors in a row are functional but stark; two arches on top turn them into a calm, almost classic whole. Because the mouldings are paintable, you can lacquer them in the same colour as the door. The relief then stays subtly visible through the play of shadow, without the moulding standing out as separate decoration. That is why more and more furniture makers and interior builders use this application in their own work, and why it is one of the most rewarding upgrades for an existing wardrobe too. Want to read the basics about arches first? Take a look at our page about flexible moulding for an arch.

How did the furniture maker approach this built-in wardrobe?

The wardrobe in the photos is a custom built-in unit with four MDF doors. Each arch spans two doors, so every arch is really a frame that is split down the middle by the gap between the doors. The maker chose Velida Flex Nova, a modern profile with a rounded core between two crisp edges, which matches the sleek doors and the fluted desk in the alcove beautifully. The installation photo shows the situation before lacquering: the doors are placed against each other, the arch is applied as one continuous line and the moulding has been cut neatly at the gap, so both doors can open independently later.

What stands out is how clean the shape is. An arch of this size, roughly one metre wide and two metres high, is made from one continuous length of moulding, so the curve stays seamless. The skill lies in the marking out: first determine the centre line of the arch (here the gap between the doors), then mark the height of the straight section and draw the semicircle from that point using a pencil and a piece of string or a cardboard template. Then lay the moulding along the line, start at the highest point of the arch and work your way down on both sides. This spreads the tension of the curve evenly and keeps the profile at the same height on the door everywhere. The tape and clamps in the photo show that the maker held the doors firmly in place while working, a smart step when you are working across a gap.

How to create an arch on an existing cabinet door yourself

You do not need to be a furniture maker to achieve this result. The method is the same as on a wall, only a cabinet door is smaller and easier to reach. It works best if you take the doors off and lay them flat on a table, but it can be done on a hanging door too. Allow a relaxed afternoon for two doors, including marking out. For the full explanation with photos of every step, see our installation guide for mouldings and arches, but here is the essence in three steps.

Step 1 is marking out. Measure the width of the door and decide how much border you want to leave around the edge; 5 to 8 centimetres looks good on most cabinet doors. Draw the straight sides and the bottom with a ruler and mark the arch at the top using a piece of string as a compass, with the radius equal to half the width of your frame. Step 2 is cutting: cut the moulding to size with a moulding cutter or a sharp knife and allow for about 10% cutting waste. If you are working across two doors, only cut the moulding at the gap once it is in place, so both halves line up exactly. Step 3 is sticking: make the surface free of dust and grease, remove the protective film and press the moulding on evenly along your line. Work calmly around the curve and do not pull, then the arch stays true. If the ends lift slightly, fix them straight away with a drop of superglue with activator.

How do you finish the moulding so it becomes one with the door?

On a wall, you simply paint the moulding along with the wall paint. On a cabinet door you usually want a lacquer finish, and there is one extra step that has been proven in practice: first apply a coat of universal primer over moulding and door, then lacquer with a regular water-based lacquer in the colour of the wardrobe. This gives the lacquer the same adhesion everywhere, and after lacquering you will not see any transition between MDF and moulding. The first photo shows the end result after lacquering: the arches are visible through their relief, but it is impossible to tell where the door ends and the moulding begins.

If you are working with an existing wardrobe that is already lacquered or melamine-faced, the self-adhesive moulding adheres well, provided the surface is clean and grease-free. Even then we recommend the primer before you lacquer the whole door, because otherwise the moulding and the existing finish react differently to the new lacquer. Let the lacquer cure properly before you rehang the doors. Read more about colour choice and finishing in our article on which colours work well with mouldings.

Why arches work so well in a nursery or children's room

This nursery shows that arches on cabinet doors are not a one-off idea from a furniture maker. A customer gave her built-in wardrobe two tall arches on the doors with Velida Flex Nova, in exactly the same colour as the wardrobe. Between them is an open alcove with a rounded top and wooden shelves, and the narrow cabinet at the side also ends in an arch. The same shape returns three times in one wall, and that gives the room a calm you feel the moment you walk in. The rug with its scalloped edge and the rounded accents in the decor complete the picture.

It is no coincidence that rounded shapes work so well in a children's room. Research into how we perceive shapes shows that people experience curved lines as softer, friendlier and calmer than sharp corners and straight edges. In a room where children play, feed and sleep, that calm is exactly what you want. Arches also fit seamlessly with the warm, natural style you see in many children's rooms today: soft tones, wood, rattan and rounded accents. In a small room the wardrobe wall is often the largest surface, so an arch on the doors changes the character of the whole space in one go.

A children's room grows along with your child, and this approach helps there too. Because the mouldings are paintable, you paint them in a soft nursery colour now and just as easily in a fresher or bolder shade as your child gets older. The arch shape itself suits a nursery, but just as well a teenager's room, so the wardrobe does not need redoing. Want to carry the arches further through the room? Repeat the same shape on the wall, for example behind the cot or around a play or reading corner. You will find inspiration for arches on the wall in our article about a Japandi arch in your interior.

Does this also work on an IKEA wardrobe or other furniture?

Yes, and that is exactly where many people start. The smooth, flat doors of a PAX wardrobe or a BILLY bookcase are an ideal surface for a frame or an arch. On a 50 centimetre wide PAX door, a single arch fits per door. Such an arch will be narrower than 50 centimetres, and in that case you fix the moulding along the curve with superglue with activator. On two doors side by side you can, just like on the built-in wardrobe above, create one larger arch across the gap. The moulding adheres to melamine and foil as long as the surface is clean, and after primer and lacquer a standard wardrobe can no longer be told apart from custom work. Which IKEA models work best and what else is possible, you can read in our article on IKEA hacks with mouldings.

Beyond IKEA it works just as well on sideboards, kitchen cabinets, wardrobe panels and interior doors. The principle is always the same: a flat surface, a drawn line and a moulding that follows the line. An arch on an interior door is a lovely example: it repeats the shape of an arched alcove or a curved doorway elsewhere in the house, just like in the rooms in the photos. Not sure whether your wardrobe is suitable? Send us a photo. We are happy to help with size, profile and approach free of charge, before and after your order.

Which profile should you choose for a cabinet door?

All four of our profiles are 2 centimetres wide and 1 centimetre high, so they stay nicely in proportion on a door. The difference is in their character. Nova, used on both wardrobes in this article, is modern and graphic and suits sleek, contemporary interiors. Classic has a wavy, timeless profile that works in almost any home. Crown is layered and classic and turns a wall of cabinets into a stately whole, lovely in period homes. Luna is a single, fully rounded shape without edges and gives a soft, organic arch. Browse all profiles in our range of flexible mouldings; how many metres you need for your wardrobe, you can work out with the calculator on every product page.

Frequently asked questions about mouldings on cabinet doors

Does a self-adhesive moulding stick to MDF, melamine or lacquered wood?

Yes. The self-adhesive strip adheres to smooth, clean and grease-free surfaces such as MDF, melamine, foil and existing lacquer. Clean the door with a degreaser before sticking and let it dry.

Can I make one arch across two cabinet doors?

Yes. Place the doors against each other, draw and stick the arch as one continuous shape and only then cut the moulding at the gap. That way both halves line up exactly when the doors are closed.

How do I lacquer the moulding together with the cabinet door?

First apply a coat of universal primer over moulding and door, then lacquer with a water-based lacquer in the colour of your choice. This method has been tested in practice on MDF cabinet doors and gives a seamless result.

How many metres of moulding do I need per cabinet door?

For an arched frame of about 100 by 200 centimetres, including the bottom, you need about 5.6 metres; you can make it from one continuous length of moulding. If you want to allow 10% cutting waste, count on a little more. For smaller frames per door you can get several frames from the same length. With the calculator on every product page you can work out exactly how many metres you need for your measurements.

Conclusion

Mouldings on a cabinet door are the quickest way to turn a flat wall of cabinets into furniture with character, and with a flexible moulding you can even make an arch that repeats the shapes in your home. Draw the shape, cut the moulding to size, stick it along your line and finish with primer and water-based lacquer. Whether it is a custom built-in wardrobe, a nursery or an existing PAX, the result looks custom-made. Browse our full range of flexible mouldings and choose the profile that suits your wardrobe.