How to build a media wall: depth, fires and the build steps

What a media wall is

A media wall is a false wall, framed in timber or metal studs, built a short distance in front of an existing wall and boarded over. The space behind hides the cables, sockets and the body of an electric fire, and the face is shaped with a recess for the TV, a slot for the fire, and often shelving or alcoves either side. It can run the full width of a room or sit in the middle like a chimney breast.

None of it is structural. It is a lining wall, framed like a stud wall, built off the floor and fixed to the wall behind and the ceiling above, and that is why it is a carpentry job rather than a building one.

How deep should a media wall be?

Depth is the first decision, because everything else has to fit inside it, and every millimetre comes out of the room.

The fire decides it more than the TV. Every electric fire comes with installation instructions giving its recess size and the clearance it needs, and the frame is built to those figures. A 300mm-deep wall across a 4 metre room takes 1.2 square metres off the floor, so in a small room it is worth asking whether a slimmer fire would do.

Electric fires, heat and the TV

Electric fires designed for inset use are the usual choice, because they need no flue and plug into a socket or a fused spur. Their instructions set the minimum distance to the TV or any shelf above, whether vents are needed, and whether the recess must be lined in a particular board. Follow them exactly; that document is what the fire's warranty and safety depend on.

The common mistake is height. A fire below a TV pushes the screen up, and a TV mounted high above a fire is uncomfortable to watch from a sofa and runs hot if the clearance is short. Viewing height suits a screen centred roughly at eye level when seated. Where the wall has room for only one of them at a comfortable height, putting the fire to one side solves both problems.

Gas fires are a different project. Fitting one is legally work for a Gas Safe registered engineer, and it needs a flue and ventilation designed in from the start.

Electrics and the rules

In England, three kinds of electrical work are notifiable under Part P: a new circuit, a new consumer unit, and work in a room with a bath or shower. Adding sockets as spurs from an existing circuit in a living room is not notifiable, but it must still be done safely and certified, and many households choose an electrician for it. A dedicated circuit for a powerful fire is notifiable. In Wales the rules are wider, so check before work starts there.

The frame itself does not normally need building regulations approval, because it is not structural and does not divide a room. What it must not do is block an airbrick, a vent or an open flue. If there is an old fireplace or chimney behind the wall, ask whether it needs venting rather than sealing in.

The build, step by step

A typical media wall takes one to two days to frame, then time for plastering and drying, then a day of second fix.

• Design. Measure the TV, its bracket and its weight; take the fire's installation instructions; decide where the sockets, soundbar, consoles and any lighting go.
• Check what is behind. Scan the existing wall and floor for pipes and cables before fixing anything.
• Frame. Fix a sole plate to the floor and a head plate to the ceiling joists, then studs at 400mm or 600mm centres, with the fire box built to the manufacturer's sizes.
• Noggins. Add solid timber exactly where the TV bracket, shelves and any heavy fittings will fix.
• First fix electrics and cables. Back boxes, cable routes, conduit for HDMI and spare draw cords, and LED channels if there is lighting.
• Board and finish. Plasterboard, taped and filled or skimmed, or panelling if that is the finish.
• Second fix. Fit the fire, hang the TV, connect the lighting and fit any shelves, then decorate.

Mistakes worth avoiding

Conduit is cheap at frame stage and much harder to add afterwards, so run more than you think you need. Leave a way to get the fire out for repair without cutting the wall open. Do not enclose consoles and amplifiers in a cupboard with no ventilation. Put noggins behind every bracket rather than relying on cavity fixings in plasterboard. And photograph the frame and cable runs before it is boarded, so anyone drilling later knows where the cables run.

DIY or a carpenter?

A competent DIYer can frame and board a simple media wall. The parts that take the most skill are the fire's recess and clearances, the electrics, and a flat, crisp finish on the boarding, and those are where a carpenter's time goes. A fitted media wall typically costs £1,500 to £4,000. The frame is usually less than half of that; the fire, the finish and the electrical work make up the rest, so check whether a quote includes plastering and the electrician or leaves you to book them. Alcove shelving or cupboards either side are often built at the same time, and are cheaper done together than added later.