Installation of Shelves, Niches, or Other Recesses into Drywall

Everything starts with a frame of metal profiles. Profiles go around the edge of the future opening to define it and stiffen it. Strips of plasterboard screwed to the profiles form the sides and back of the niche and give it its depth. Only then come the board lining, the corner beads, the jointing and the painting.

The main steps look like this:

• Mark the exact position, size and depth of the niche before the frame goes up
• Fit profiles around the opening and add reinforcement for heavier shelves
• If there will be lighting, plan the cable route, the back box and a place for the driver
• Board the wall and the inner faces of the niche, then protect the edges with corner beads
• Fill the joints and edges, sand once dry and prepare for the final finish

Why does the order matter? If you plan the niche together with the wall, the studs can be spaced so that none of them runs through the opening. Cutting into a finished wall later is possible, but you often have to remove part of the boarding and add the missing profiles.

The thickness of the wall limits how deep the niche can be. A standard partition only has room inside for the width of the stud, so a deeper niche is easier to build in a wall lining, which can sit further away from the original wall. If the niche went right through the partition, only a thin back would remain on the other side, and the wall would let more sound through at that spot. Think about this before you put a niche in the wall between a bedroom and a living room.

The thickness of the board does not decide the load. What is behind it does. A standard frame is fine for light decorations. Books, electronics or full bathroom bottles need reinforced profiles, or a timber batten or board fitted into the frame, so that shelves or hidden brackets can be fixed into it. The system manufacturer and the fixing manufacturer give the exact load figures, so tell your installer in advance what will sit on the shelf.

• Recessed niche: the usual choice for bathrooms and hallways, flush with the wall so nothing catches on it
• Recess with several shelves: replaces a bookcase or shelving unit and needs solid reinforcement for every shelf
• Decorative recess: lower loads, with the focus on clean edges and often with backlighting
• Projecting plasterboard shelf or ledge: useful where the wall is not deep enough for a recess
• Glass or timber shelves inside a niche: these need a solid fixing point for the brackets hidden behind the board

In bathrooms, use moisture-resistant boards designed for damp rooms. Inside a shower that is not enough. The niche surfaces need a liquid waterproofing membrane, sealing tape in the internal corners, and a base with a slight fall outwards so water does not sit on it.

The job is simplest in a new partition or wall lining, when the niche is drawn into the plan before the frame goes up. These situations take more work:

• Cutting into a finished wall that has already been painted
• Unusual shapes, curves or many small shelves in one recess
• Heavier loads that call for a hidden supporting frame
• Built-in lighting and openings for spotlights or speakers
• Tiles inside the niche, where the joints have to line up with the rest of the wall
• A high-quality surface finish in raking light, which shows up every unevenness

If you plan an LED strip or spotlights, the wiring is a job for a qualified electrician. Rules for electrical work in bathrooms are usually stricter, so check what applies where you live. The LED driver must stay accessible, so it should never be sealed permanently behind the board.

In practice, a niche often looks good only for the first few months. The causes tend to repeat:

• No reinforcement, so the shelf sags over time and the filler cracks along the edge
• Cavity plugs in hollow board instead of fixings into a stud or fitted timber
• A niche too shallow for what it was meant to hold
• Edges without corner beads, which chip at the first knock
• Standard board in a bathroom, or no waterproofing in the shower
• An opening cut without checking for services, damaging a cable or pipe

Before you cut into an existing wall, find out where the cables and pipes run. If the niche is to go into a masonry or load-bearing wall, it is no longer drywall work but a structural alteration. In that case, speak to a structural engineer and check with your local building authority. In a block of flats, also contact the building management or owners' association.

If you are building a wall lining yourself and have some experience with plasterboard, you can manage a small decorative or bathroom niche without lighting. Call a professional for anything electrical and for any work on masonry walls.

1. Mark the niche on the floor, ceiling and wall, and check where the services run.
2. Fit vertical profiles on both sides of the opening and horizontal profiles above and below it.
3. For heavier items, fit a timber batten into the frame as a fixing point.
4. Board the wall and cut the opening exactly to the frame.
5. Cut board strips for the sides, top and base of the niche and screw them to the profiles.
6. Fit corner beads on all external edges.
7. Fill the joints and edges in several coats, letting each one dry as the manufacturer recommends.
8. Sand, prime and paint. In a shower, apply the waterproofing first and tile afterwards.

• The niche edges are straight and square, with no waviness when viewed from the side
• The inner faces are smooth even in raking light, with no visible joints
• The corner beads cannot be felt under the paint and the edges are not chipped
• The shelves do not sag under load and the brackets are firm
• The base of a shower niche falls outwards and the corners are sealed
• The lighting works and the driver is accessible
• There are no cracks around the niche and the wall does not sound loose when tapped