Building a stud partition wall: the steps for a beginner

Is this actually a non-load-bearing wall

A partition wall you build yourself should carry nothing but its own weight and perhaps a shelf or a television bracket rated for stud fixing. It divides space; it does not hold up a floor, a roof, or another wall above it. In panel buildings and newer developments the load-bearing structure is usually the external walls and a limited number of internal concrete walls, but this varies by building and by floor.

If you are dividing an existing room into two, and the new wall runs parallel to the joists or the slab spans above it without resting on your new wall, it is very likely non-load-bearing. If you are in any doubt, or the building is older with timber floor joists whose direction you cannot confirm, check the building's documentation or ask before you start.

This guide does not cover moving or altering a load-bearing wall under any circumstances, and it does not cover gas installations. Both need a specialist, and for a load-bearing wall that specialist needs a structural assessment, not a handyman.

What you need: tools and materials

The frame is normally built from either timber studs or galvanised steel profiles (CW for the verticals, UW for the track top and bottom). Steel profiles are straighter, do not shrink, and are the more common choice in flats; timber is fine in a house and easier to fix heavy items to later if you plan ahead with noggins.

For a standard partition you will need track and stud profiles, self-drilling screws for the metal or wood screws for timber, plasterboard sheets (12.5 mm is standard for a single layer), joint tape, joint filler, a spirit level, a laser level if you have one, a stud detector, a plasterboard saw or a sharp knife and straightedge, a screw gun, and mineral wool if you want the wall to deaden sound.

Buy a few millimetres more insulation width than the frame depth so it sits without gaps, and buy boards long enough to avoid horizontal joints where possible — a joint running the full height of the wall is far easier to finish invisibly than one running across it.

• Track and stud profiles or timber battens
• Plasterboard sheets, 12.5 mm
• Self-drilling screws or wood screws
• Mineral wool insulation
• Joint tape and joint filler
• Spirit level, stud detector, plasterboard saw

Putting up the frame, step by step

Mark the wall's position on the floor with a chalk line, then transfer it to the ceiling with a plumb line or laser so both lines sit directly above one another. Fix the floor and ceiling track along these lines with screws or plugs suited to the substrate, packing out any unevenness in a concrete floor so the track sits flat.

Cut vertical studs about 10 mm shorter than the floor-to-ceiling height and slot them into the track at 400 or 600 mm centres, adding extra studs either side of any doorway and around where a heavy fixture will hang. Check each one is plumb with a spirit level before screwing it to the track.

Run noggins or blocking horizontally between studs at the height where you expect to fix shelving, a TV bracket, or a radiator, since fixing straight into plasterboard alone will not hold weight. Once the frame is square and every stud is plumb, tuck the mineral wool between the studs before boarding begins.

Fixing the boards and jointing them

Board one side first, fixing sheets vertically with screws every 200–300 mm into each stud, driven just below the paper surface without tearing it. Stagger the joints on the second side of the wall so they do not line up with the joints on the first side, which reduces the risk of a crack telegraphing through later.

Once one side is fully boarded, run any electrical cabling for sockets or switches before closing the second side — a qualified electrician should carry out the actual wiring and connections. Then board the second side the same way, again keeping joints staggered and away from door openings where the board is already weakened by the cut.

For jointing, apply filler into each joint, bed paper or self-adhesive mesh tape into it, then apply two to three thinner coats of filler over increasingly wide bands, sanding lightly between coats. Screw heads get the same treatment. A well-feathered joint should be invisible under raking light once painted.

The mistake most people make

The most common problem is not the framing but impatience with the joints: applying one thick layer of filler instead of several thin ones, or sanding before it is properly dry. This leaves a slightly raised or sunken line along every joint that only shows once the wall is painted, usually under a window or a downlight where the light rakes across the surface.

The second most common issue is a frame that is out of plumb by a few millimetres per stud, which does not sound like much until the door lining goes in and will not sit square, or the skirting has a visible gap at one end. A few extra minutes with the spirit level on every single stud avoids both of these entirely.

When to stop and call someone

Framing and boarding a straightforward partition is a realistic weekend project for someone comfortable with basic tools and willing to work carefully and slowly. Where it stops being straightforward is anything involving the building's structure, any wall you are not certain is non-load-bearing, and all electrical wiring, which needs a qualified electrician regardless of how the rest of the wall was built.

If the finish is not coming out flat after a couple of attempts at jointing, or the job has grown to include a doorway, sound insulation between rooms, or matching an existing ceiling cornice, it is often more economical to bring someone in for the finishing stage than to keep sanding and re-filling.

We take on plasterboard work from 28 € per job, general odd jobs from 39 € per hour, and full flat renovations from 180 € per job, and we cover Tallinn and Harju county. A call-out to look at a partly finished wall costs 25 € within Tallinn, deducted from the bill if the work goes ahead.