Building a Stud Partition Wall: Framing, Soundproofing and What It Won't Fix
A stud partition — a metal or timber frame boarded with plasterboard on both faces — is the standard way to split a room. It is non-load-bearing, light enough for most floors, and can be built and finished in days. How quiet it ends up depends on three things together: mass (how many board layers), a cavity filled with mineral wool, and decoupling of the two board faces, plus airtight sealing at every edge. Inside your own home a well-built double-frame partition gives good speech privacy. Against neighbour noise it does almost nothing, because that sound arrives through the party wall, floor and ceiling.
Check the structure first
A stud partition carries only itself plus what you hang on it, and can never replace anything structural. Never assume an existing wall is non-load-bearing because it looks thin: in pre-war Amsterdam and Rotterdam housing, slim walls routinely carry floor joists or a roof purlin.
The floor decides your fixing method. On timber joists, run the partition at right angles to them so the load spreads across several; if it must run parallel, put it over a joist or over added noggings. Point-loading one joist mid-span is the failure to avoid. On concrete, the risk is what you drill into: hollow-core floors contain voids and pre-stressed strands, and screed often hides underfloor heating pipes, which can mean adhesive fixing or a floating base track instead of anchors. Look up too: the head track needs something solid, and a suspended ceiling is not it. And map the services, because splitting a room strands radiators and extract grilles on the wrong side.
Framing: spacing, depth and openings
Steel C-studs in U-tracks are the default: straight, stable, non-combustible, with knockouts for cables. Timber suits heavy fixings.
Standard spacing is 600 mm centres; drop to 400 mm for tall walls, double boarding, tiled surfaces, or anywhere impact resistance matters. Stud depth (typically 50, 70 or 100 mm) sets both the maximum unsupported height and the cavity available for insulation and services; that height comes from the manufacturer's span tables, not rules of thumb. A deeper cavity is also the cheapest acoustic upgrade available, and you cannot change it later, so decide before ordering.
Door openings need doubled or boxed studs at both jambs and a proper header, with the jamb studs running full height to the head track. Keep board joints away from the opening corners: use L-shaped notched boards so each corner sits inside a whole board. Cracks above door corners are almost always a joint-alignment mistake. Pocket sliding doors hollow the wall out — less stiffness, no insulation, acoustically weak. Anything heavy needs noggings fitted before boarding.
Boarding and finish level
One board per side is the economy build: fine for a wardrobe wall, weak on sound, impact and fire. Double boarding roughly doubles the mass per face and is the most reliable upgrade there is, provided the second layer is offset so its joints never coincide with the first.
Pick board type per room: moisture-resistant in bathrooms and behind splashbacks, fire-rated where required, high-density acoustic board where mass is the goal, impact board in hallways and rental interiors. Boards stay off the floor by a small gap that gets sealed, not filled.
Finishing runs on a graded scale, from joints filled only up to a fully skimmed surface. Match the level to the light and the paint: matte paint on a diffusely lit wall forgives plenty, while gloss, dark colours or a wall raked by window light shows every joint and screw head. Use corner bead on external corners and a flexible joint against existing plaster.
What actually makes it quiet
Four levers, in order of impact: total mass, decoupling of the two faces, cavity depth, cavity absorption. Insulation alone in a single-frame, single-board wall gives only a modest improvement. Friction-fit the wool so it neither sags nor compresses. Decoupling means the faces share no rigid path: acoustic studs, resilient bars, staggered studs, or a full double frame.
Airtightness is not optional. Seal the perimeter with permanently flexible acoustic sealant, use resilient tape under the tracks, and seal every penetration: a few square centimetres of open gap will undo a whole second board layer. Never put electrical boxes back-to-back in the same bay. Doors are the ceiling on everything — a hollow-core leaf with a ventilation undercut performs far below the wall around it. Any figure quoted for a build-up comes from a laboratory; installed performance is always lower.
Neighbour noise: the honest answer
Your new wall changes only the path through itself. Neighbour noise comes through the party wall and flanking paths: the floor slab, the ceiling, side walls, shared ducts and pipe penetrations. An internal partition touches none of that.
The relevant intervention is a lining wall (voorzetwand): an independent frame standing clear of the party wall, with cavity, wool, double boarding and a sealed decoupled perimeter. Fix that frame to the party wall and you hand back most of the gain. Even done properly it is capped by flanking transmission and costs floor area. Footsteps from above, a washing machine, bass: structure-borne noise is barely affected by any wall on one surface. Speech and TV usually drop noticeably; promising a soundproof room is the biggest source of disputes on this job.
What to ask a provider
Ask which frame system the height is based on, whether boarding is single or double, what finishing level is quoted, and how the perimeter is sealed. In an apartment, confirm who checks VvE rules and working-hours limits. And ask for photographs of the open wall before boarding — that record is what stops a drill going through a pipe later.