Interior assemblies · Partitions & Linings
Framed Internal Partition System
This entry sets out how a site-built stud-and-board partition is organised - framework, cavity, facing, head and perimeter - and which of those decisions, rather than the board choice, govern what the finished wall can be asked to do.
Educational reference entry. How this system behaves depends on climate, jurisdiction, loading, substrate, the adjacent systems it meets, how the building is used, the manufacturer's instructions and qualified professional design.
Overview
What framed partition is
A framed partition stands between rooms without carrying floor or roof load. A track at floor and soffit locates light vertical members, boards are fixed to one face or both, and the space enclosed between the faces becomes the working part of the wall. Everything visible is board and jointing compound, which is exactly why the assembly is so often mistaken for a finish rather than a piece of construction.
The cavity is the reason the same visible wall can behave in completely different ways. It may be empty, filled with quilt, occupied by cable and pipe runs, crossed by a resilient layer, or lined with concealed sheet backing where something will later be hung from it. None of those choices changes the room's appearance, and all of them change what the wall can do and what can be done to it afterwards.
The perimeter carries as much of the story as the cavity does. Where the partition meets the structure above, the floor build-up below and the walls on either side, the junction has to accommodate movement in the structure, close the line between the partition and whatever it abuts, and stop the cavity turning into a continuous route around the room. Those junctions are usually the first thing to show distress and the last thing to be drawn.
The boundary against a separating wall is worth stating plainly, because they look alike on a plan and are often built from similar parts. A separating wall exists where the element divides separately occupied spaces and a transmission path is being defeated; a framed partition exists to divide a space. The test is not the build-up but the question asked of it. This entry is also distinct from the manufactured demountable and folding partition products catalogued as materials, which arrive as a proprietary kit rather than being assembled from components on site.
Terminology
Common names and aliases
These names describe the same assembly. The encyclopedia keeps one entry per system so that a trade term or a regional name never becomes a second, thinner page.
- stud partition
- metal stud partition
- timber stud partition
- drywall partition
- stud-and-board partition
Purpose
What this system is intended to do
The job the assembly exists to perform, conceptually. An intention is not a guarantee that any particular build achieves it.
- Divide interior space without taking load from the floors or the roof above it.
- Provide a concealed route for cable, pipe and duct runs between rooms and floors.
- Carry a flat, decoratable surface that can be repaired without disturbing the framing behind it.
- Give later fixings something to attach to, where concealed backing was built in before the boards closed the cavity.
- Accommodate movement in the structure above without transferring it into the finished face.
Composition
The roles this system is made of
What each part does in the assembly and what it depends on — never a product, a thickness, a fixing or a determination that anything is adequate for the role.
Order is not meaningful in this system. These roles interact as parts of one whole rather than stacking up in a sequence, so the list below is not a build-up and nothing should be read into the order it appears in.
- Primary supportVertical studs
The repeating vertical members that hold the boards flat and take wind, impact and door-swing forces back to the head and base. Their depth sets the cavity, so the stud choice quietly decides how much room there is for infill and for services.
- Edge and terminationHead and base tracks
Continuous channels that locate the studs at floor and soffit and form the junction with the surrounding construction. The head connection is the more demanding of the pair, because it has to restrain the partition laterally while still letting the floor or roof above move independently of it.
- Cavity or voidThe inter-stud cavity
The enclosed space between the board faces. Left alone it is a void; filled, crossed or subdivided it becomes the part of the partition that does the work the board face is usually credited with. It is also continuous along and over the wall unless something deliberately interrupts it.
- Thermal layerCavity quilt infill
Soft or semi-rigid infill placed between studs. What it is there to achieve varies with the brief, and whether it is present, continuous and in contact with the framing is settled at design stage rather than adjusted later, because closing the boards puts it permanently out of reach.
- Finish surfaceBoard facing
The sheet material fixed to the framing, either directly or built up in layers with staggered joints. It gives the wall its surface, restrains the studs against twisting, and is the only part most people ever see or judge the partition by.
- Jointing and sealingJoint treatment and perimeter sealing
Tape and compound at board joints, beads at arrises and stop ends, and a closed line where the boards meet floor, soffit and abutting walls. Joint treatment behaves as part of the board face in service: a crack appears at the joint, not across the sheet.
- AttachmentConcealed backing and noggings
Sheet or timber built into the cavity before boarding, positioned where a rail, cistern, screen, handrail or heavy cabinet is expected. Once the face is closed the backing cannot be added, and if its position was never recorded it cannot reliably be found again.
- Service zoneService route through the framing
Cable and pipe runs threaded through prepared openings in the studs. Where they pass through they interrupt whatever infill is present and leave a fixed object in the cavity that any later work has to find and avoid.
- Primary supportOpening trimming
Additional members framing a door or hatch, taking the load around the opening and giving the lining something square and stiff to fix to. An opening is where a partition's stiffness changes abruptly, which is why cracking so often begins at a door head corner.
Interaction
How the parts work together
The reason this is a system rather than a list of parts: what depends on what, and what stops working when one part is changed.
The board face and the framing are not independent. Boards are what stop slender studs buckling and twisting, and studs are what keep boards flat; weaken either and the other stops working. That is why a partition boarded on a single face behaves differently from the same framing boarded on both, and why cutting a large opening into a finished face changes the wall rather than just the surface.
The cavity's usefulness depends entirely on being uninterrupted where it should be and interrupted where it should not. Infill pushed aside by a cable run leaves a gap the board face cannot compensate for. Trunking laid tight against both faces couples them together. A partition stopped at a suspended ceiling leaves the cavity open to the void above, so the wall a reader sees ends well below the wall the assembly actually needs.
The head detail decides whether structural movement reaches the finish. If the framing is fixed hard to a soffit that deflects, the movement finds its way down the studs and out through the weakest thing available, which is the board joint or the abutment seal. A head arranged to let the structure move without gripping the studs keeps that movement out of the face, but only if the boards, the seal and any infill at the head are detailed to move with it rather than pin it.
Concealed backing turns an ordinary partition into one that can actually be used, and its value is destroyed as easily by omitting it as by installing it and never recording where it went. What a later fixing reaches behind the face differs between a backed area and an unbacked one, and nothing on the finished face distinguishes them; what any fixing will carry is in any case a matter for the fixing manufacturer's documentation and the designer. The record made at boarding stage therefore behaves as part of the assembly in a way no other component does.
Materials
Material families commonly met in each role
Commonly encountered, not recommended. Whether a material suits a given project depends on the whole assembly, the exposure, the manufacturer's documentation and qualified professional review.
Primary support
Light metal sections and sawn softwood are the families commonly encountered as partition framing. Whether any particular product belongs in a given partition is a matter for the manufacturer's documentation and the designer.
Finish surface
Board families commonly encountered as the facing differ in density, in how they take a fixing and in how they are jointed. Which one belongs on a particular partition is settled by the designer against the manufacturer's documentation, not by comparing boards in isolation.
Thermal layer
Quilt and semi-rigid batt families are commonly encountered as cavity infill. What the infill is there to achieve, and whether any product is appropriate to the partition it sits in, is a question for the designer and the product documentation rather than for this entry.
Jointing and sealing
Jointing compounds, edge beads and perimeter sealants are commonly encountered in closing the face and the abutments. Where fire provisions have been determined by others, sealant families intended for those junctions appear here; the determination itself sits well outside this entry.
Attachment
Sheet families are commonly encountered as concealed backing behind the facing. Whether a given backing will carry what is eventually hung on it depends on the fixing, the load and the framing behind it, and that judgement belongs with the designer.
Junctions
Where this system meets others
Interfaces are where most assemblies actually fail, so they are set out explicitly rather than left inside the prose. What resolves a junction is a detail designed for the specific building — not a rule of thumb.
Partition head against a suspended ceiling
A partition that stops at a ceiling line and one that continues to the soffit look identical in the room and behave differently above it. Where the partition stops low, the ceiling void becomes a continuous connection between the rooms it was meant to divide, and any expectation of separation has to be met by something else in the void.
Read about Framed Board Ceiling →Cavity handing over to the service zone
Services entering the partition arrive from a ceiling, floor or riser zone, and the handover is where coordination usually fails: the run is set out in the void, the studs are set out in the wall, and neither drawing shows the other. Openings hacked through framing after the fact are the visible symptom.
Read about Service Void →Base track on a floating floor build-up
Whether the partition stands on the structural deck or on top of a floating layer changes the assembly beneath it. A track fixed through a resilient layer pins that layer locally; a partition standing on the floating layer bears on it along a line. Which arrangement applies is a design decision needed before either trade starts.
Read about Floating Screed Build-Up →Junction with an external wall
An internal partition running into an external wall interrupts whatever continuous layers the external wall carries. The abutment has to let those layers run past or be joined to them, and a partition cavity opening into an external wall cavity is a route neither designer intended to create.
Read about Air Barrier System →Door and hatch openings
A doorset transfers slamming and swing forces into the trimming around it, and the lining has to be fixed to something square and stiff. Openings are also where the board face changes from continuous sheet to short pieces, so the junction between lining, trimming and board is where the finish is most often disturbed.
Where a partition meets a separating construction
A partition running into a wall that divides occupancies can carry sound past that wall through its own framing and cavity. What happens at that junction - whether the partition is stopped, broken or taken through - belongs with the separating construction's designer, not with the partition's.
Read about Separating Wall →
Considerations
Topics worth discussing
Which topics genuinely apply to this system and what to raise about them. Measured values, classes and ratings come from a qualified professional's design for the specific building, not from a reference page.
- Movement
- Movement reaching the finished face usually arrives from the structure above rather than from the partition itself. How much movement is expected, and whether the head detail is arranged to absorb it, is set by the structural design and is not something the board or its jointing can be asked to solve.
- Acoustic
- Acoustic behaviour is a property of the complete tested assembly together with the flanking construction around it, including the ceiling void, the floor build-up and every service penetration. This entry states no values and the question belongs with a qualified acoustic professional.
- Buildability
- The moment the cavity is closed governs everything that can be put into it, so infill, services and concealed backing all compete for the same window. Anything unresolved by then becomes either a change to the programme or a permanent omission that nobody can see.
- Maintenance and access
- Repairing a partition face is straightforward; reaching what is inside it is not. Whether future access is through a formed panel, through a lifted ceiling tile or by cutting the board is worth settling while the layout is still on paper.
- Durability
- Wear on a partition concentrates at arrises, at door heads and at low level where trolleys, furniture and cleaning equipment reach. Whether the facing, the beads and any protection provided answer the traffic expected is a design judgement about use, not a property of the board.
- Documentation
- The information that matters most about a finished partition - where backing was placed, what the cavity contains, how the head was detailed - is invisible once the face is closed. A record made at that moment is what makes the wall alterable later.
Design
Questions the design has to answer
The decisions this assembly turns on. They are questions rather than answers, because the answer depends on the building.
- Does this partition stop at the ceiling line or continue to the structural soffit, and who decided that?
- What is the cavity expected to contain, and has anything been reserved for services not yet designed?
- Where will something later be hung, and has concealed backing been placed and recorded at those positions?
- How much movement can the structure above impose on the head, and how is the detail arranged to absorb it?
- Is the partition boarded on one face or both, and does anything in the brief depend on that choice?
- Where the partition abuts an external wall, do the external wall's continuous layers run past it or stop at it?
- Which openings are formed in the framing, and does the trimming around them align with the boarding pattern?
Boundaries
Commonly misunderstood points
Distinctions that are easy to blur, and the places where a familiar term means something narrower than it sounds.
- A partition is treated as a finish because the visible part is board and compound, when the decisions that matter were all made in the cavity.
- Heavier board is assumed to fix problems that actually originate at the head, at the perimeter or at a service penetration.
- Because the finished faces look identical, a partition with concealed backing and one without are assumed to be interchangeable.
- A partition stopped at a suspended ceiling is read as a full division of the space, when the void above it runs straight over the top.
Conversations
Questions for qualified professionals
Bring these to the relevant qualified professional, manufacturer or authority. Requirements vary by project and location.
- What movement does the structure above this partition allow, and how does the head detail accommodate it?
- What is the partition required to do beyond dividing the space, and which component delivers that?
- Where has concealed backing been provided, and how will its position be recorded for the owner?
- How are service penetrations through the framing to be made good, and by whom?
- Does anything about this partition change where it meets an external wall or a separating construction?
- If the cavity has to be reached again, what is the intended route into it?
What this page does not do
- Fire performance is a property of a tested assembly and a matter for the relevant authority; this entry states none and none should be inferred.
- Nothing in a partition is airtight, damp-resisting or sound-limiting in isolation; those properties belong to complete, correctly detailed and correctly installed assemblies.
- Fixing anything substantial to a finished partition without knowing what sits behind the board risks both the fixing and the services in the cavity.
Related systems
How this system relates to others
Every link states what the relationship actually is, rather than leaving a bare list of related pages to be read as a suggestion.
Alternatives
Different systems answering the same need. Listing them together is not a comparison and does not suggest one is better — which, if either, suits a project is a design decision.
Meets these systems
Systems this one physically meets. The junction is usually where the design problem lives, so these are worth reading together.
Commonly built alongside
Systems routinely present in the same building without necessarily touching this one.
Narrower entries
Systems published as variants of this one
Each of these is a case of the system above, narrowed by one defining property. They inherit what is described here rather than restating it, so this page remains the general account.
Go deeper
Related Build Design Hub guides
Planning guidance behind the decisions this assembly involves.
Preparation
Related planning checklists
Owner-side preparation before the conversation where this system comes up.
Inspiration
Related Ideas Library pages
Design directions where this system commonly appears.
Internal Partitions, Linings, Ceilings and Wet Areas
Internal elements whose behaviour comes from the framework, the void and the perimeter behind them rather than from the board or tile on the visible face.
Browse all partitions & linings entries →