Why a Stud Partition Is a Great First Fixing Project

A stud partition wall is one of the most useful bits of carpentry you can learn. It lets you carve a box room out of a landing, separate a bathroom from a bedroom, or create a handy utility nook without touching the structural walls. Better still, it is a genuinely achievable project for a confident DIYer with a few basic tools and a bit of patience. The principle is simple: a timber frame of sole plate, head plate, vertical studs and horizontal noggins, covered with plasterboard. Get the frame straight, plumb and rigid, and the plastering or taping that follows will be far easier.

Tools, Materials and Setting Out

Before you cut anything, gather what you need. For a typical internal wall you will want:

• Timber: 63mm x 38mm CLS studwork is fine for most walls. Go for 89mm x 38mm if you need to run waste pipes or want extra sound insulation.
• Plasterboard: 12.5mm tapered-edge sheets, plus 9.5mm if you are bending around a curve.
• Fixings: 75mm or 100mm frame fixings for masonry, 65mm screws for timber floors, 32mm plasterboard screws, and a box of 50mm nails if you prefer nailing.
• Tools: tape measure, pencil, spirit level, 600mm level, plumb bob or laser level, circular saw or handsaw, cordless drill, hammer, bolster chisel, and a fine-tooth saw for trimming.

Start by marking the wall position on the floor and ceiling. Check for hidden pipes and cables using a detector—water and electrics have a nasty habit of running exactly where you want to drill. If you are fixing to a concrete floor, lay a strip of damp-proof membrane under the sole plate to stop moisture creeping into the timber.

Fitting the Sole and Head Plates

Cut your sole plate (the bottom timber) and head plate (the top timber) to length. If the wall meets an existing wall, leave a small expansion gap and fill it later with acoustic sealant. Fix the sole plate first. On a timber floor, screw down into joists where possible; if you miss the joists, use heavy-duty frame fixings or concrete screws. On concrete, drill and plug, then screw through the timber. Check the plate is straight and level as you go—pack it with plastic shims rather than forcing it down. Do the same for the head plate, making sure it sits directly above the sole plate. Use a plumb bob or laser to transfer the line accurately. Any twist now will show up as a wavy wall later.

Fixing the Vertical Studs

Studs are normally set at 400mm or 600mm centres. Go for 400mm if you want a stronger wall or will be hanging heavy items like a wall-hung basin or a TV. Measure and cut each stud to fit tightly between the plates. Fix the first stud at one end, then the last stud at the other end, and run a string line between them to keep everything in line. Fix intermediate studs with two 75mm screws or nails through the sole plate and two through the head plate, toe-nailed or screwed at an angle. Check each stud for plumb with a spirit level as you go. If a stud is slightly twisted, fit it with the bow facing the same way so the plasterboard can pull it straight. For a doorway, add a trimmer stud and a header, doubling up the studs either side of the opening for strength.

Adding Noggins for Rigidity

Noggins are horizontal timbers that sit between the studs and stop the wall from twisting or bowing. Fit them in rows at around 1200mm centres, or at mid-height for a standard 2.4m wall. Stagger the noggins from row to row so they do not all line up—this makes the frame much stiffer. Cut them slightly oversize and tap them into place, then screw or nail through the studs. If you need to run cables or pipes through the wall, drill holes through the centre of the studs and noggins rather than notching the edges. Keep holes at least 50mm from the face of the timber to avoid weakening it. For extra sound insulation, pack mineral wool between the studs before you board over.

Fixing Plasterboard and Finishing the Wall

Plasterboard can be fixed vertically or horizontally. Vertical sheets are easier to handle, but horizontal sheets give a stronger wall with fewer joints at waist height. Whichever you choose, stagger the joints so they do not line up with the joints on the other side. Use 32mm plasterboard screws and drive them in every 150mm along the edges and every 200mm across the middle. Set the screw heads just below the surface without breaking the paper. Leave a 3mm gap between sheets and fill it with scrim tape and jointing compound, or have the whole wall skimmed by a plasterer. If you are taping and filling yourself, apply two or three thin coats, sanding lightly between each. Once finished, the wall should feel solid, straight and ready for paint or paper. Take your time on the frame—it is the part that decides whether the finished wall looks professional or permanently wonky.