Building in steel stud
Cut cold, crimp or screw the studs, and set the screw gun depth once. Speed comes from the system rather than from working fast.
What changes from timber
Studs are cut a few millimetres short and dropped into the track rather than cut to a tight fit, because the track holds them. They do not need to be crowned, they are all identical, and they do not twist or shrink, so a steel partition stays as straight as the day it went up.
What you lose is the ability to fix anything to it later. A steel stud will not hold a screw in a useful way, so every future fixing point needs a timber noggin or a steel bracket put in now. That single fact catches out most people coming from timber.
- Cut short, not tight
- A few millimetres under. The track holds the stud, so a tight fit only bows the track.
- No crowning and no twist
- Every stud is identical and stays straight. This is the main advantage over timber.
- You cannot fix to it later
- Timber noggins or brackets for every future fixing, decided before boarding.
- It is lighter and faster
- One person can carry a partition's worth of studs, which is not true of timber.
Cutting steel stud and track
Snips and swivel head shears are the fast way, and they leave a slightly distorted end which does not matter because the end goes inside the track. An abrasive chop saw cuts quickly and throws hot sparks that burn the galvanising, leaving edges that will rust.
The one thing to be careful with is the sharp edge. A cut steel stud has a burr on it that opens a hand without any warning, and it is worse than sheet metal because the C section gives it a rigid backing.
- Snips or shears
- Fast, cold, and the distorted end sits inside the track where it does not matter.
- Not an abrasive saw
- It burns the galvanising and throws sparks that burn spots across the stud face.
- Gloves without exception
- A cut stud edge is rigid and sharp, and it is the injury this work is known for.
- Notch, do not cut, for services
- Studs have service holes. Cutting a new one anywhere else weakens the section.
Crimping or screwing
A stud is fixed into the track either by a crimper, which punches and folds the two together in one squeeze, or by a self drilling screw through the flange. Crimping is faster and leaves nothing proud, which matters because a screw head under a board line is a bump.
Where screws are used they go on the side of the stud that will not be boarded first, or the head has to be sunk properly. A proud screw head under plasterboard shows as a visible line down the finished wall.
- Crimp for speed and flatness
- One squeeze, nothing proud, and no fastener to catch a board.
- Screw where a crimp cannot reach
- At a corner or against an existing wall. Sink the head or keep it on the unboarded face.
- Nothing proud on a board face
- A screw head under plasterboard is a visible line down a finished wall.
- Do not over screw
- A self drilling screw spun after it has seated strips the thin steel and holds nothing.
Screw gun depth is the whole skill
Plasterboard onto steel is fixed with drywall screws driven to a set depth: the head just below the paper face, not through it. Through it and the screw holds almost nothing, and a whole wall driven too deep has significantly reduced fixing strength.
A screw gun with a depth stop nose repeats it. Set it on a scrap, check it after the first few, and check it again when the battery is fresh, because a fully charged gun drives harder than a flat one.
- Just below the paper
- A dimple, not a hole. Through the paper and the screw holds a fraction of what it should.
- Depth stop nose
- It repeats the setting across hundreds of screws where feel cannot.
- Recheck with a fresh battery
- A fully charged gun drives harder. The setting that was right this morning may not be.
- Fine thread for steel
- Coarse thread is for timber. Using the wrong one strips the steel or will not pull the board tight.
Openings and where load goes
A door opening in steel stud needs the studs either side boxed or doubled, and a header formed from track. Steel stud on its own is not designed to carry a door, and a single stud will flex every time the door closes.
For a heavy door, or anything carrying weight, the correct answer is a timber post inserted inside the steel stud, or a proprietary boxed section. Getting this wrong shows up months later as a door that no longer closes cleanly.
- Double or box the jamb studs
- A single stud flexes every time the door shuts, and the frame then works loose.
- Header from track
- Cut and folded to form a lintel, with short studs above it up to the head track.
- Timber inside the stud for heavy doors
- A post inserted in the C section, so the fixings go into timber rather than thin steel.
- Anything on the wall needs backing
- Radiators, brackets and rails. Decide the positions and put timber in before boarding.
Frequently asked questions
- What tools do I need for metal stud framing?
- Aviation snips or swivel head shears, a stud crimper, a screw gun with a depth stop, a chalk line, a level, a tape measure, a detector and cut resistant gloves. Add a hammer drill for fixing track into masonry floors and ceilings.
- How do you cut metal studs?
- With aviation snips or swivel head shears, which cut cold and leave a slightly distorted end that sits inside the track where it does not matter. Avoid an abrasive chop saw, because it burns the galvanising and throws sparks that burn spots across the stud face.
- What is a stud crimper?
- A tool that punches through the stud and the track flange together and folds the metal over, joining them in one squeeze. It is faster than screwing and leaves nothing proud, which matters because a screw head under a plasterboard line shows as a bump.
- Do metal studs need to be cut to an exact length?
- No, and they should not be. Cut them a few millimetres short and let the track hold them, top and bottom. A stud cut to a tight fit bows the track outward, which puts a visible kink in the finished wall along the head and the base.
- Can you screw into a metal stud?
- For plasterboard, yes, with fine thread drywall screws. For anything heavier, no: a steel stud will not hold a fixing in a useful way. Every future fixing point needs a timber noggin inside or behind the stud, decided and fitted before the wall is boarded.
- What screws do I use on metal framing?
- Fine thread drywall screws for plasterboard onto steel, and self drilling screws for steel to steel. Coarse thread screws are for timber and they will strip thin steel or fail to pull the board tight, which is a common and invisible mistake.
- How deep should drywall screws be driven?
- So the head sits just below the paper face, leaving a dimple rather than a hole. Driven through the paper the screw holds a fraction of what it should. A screw gun with a depth stop nose repeats it, and the setting needs rechecking with a fresh battery.
- Is metal framing better than timber?
- For a straight non loadbearing partition, often yes: it is lighter, it does not twist or shrink, every stud is identical, and it is faster. Against that, you cannot fix anything to it afterwards, so every future fixing has to be planned before boarding.