Why Your Selvedges Wander

A wavy selvedge is rarely a sign that you are doing something fundamentally wrong. It is nearly always the result of small, repetitive movements adding up across hundreds of picks. The two most common culprits are uneven warp tension across the width and an inconsistent beat. Add a weft that pulls the edge in, and you end up with edges that look more like a coastline than a ruler.

The encouraging part is that straight selvedges come from habits rather than natural talent. Fix the tension, steady your rhythm, and pay attention at the moment the shuttle enters and leaves the shed, and you will see a difference within a few centimetres of weaving — on a rigid heddle, a table loom, or a floor loom.

Set Your Warp Tension Evenly First

Before you throw a single pick, run your fingers across the warp near the back beam. It should feel like a harp: the same resistance at every end, with no slack patches and no ends pulled drum-tight. On a floor loom, check that the raddle spacing matches your sett and that the warp is wound on under even pressure, with paper or corrugated card between the layers to stop ends sinking into the layer below.

On a rigid heddle loom, the edge ends are the usual offenders. They slip through the heddle slots at a slightly different rate to the rest, so tighten and re-tension more often than you think you need to.

• Strum the warp with the flat of your hand and look for visible sagging ends.
• After 5–8 cm of weaving, release and re-tension the whole warp — it always settles once you start beating.
• Keep the cloth beam firm but not rock-hard; over-tightening the cloth flattens the warp and opens the sett at the edges.
• If one side is consistently loose, check the loom is sitting level and the apron rod is centred.

Beat with the Same Pressure Every Time

Inconsistent beating is the second great enemy of neat edges. If you slam the beater for ten picks and tap it gently for the next five, the weft spacing varies and the edges ripple in sympathy.

Sit so your elbows are roughly level with the beater. Bring the beater back to the same point each time — right up to the fell line, not pushed into it — and use the same amount of force on every pick. On a rigid heddle, press the heddle forward firmly and evenly rather than riding it down with your shoulder. If you find yourself leaning forward as you beat, you are using body weight instead of arm movement, and the rhythm will suffer.

Count out loud for a few rows if it helps. Weaving has a natural cadence, and finding yours makes straight edges almost automatic.

Handle the Weft Kindly at the Edge

Most draw-in happens in the first and last centimetre of each pick. Enter the shuttle at a slight angle — roughly five to ten degrees from the perpendicular — so the weft has a little slack as it turns the corner. Leave a small loop, or bubble, at the selvedge before you beat, then pinch the weft against the edge as you bring the beater forward. The bubble is absorbed into the shed and the edge stays put.

A few specifics that make a real difference:

• Always enter the shuttle from the same side first, so your hand movement is identical on every pick.
• Use a finer weft than you think you need. Chunky weft pulls the edges in mercilessly.
• On a loom without a floating selvedge, consider adding one — a single extra end on each side that is never threaded through a heddle. It gives the weft something to wrap around and transforms wobbly edges.
• Don't tug the weft tight after beating. Pull it snug, not taut.

Use a Temple to Hold Your Width

A temple is the quiet hero of tidy selvedges. It is a sprung bar with small sharp pins or rings at each end that grips the cloth just behind the fell line and holds it out at full warp width. This stops the natural draw-in that happens as the weft interlaces, and it also reduces reed marks and broken edge threads.

Temples come in set sizes, measured in centimetres or inches across the weaving width, so buy one that matches the project you weave most often. Fit it once you have 5–10 cm of cloth to grip, move it forward each time you advance the warp, and check the pins are not splitting threads. On narrow rigid heddle work under about 15 cm wide, you may not need one, but on anything wider it pays for itself quickly.

Do remember that a temple holds width; it does not create even tension. If the warp is badly tensioned, the temple will simply hold a wavy edge straighter and hide the underlying problem.

Habits That Build Neat Edges

Weave a sample first — 15 cm wide and 30 cm long in a smooth wool or cotton — and treat it as practice rather than a finished object. Measure the width every few centimetres with a ruler and note where it narrows. Check your selvedges after every ten picks rather than at the end of a session, when the mistake is buried.

Advance the warp regularly and roll the cloth on evenly so the beam does not build up thicker on one side. Take breaks. Tired hands beat unevenly, and a five-minute pause is cheaper than unpicking a metre. Above all, resist fiddling with the first centimetres — the beginning of any warp is always the loosest. Give it ten centimetres, and your edges will settle into the calm, straight lines you were after.