Before You Thread a Needle

There is something quietly satisfying about rescuing a jumper that has been loved thin. Most knitted damage falls into four camps: holes made by moths or snags, edges worn through by cuffs and hems, seams that have given way, and elbows or underarms rubbed into transparency. Before you start, look at the whole garment in good light and gently stretch it sideways — small holes have a habit of hiding in the folds.

Match your repair yarn as closely as you can in weight and fibre. A 4-ply patch in a DK jumper will pull and pucker. If you have no spare yarn, unravel a few centimetres from an inside seam allowance or a cuff turned to the inside. Wool blends take a splice beautifully; acrylic is trickier, so use a knot-free Russian join and weave the ends in firmly. A darning mushroom or a smooth, round jar works well as a backing, and a blunt tapestry needle will slip between stitches rather than splitting them.

Duplicate Stitch for Moth Holes and Small Nibbles

Duplicate stitch — often called Swiss darning — is the most forgiving repair in knitting. It rebuilds the missing stitches on top of the fabric, following the path of the original yarn, so the mend disappears into the texture.

• Thread your needle with about 40cm of yarn and anchor it on the wrong side, catching the purl bumps without pulling tight.
• Work from the bottom of the hole upwards, following the V shape of each knitted stitch. Bring the needle out at the base of the V, up behind the two legs of the stitch above, then back down where you started.
• Keep your tension loose. The duplicate stitches should sit on the surface like a shadow, not grip the fabric. If the area puckers, unpick and start again with a lighter hand.
• For a hole larger than a five-pence piece, build a scaffolding first: run a few loose horizontal threads across the gap as a foundation, then duplicate stitch over them.

Blend the repair by working one or two stitches beyond the hole into sound fabric. On a patterned jumper, follow the colour blocks exactly — a misplaced stitch is more noticeable than a slight difference in shade.

Grafting: Invisible Joins and Closed Gaps

Grafting, or Kitchener stitch, creates a row of knitting that looks as though it was always there. It is ideal for closing a slit where a seam has opened, or for repairing a hole where the row structure is still visible above and below.

• Place the live stitches from the upper and lower edges onto two needles, with the right sides facing you.
• Work in a rhythm: through the first stitch on the front needle purlwise and off, knitwise and leave on; then the back needle knitwise and off, purlwise and leave on.
• Match the tension of the surrounding fabric exactly — graft a little slack, then ease it out at the end with the tip of the needle.

For cuff-to-sleeve joins on fair isle or striped knits, graft in pattern so the colours line up. If the yarn is too short to graft a whole row, work in two halves and weave the ends in on the inside.

Worn Cuffs, Hems and Elbows

Edges wear first because they take the friction. When a ribbed cuff has gone thin but not yet holed, duplicate stitch over the worst rows with matching yarn to reinforce it before it fails. If the cuff has actually split, consider reknitting the last few centimetres and grafting the new section onto the sleeve — a job of an evening, and the result is stronger than any patch.

Elbows and underarms are classic felt-patch territory. Needle-felting a small patch of matching wool over the thin area gives a soft, durable mend, but test on an inside hem first, as the fibres lock permanently. For a lighter touch, layer two or three strands of yarn across the thin patch and darn in a loose, open weave, keeping the needle parallel to the knitting so it stays elastic.

Loose Seams, Neckbands and Fastenings

Seams that have popped rarely need a full resew. Catch the two edges with a mattress stitch in matching yarn, working one stitch into each side and pulling gently every few centimetres so the join is invisible from the right side. On shoulder seams, which carry weight, use a slightly stronger backstitch behind the mattress line.

Stretched neckbands can be tightened by threading a length of matching yarn through the inside of the rib and drawing it in to the original measurement, then securing at the shoulder. For cardigans, loose buttons should be resewn with a shank — a small gap between button and fabric — so the buttonhole sits flat, and any frayed buttonhole edges can be blanket-stitched with sewing thread in a matching shade.

Washing, Moths and Storing Your Repairs

Moths are drawn to protein fibres soiled with sweat and food, so hand-wash repaired knitwear in cool water with a gentle wool detergent, rinse well, and dry flat on a towel away from radiators. If you find active moth damage, seal the garment in a bag and freeze it for a fortnight, then air it thoroughly before storing.

Store clean knitwear folded, never on hangers, with cedar blocks or lavender bags nearby. Rotate your repairs gently: give a mended cuff a rest for a week or two after washing, and check the patch before returning it to the drawer. A garment that has been mended once will, with a little care, give you another decade of wear — and each repair carries a small record of the hands that made and kept it.