Shoe construction: what resoles and what will not

The join is the whole question

Everything else about a shoe can be read on the shelf, and it still dies at the join, where the wear lands and where a repair has to enter. A cobbler does not so much fix a shoe as open it. Some shoes open.

The joins you will meet

Goodyear welt

A strip of leather, the welt, is stitched to the upper and to a rib standing up from the insole. The outsole is then stitched to that welt and to nothing else, which is the whole trick: the second line of thread never reaches inside the shoe. A cobbler cuts it, lifts the sole away, stitches a fresh one to the same welt, and the upper is never disturbed. The cavity between insole and outsole is packed with cork that compresses into a private impression of your foot. Goodyear is Charles Goodyear Jr, whose workshop perfected the welting machine in 1869, not a grade of leather.

One caution on machine welted shoes: the rib is often a canvas strip cemented to the insole rather than carved out of it. It holds for years, and when it goes the job becomes a rebuild.

Blake stitch

One line of stitching passes through outsole, insole and upper at once, sewn by a machine with an arm long enough to work inside a finished shoe. No welt, so the sole trims close and the shoe is lighter, more flexible and much slimmer in profile. It resoles: cut the stitch, fit a new sole, put the machine back in. The condition is finding a cobbler who owns one, since Blake work often goes out. Blake rapid, the variant with a midsole, is stitched from outside and resoles like a welted shoe.

Cemented

The outsole is glued to the upper and held by nothing else. It is the lightest join, the cheapest, and most shoes made today are built this way. A cobbler can grind a cemented sole off and bond a new one on, which holds on a well made upper and lifts at the toe within a season on a cheap one. Vulcanised soles, where the rubber is cured onto the upper under heat, are a near dead end outside the few shops that specialise in them.

Reading the join from the outside

Put the shoe on a table and get level with the sole edge. A welted shoe shows stitching running the perimeter of the sole, out on the flat of the welt beyond the line of the upper, and you can put a fingernail on the thread. A Blake stitched shoe shows nothing out there and sits tight against the upper; lift the sock liner and look for a stitch line running the inside perimeter, the same stitch seen from the other side. A cemented shoe shows a glue line and no working thread anywhere.

One warning, and it applies to shoes that cost real money: a row of thread sewn through the sole edge holding nothing, or a stitch pattern moulded into the rubber. Thread that does not pass through a welt into a sole is jewellery.

When a resole earns its money

A resole costs roughly what a resole costs, whatever shoe it goes under, and that fact does the sorting: the same quote is a bargain beneath a welted shoe you paid properly for and absurd beneath a glued one you did not. Weigh it against the upper too, the thing you are actually preserving. Once the leather is cracked through at the vamp crease, no new sole rescues it.

Timing decides the price. Bring welted shoes in while there is still sole under the stitching, because once the outsole wears through to the welt stitch, and then the welt, the job grows a stage. Rotate pairs so each gets a day to dry, then read the note on salt before the trucks are out in December. Construction is no defence against a Toronto winter. It decides what can be replaced afterwards.

Questions to ask a cobbler

• What construction is this, and where can you show me the stitch?
• Do you do Blake work here, or does it go out?
• Will the new sole match the old in material and thickness?
• Is the welt sound, or does the welt need replacing too?
• What is the quote against what the pair is worth to me?

The tenth year is decided at the sole edge

Offered a fine hide on a glued sole or a plain one on a welt, take the welt. The grade of the leather tells you how a shoe ages; the join tells you whether it gets to age at all. Browse the Toronto catalog and read the sole edge in the photographs first. A cemented shoe has a lifespan. A welted shoe has a service history.