Why your jacket stopped beading (and why it may not be leaking at all)

There is a particular disappointment in pulling on a familiar jacket for a damp morning on the fells and feeling the cold start to creep in within twenty minutes. Nine times out of ten, the jacket is not leaking. The waterproof membrane is doing its job perfectly. What has failed is the durable water repellent finish, usually shortened to DWR, on the face fabric.

That finish is what makes rain bead up and roll off. When it wears away, the outer fabric soaks up water like a sponge. The jacket becomes heavy, feels clammy against your skin, and condensation builds up inside. It feels like a leak, but it is really a saturated outer layer sitting against a perfectly sound membrane.

Dirt, body oils, sunscreen, mud and repeated washing with ordinary detergent all break the finish down. The good news is that reproofing at home is straightforward, cheap compared with a new jacket, and genuinely satisfying. Set aside an afternoon, and you can bring a tired old favourite back to life.

What you will need

• A specialist technical cleaner, often sold as a gentle wash for waterproof clothing. Do not use ordinary biological detergent, fabric conditioner, bleach or soap flakes.
• A reproofing treatment, either wash-in or spray-on, depending on your jacket.
• A front-loading washing machine, or a clean bath and plenty of lukewarm water.
• A soft-bristled brush for dried mud.
• A clean towel or two.
• A tumble dryer if the care label allows it, or a warm iron and a cloth if not.

Before you start, read the care label inside the jacket. It will tell you the maximum wash temperature and whether tumble drying is permitted. Ignoring that label is the fastest way to ruin a good jacket.

Step one: clean the fabric gently

Empty every pocket, close all zips, fasten the Velcro tabs and loosen any cord locks. Dried mud should be brushed off outdoors with a soft brush, because mud in the drum will grind into the fabric.

Wash at 30°C on a gentle cycle, with the specialist cleaner dosed as directed. Use a double rinse if your machine offers one, and never add fabric conditioner, which coats the fibres and blocks the new treatment from bonding. If the jacket is heavily soiled, wash it twice. Half the battle with reproofing is simply getting the fabric genuinely clean.

If you are hand washing, use a bath of lukewarm water, agitate gently with your hands, and rinse until the water runs clear. Never wring or twist a waterproof jacket. Press the water out against the side of the bath instead, then roll it in a towel to absorb the rest.

Step two: apply the reproofing treatment

There are two main approaches, and the right one depends on your jacket.

Wash-in treatments are the simplest. They coat the whole garment evenly, inside and out, which is ideal for a simple shell. Pour the correct dose into the machine drum or detergent drawer and run a gentle cycle at 30°C, with no extra rinse.

Spray-on treatments are better for jackets with a soft lining, a fleece backer or a mesh lining that you would rather not coat. Hang the damp jacket on a line or shower rail and spray evenly from about 20 to 30 centimetres away, concentrating on the shoulders, hood, chest and cuffs, which take the worst of the weather. Wipe away any drips with a cloth. Work outdoors or in a well-ventilated space, and allow a few minutes for the treatment to settle.

Step three: heat is what makes it work

This is the step most people skip, and it is the difference between a jacket that beads beautifully and one that wets out again on its first outing. Many modern DWR finishes need warmth to align and activate properly.

Tumble dry on a low heat for 20 to 30 minutes, checking the care label first. If the label forbids tumble drying, hang the jacket to dry and then press it with a warm iron over a cloth, or run a hairdryer on a low setting over the surface, keeping it moving constantly.

Test the result by dripping a little water onto the shoulder. If it beads and rolls away, you are finished. If it soaks in, give it another short low-heat cycle.

Aftercare, small repairs and sensible storage

Reproof roughly once a season, or whenever water stops beading, and more often if you walk regularly in heavy rain. Wash the jacket in plain lukewarm water after muddy outings, and use the specialist cleaner every few washes. Front-loading machines are kinder than top-loaders, which can be rough on seam tape.

Deal with damage early. Small nips and thorn tears can be covered with an adhesive patch or a piece of repair tape, and lifting seam tape can be pressed back down with a warm iron over a cloth. Check the seams in good light once a year.

Store the jacket clean, dry and hung up, away from direct sunlight and radiators. Do not leave it compressed in a stuff sack for months on end, and never put it away damp. Avoid dry cleaning, which can strip the finish entirely.

Looked after this way, a decent waterproof jacket will keep you dry through many seasons of British weather. It is one of the most rewarding bits of kit to maintain, and far kinder to your wallet than replacing it every couple of years.