Why waterproofs give up in British weather

A waterproof jacket is not one single magic layer. It is a sandwich: a face fabric, a waterproof membrane, taped seams and a durable water repellent finish, usually called DWR. Rain rarely punches straight through a healthy membrane. What usually happens is that the face fabric wets out, the jacket feels cold and clammy, and condensation builds inside. Grime, sweat, sun cream, bog mud, woodsmoke and body oils all clog the fabric and stop the DWR from doing its job.

If water stops beading and starts soaking into the shoulders and sleeves, the jacket is not necessarily dead. It often just needs a proper clean and reproof. The same goes for waterproof trousers, which take a beating from heather, gritstone and boggy ground.

• Wetting out: the surface darkens, clings and feels heavy, even though the membrane is intact.
• Leaking seams: tape lifts or cracks, often around shoulders, hood and pack straps.
• Punctures and abrasion: thorns, crampons, rock edges and zip teeth create small holes that grow.
• Zips and cuffs: grit, mud and repeated tugging wear out the parts you rely on most.

Washing: the reset your jacket needs

Before washing, empty every pocket, close all zips, fasten hook-and-loop cuffs and loosen hood cords. Brush off dried mud with a soft brush. Use a pH-neutral technical cleaner made for waterproof clothing, or a very small amount of pure soap flakes if you are hand washing. Do not use biological detergent, fabric conditioner, bleach or anything with added softeners. These leave a coating that actively attracts water.

Machine wash on a gentle, cool cycle, around 30°C, with an extra rinse. A front-loading machine is gentler than a top-loader. If you are unsure, hand wash in a bath or large basin, agitating gently and rinsing until the water runs clear. Pay attention to the collar, cuffs and shoulders, where oils build up fastest. Cleaning is not just about appearances: it removes the invisible film that stops DWR from working.

Drying and heat: the step most people skip

After washing, let the jacket drip dry, then tumble dry on a low heat if the care label allows. Gentle heat reactivates many DWR finishes. Check the label first, because some membranes and trims have different limits. Tumble on low for around twenty minutes, then take it out and test it with a few drops of water. If the water beads and rolls off, you may not need to reproof at all.

If you do not have a tumble dryer, hang the jacket in a warm, airy room. Avoid direct heat from a radiator, stove or open fire, which can delaminate the membrane and melt trims. In a bothy, hang wet waterproofs high and well away from the stove. Sparks from a fire can burn pinholes in seconds, and smoky air leaves a greasy film that harms DWR.

Reproofing without overdoing it

There are two main choices: spray-on and wash-in reproofers. Spray-on is usually best for jackets with linings, pit zips and mixed fabrics, because you can target the outer face fabric and avoid making the inside tacky. Wash-in products suit simple shells and waterproof trousers, but they can reduce breathability if overused. Always clean the garment first, otherwise you are sealing dirt into the fabric.

For spray-on, hang the clean jacket while it is still damp and mist the outer fabric evenly. Pay extra attention to shoulders, hood, cuffs and the front hem. Work the spray in with a clean cloth or sponge, then dry according to the label. For wash-in, follow the dose carefully and run the garment through a separate cycle. Do not reproof a jacket that is already beading well after washing and heat. More product is not better; too much attracts dirt and makes the jacket feel clammy.

Repairs you can do at home or in a bothy

Small tears and pinholes are worth fixing straight away. Clean and dry the area, then apply a flexible repair patch or adhesive repair tape. Round the corners of patches to stop them peeling. For tiny holes, a drop of clear flexible seam sealant can be enough. If seam tape is lifting, clean the area, dry it thoroughly and press it back with gentle warmth. If the tape has gone completely, sealant can bridge the gap, though it will not be as neat.

Carry a small repair kit on any wild camping trip: repair tape, seam sealant, a needle, strong thread and a spare cord for zip pulls. A broken zip slider can sometimes be coaxed back with pliers, but a cord loop through the remaining puller is a useful temporary fix. In a bothy, do not dry waterproofs directly over a naked flame, and never leave them on a hot stove. At a tarn-side camp, sit on a mat rather than rough granite, and keep sharp tent pegs and stove parts away from your jacket.

Trousers, storage and habits that extend life

Waterproof trousers need the same care as jackets, but they often get neglected. Wash them when they are muddy or when water stops beading, then reproof the knees, seat and lower legs, which take the most abuse. Avoid sitting directly on abrasive rock or grit, and repair small nicks before they split. If trousers have reinforced patches, clean around the edges where dirt collects.

Store waterproofs clean and dry, hung loosely rather than compressed in a stuff sack for months. Long-term storage in a hot loft or a damp garage shortens their life. Wash only when needed, because every cycle wears the fabric a little. On the hill, layer them over a wicking base layer rather than cotton, and accept that condensation happens in hard rain. A well-cared-for jacket and trousers can keep you dry through many seasons of bothies, upland tarns and wet Welsh or Scottish walks, saving money and keeping good kit out of landfill.