Jacket Delamination – When the Membrane Comes Loose

What delamination actually is

A waterproof, breathable shell is built in layers: a face fabric, a thin membrane and often an inner liner, bonded together into one laminate. Delamination is when that bond gives way, so the layers separate. It usually starts in small areas and at stressed spots – where the jacket flexes a lot, at seams, and where sweat and heat have sat over time. The signs are fairly clear once you know what to look for:

• Bubbles or blisters in the liner on the inside, as if something has lifted beneath the surface.
• An inner liner that has gone crinkly, sticky or 'rubbery' and hangs loose.
• Flakes or peeling of coating that come away when you rub the inside gently.
• Seam tape inside that lifts at the edges and loses its grip.

Don't confuse it with wetting-out or clogged pores

This is the key, because the three problems are fixed in completely different ways – and only one of them is delamination. Know the difference before you spend money on the wrong solution:

• The jacket soaks up water and the outer fabric goes dark and heavy = worn DWR (wetting-out). Fix: wash and re-proof.
• It gets clammy and sweaty inside even though the jacket is intact = clogged pores / poor breathability. Fix: the right wash to open the membrane.
• The liner bubbles, flakes or lifts = delamination. This is a physical failure in the bonding, and neither proofing nor washing fixes it.

Why does it happen?

Delamination is almost always the sum of time and stress, not one single event. Knowing what accelerates it helps you both understand your own jacket and take better care of the next one.

• Age and hydrolysis: many membrane adhesives (especially PU) slowly break down with moisture over years – an old jacket delaminates eventually anyway.
• Heat: the tumble dryer, a hot car, drying on a radiator or strong sun all weaken the adhesive.
• Sweat, body oils and salt left in the fabric because the jacket is rarely washed correctly.
• Storing it damp or tightly packed for long periods.
• Heavy use and flexing in the same spots.

What you can realistically do yourself

Be honest with yourself here: you can't re-laminate a membrane at home, and once the liner has started bubbling over large areas, the jacket is nearing the end. But in some cases you can slow the process and rescue small areas – worth trying before you give up on a favourite.

1. Stop all high heat: no tumble dryer, radiator or strong sun – that's often what drives delamination further.
2. Keep the jacket clean and completely dry; sweat and moisture left in the fabric speed up the breakdown of the adhesive.
3. A small edge of seam tape that has lifted can sometimes be re-stuck with iron-on seam tape and gentle heat through a cloth.
4. A small, contained bubbling patch can be patched from the inside with a repair patch – as a temporary rescue, not a full cure.
5. Keep expectations realistic: this buys some extra life, but widespread delamination can't be reversed.

Make the next jacket last longer

Since delamination is largely about heat, sweat and moisture over time, there's a lot you can do to make your next shell last longer. None of it costs anything – it's mostly about habits.

• Wash out sweat and body oils regularly with the right technical wash, instead of letting them build up.
• Dry the jacket somewhere cool and airy, never on strong heat.
• Store it loose and completely dry – not compressed in a hot cupboard or pack over the summer.
• Avoid needless strong heat, like a baking-hot car in the sun.

When should you send the jacket to us?

If the jacket is a favourite or an expensive one, and you're unsure whether it's worth saving, you can send it to us for an assessment. We look at it and tell you honestly whether a lifting seam or a small area can be repaired, or whether the jacket has reached the end – and if it has, recycling it is greener than throwing it away. If the rest of the jacket is fine but a zip, a tear or a seam has gone, that's an ordinary repair we can take on. You order online, and you see the price before you order.

Frequently asked questions