Bubbles Under the Deck Pad — What They Mean and When to Worry

The short answer

There are two very different things people call "bubbles," and they matter enormously:

• A soft bubble under the foam deck pad — where the grippy EVA pad has lifted slightly from the board beneath it. This is usually cosmetic. Your board's air chamber is separate, so it still holds pressure and is safe to use.
• A blister or bulge in the board itself — where the board's own surface is rising, or the board is going out of shape when inflated. This is structural, and you should stop using it and contact us.

The quick test: if the board still holds 18 PSI and keeps its shape, you're most likely looking at the harmless kind. If it's bulging or losing air, treat it as the serious kind.

Why the deck pad kind is usually harmless

The deck pad is the soft, textured EVA foam layer you stand on. It's glued onto the top of the board's outer skin. Crucially, that skin — not the pad — is what holds the air. So if a patch of the pad's adhesive lets go and traps a little air or moisture underneath, you get a raised, spongy bubble under the foam, but the air chamber below is untouched.

That's why a deck-pad bubble typically doesn't affect how the board performs on the water. You may also notice tiny bubbles appearing under the pad while you paddle — again, usually just trapped air or water between the foam and the skin, not a leak in the board.

Why some bubbles do matter

The picture is different if the bubble is in the board's surface itself rather than under the foam pad. A raised blister in the PVC skin, or an area that balloons out of shape as you inflate, can mean the outer layer is separating from the drop-stitch core inside, or that the internal threads that hold the board flat have been damaged. That's a structural issue — the board can deform under pressure — and it needs assessing rather than paddling on.

How to tell them apart

Run through these and you'll usually know which camp you're in:

If you're still not sure after this, don't guess — send us a photo (see below) and we'll help you identify it.

What causes deck-pad bubbles

Nearly always, it comes down to heat. Leaving the board inflated in strong sun, on hot sand, or in a hot car softens the pad adhesive and lets pockets form. Over-inflation adds to the stress. In other words, the same care habits that protect your seams protect your deck pad too.

What to do about it

If it's a cosmetic pad bubble and your board is under warranty: early or spreading pad delamination can be a manufacturing issue, so get in touch before you do anything. Your 2-year Wave warranty covers manufacturing faults, and we'd rather assess it than have you work on a board you could claim for.

If it's cosmetic and out of warranty: a small, stable lift can often simply be monitored — if it holds pressure and keeps its shape, it's largely a cosmetic matter. A specialist inflatable/EVA adhesive can sometimes re-bond a lifted pad, but it's fiddly work and easy to make look worse, so it's worth emailing us for advice on your specific board first.

If it's a structural blister or bulge: stop paddling, deflate the board, and start a warranty claim. Continuing to use a board that's deforming can turn a fixable fault into a ruined board.

When to worry — the red flags

Stop using the board and contact us if you see any of these:

• the board bulges or changes shape when inflated,
• a bubble is in the board's surface, not under the foam pad,
• the board is losing pressure as well as bubbling, or
• a raised area is growing over time.

Prevention

• Keep the board out of direct sun when inflated, and never leave it in a hot car — heat is the number-one cause.
• Don't inflate past 20 PSI — see inflating to the right PSI.
• Rinse and dry after every paddle, and store it rolled loosely in a cool, dry place.

Quick reference

Still not sure?

Send us a photo of the board inflated, with the bubble clearly visible, plus your order number. Tell us whether the board still holds 18 PSI and keeps its shape — that's usually all we need to tell you whether it's cosmetic or worth a closer look.