The noise is real. A neighbour through a party wall. Conversation bleeding between meeting rooms. The home office picking up whatever is happening on the other side of the plasterboard. You go looking for a solution and you find acoustic panels — felt tiles, foam squares, fabric-wrapped boards. You put them up.

They don't stop the noise. They were never going to, but that isn't obvious from the listing.

So you look at the other option. A proper soundproofing build — a quote comes back, it involves a plasterer, it means losing a meaningful chunk of the room. And if you're renting, or working in a leased space, it also means a conversation with a freeholder that tends to end things before they start.

Most people stop there. Two options, neither of them quite right, and the noise carrying on.

Why the panels didn't work — and it isn't your fault for trying them.

Acoustic panels and soundproofing solve different problems. It's worth knowing which is which, because the difference isn't obvious and the product listings rarely spell it out.

Acoustic panels work inside the room. They absorb sound bouncing around in the space — reduce the echo, tighten up a room that's too live, make conversation clearer when everyone's in the same space together. That's a real and useful thing. If a room sounds hollow, panels help.

Soundproofing works between rooms. It's about stopping sound from passing through a wall, floor, or ceiling from one space into another. For that you need mass — something heavy enough to resist the pressure of sound waves — and you need decoupling, which means breaking the physical connection that lets vibration travel through the structure. Panels don't do this, and the reason is simply that they're not heavy or structural enough to.

The confusion between the two is understandable — both categories use a lot of the same language. And it turns up in the trade just as often as it does at home. A client wants less noise and a better-sounding room. The person they ask looks at acoustic panels on one side and a full structural build on the other, and the answer to "is there something in between" has always been no.

Until now it has, anyway.

Why nobody has put the two together before.

A proper soundproofing system — decoupled frame, isolation clips, mineral wool cavity fill, acoustic plasterboard — genuinely works. The dB figures are real and independently tested. The reason it has always required a plasterer is that plasterboard needs skimming to produce a finished surface. Once you've skimmed and painted, the build is permanent. For a renter that means you can't do it at all. For a commercial tenant with a dilapidations clause, it's a conversation that needs the freeholder before anyone picks up a drill.

The acoustic panel side is the opposite — easy to put up, easy to take down, looks good — but it doesn't touch what's coming through the wall.

The thing that makes Shell different is a small design insight: instead of skimming the plasterboard, the finish layer is 12mm PET felt panels fixed with a brad nail gun. No skim coat. No plasterer. The felt is the finish. And because it goes on with brad nails, it comes off the same way — which means the whole system, all four layers of it, can be taken down and the original wall reinstated. That's what hasn't existed before: a structural soundproofing build that is also reversible.

Four layers, each doing a specific job.

Shell is a four-layer wall system. The structural core uses the iKoustic MuteClip® — a patented acoustic isolation clip developed with the Acoustics Research facility at the University of Salford, Patent No. 2580959. iKoustic have been making soundproofing systems for over fourteen years. Proper test data, properly developed.

Layer one is a timber stud frame filled with acoustic mineral wool — 60kg/m³, Euroclass A1 fire rated, completely non-combustible. It fills the cavity, addresses resonance, and gives the system the mass that an empty void would undermine.

Layer two is the iKoustic MuteClip® and channel. The clips fix to the existing structure — stud, brick, or concrete — and the channel clicks into them. The plasterboard then fixes to the channel rather than to the wall. Vibration can't travel through a connection that doesn't exist. Clip and channel together add 40mm to the wall depth.

Layer three is 15mm acoustic plasterboard fixed to the channel with standard drywall screws. Rated A2-s1,d0. This is where the mass of the system lives.

Layer four is Felted's own 12mm PET felt panels, brad-nailed into place. No adhesive, no skim coat, no plasterer. The felt is the finish — and because it went on with a brad nail gun, it comes off the same way.

The combined system adds approximately 55mm to the wall. The Bronze figures:

14dB is a perceptible, noticeable reduction — the kind you notice rather than just measure. It's also in the same units Building Regulations use, which matters if you're working in the built environment and need to have that conversation with a client.

To reverse the build: remove the felt panels, take off the plasterboard, unclip the channel from the MuteClip®, unscrew the clips. The original wall is back.

Why the felt is the thing that makes it work.

PET felt — polyethylene terephthalate felt, made from recycled plastic bottles — is worth knowing a bit about, because it has a life outside what most people assume. It's been specified in commercial acoustic installations at corporate headquarters, financial institutions, and major property developments. It turns up regularly at Clerkenwell Design Week. Architects and commercial specifiers know this material well — it's not new to the trade, just new to this application.

The reason it makes Shell possible is simple. In a conventional soundproofing build the plasterboard gets skimmed, which requires a plasterer and makes the build permanent. PET felt replaces the skim coat. It's the finish, it's the acoustic treatment layer, and it's what makes the whole system reversible — all in one 12mm layer. Three things that usually involve three separate trades and three separate costs.

If you're working with a client, the felt finish is the thing they can see and hold before a single clip goes into the wall. Shell is compatible with any panel or tile from the Felted wall panel and wall tile ranges — colours, textures, engraved patterns, tile formats. It reads as a considered interior surface, not a site finish. The NRC 0.65 means it's doing measurable acoustic work at the same time. The fire rating means it meets commercial specification requirements.

The noise problem and the person being asked to solve it.

The renter who has been told that anything real requires permanent modification. The homeowner after a home studio that sounds right and keeps the neighbours happy. The home office worker who needs call privacy and a room that doesn't throw audio clutter back into every meeting. The commercial tenant whose lease ends in three years and who needs to give the wall back in the condition it arrived.

And the contractor whose client is stuck between a structural build they can't make permanent and acoustic panels that won't touch the actual problem. The furniture dealer whose client has panels on the wall and still hears everything next door. The fit-out team who want to install the answer in-house — no specialist acoustic contractor, no plasterer, a finish they can photograph when they're done.

The Bronze configuration installs with basic tools. A drill, a brad nail gun, standard drywall screws. A competent in-house team can do it. Silver and Gold are there for projects that need more — the detail comes with the enquiry.

Why Shell.

A shell is protective and peaceful. It holds something quiet inside it. That's the idea — a wall doing real structural work on the noise, treating the acoustics of the room at the same time, and leaving a surface that reads as designed rather than installed.

We looked for something else that does all three in a single build. As far as we can find, there isn't one. The category Shell sits in hasn't existed before. It does now.