I'd pay to go to the cinema to watch this !

Update – Roof Treatment Completed

The roof is now finished, with around 95% Silent Coat coverage across the metal skin. Over this I applied a complete multi-layer of 6 mm and 12 mm CCF, then reinstalled the factory felt as the top layer. It’s striking how little sound treatment Land Rover applied to the roof from the factory — the bare metal resonates like a drum until you work it properly.

On the headliner side, I added additional strips of 6 mm CCF. Not a huge amount, but just enough to give a further barrier and to remove the resonance from the headliner board itself, which is little more than pressed cardboard. Care was needed here to avoid adding too much weight and, most importantly, to ensure nothing interfered with the curtain airbags.

The hardest section was the cavity in front of the sunroof. I removed the small rubber grommets on each side and then painstakingly fed in strips of CCF until the space was fully packed — a slow job, but it worked perfectly.

I decided not to completely drop the headliner as I didn’t want the complexity of refitting it around the sunroof cassette. Everything was completed without removing it fully, which saved time and hassle, and the end result has made a noticeable difference to noise levels.

To ensure the headliner was refitted correctly and resisted sagging, I used a strategic amount of Tiger Seal at key anchor points. This has locked everything into place firmly while preserving the clean factory look.

I have to admit that I am fascinated by your work, taking the whole interior out would be enough to make me cry, let alone put it all back together again with the sound deadening to add to the complexity, you have my respect.

Update – Rear Seat Isolation Attempt

The idea of isolating the rear seats with rubber gaskets didn’t work out. Once reinstalled, the extra thickness meant the latch couldn’t grab the bar properly to lock the seats in place. In the end I had to remove the gaskets and replace them with a thin layer of 2 mm Silent Coat. It still provides a degree of isolation, though not as much as I’d hoped, but the tolerances on the rear seats are just too tight for anything more drastic.

I don’t expect the same issue on the front seats, where there’s more room to work with. At one stage I considered modifying the brackets and fixing the rear seats in a permanent non-folding position, but decided against it for practicality.

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I soundproofed the Aston whilst having the interior refinished and my goodness what a difference it made... Astonishing... Good luck with your project sir. I hope your as pleased as I was with my results...

this is incredible -- subscribed.

I sound deadened my doors and trunk and was impressed with the results, this is next level!

can't wait to see the final measurement. Upgrading the sound system while you are at it?

Are you doing the parcel shelf with something as well?

I can't wait to see the end result of all this work. Trouble is, I'll want to do it as well!! Drives:
2010 FFRR TdV8 Vogue - Stornoway Grey
2010 FFRR TdV8 Vogue SE - Zermatt Silver
1998 BMW E36 M3 GTII

Update – Roof, Pillars, and Seats Complete

The last phase has been one of the toughest yet. While the 17–25 mm of layered treatment on the roof didn’t cause major issues when reinstalling the headlining, it still needed careful work. Both the roof skin and the headliner itself (which is really just leather over cardboard) had to be reinforced without damage. I used Tiger Seal selectively to add anchoring strength, but never directly onto the panels or headliner itself, as that would have made future removal impossible. The main challenge here was finding enough anchoring to support the added weight of the treatment and making sure it won’t sag with time or mileage.

The bigger headache has been the up to 25 mm of treatment under the carpet, especially around the rear seat bases. My original idea of using rubber isolation pads under the rear seats proved unworkable – the tolerances were just too tight. After hours of trial and error I had to carefully unpick some insulation, sacrificing areas of the lower quality factory foam bonded to the carpet and even trimming some of the OEM MLV. I also shaved back some of the plastic trim under the rear bench. While I hated compromising the OEM fit, replacing 1–2 mm of ineffective material with proper barriers is more in line with the project’s aim.

In the end the rear seats will still fold, but only with effort – compression is deliberate and everything is very tight. Directly above the fuel tank, space was even more restricted. I had to abandon my thick rubber gaskets and instead use a 2 mm layer of Silent Coat under the brackets, with a second layer built above to catch any leakage (thin Silent Coat + 6 mm CCF + 3 mm MLV). It isn’t the neatest solution, but hidden once the seats are down.

The B-pillars were another marathon. I stripped them right back, treating both the cavities and the trims with a mix of Silent Coat, 6 mm and 12 mm CCF, and 3 mm MLV, while being careful not to interfere with the seatbelt runs. A 2 mm shim was added to the belt guide to keep everything free. Before layering, I also sprayed Boom Mat into the inaccessible cavities – effective, but very messy. Getting the trims back on meant trimming, tailoring, heating, and reshaping plastic to cope with the new bulk. In the end I opted for a mix of OEM clips and selective Tiger Seal on the treatment layers (not on the car body or trims themselves), so the trims are solid but still removable if ever needed.

Finally, I was able to refit the front seats. Here I managed to use 6 mm rubber gaskets under the brackets; once compressed they didn’t upset the geometry, though bolting down evenly was slow work to avoid bulges. I’m not completely happy with the gaps left under the seat frames, but nothing is obstructed. The only minor concern is ventilation under the driver’s seat, as things are tight, but all movement and functions are fine.

That completes the roof, pillars, and seating phases. The results are solid, discreet, and built to last. Next up: the boot area.

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Project Status: Still a Work in Progress
This project is by no means finished, but this video gives a solid view into what has been achieved so far—how much of the car has already transformed and how the cabin is shaping up acoustically.
I’m proud of how far it has come:

Roof, pillars, and seat bases treated with multi-layer Silent Coat + CCF + MLV systems
Refitted headliner, trims, and seat structures with minimal compromise
Deal[/list]t with tight tolerances, latch issues, and weight constraints

There’s still a long way to go—boot floor, bulkhead, wiring paths, and finishing touches remain—but this gives a moment to pause, reflect, and appreciate the sound barrier being built inside.

 2012 Range Rover L322 5.0 SC Autobiography – Sumatra Black
2010 Land Rover Freelander 2 HSE L359 – Grey
2015 Jeep Grand Cherokee Summit WK2 – Grey
1999 Mercedes E320 W210 – Silver

th3chainrule wrote:

can't wait to see the final measurement. Upgrading the sound system while you are at it?

rvbush wrote:

Are you doing the parcel shelf with something as well?

I can't wait to see the end result of all this work. Trouble is, I'll want to do it as well!!

dont forget to reseal the windshield, and get new trim and cowel pieces. Lots of wind noise comes from those pieces as they wear and they lose the seal with the windshield.

That is a good call and yes, I have actually replaced the front screen and all of the seals already!

Did you do the windscreen yourself?