sound insulation

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JimNm

Member
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Hi. Just doing some much needed sound insulation in my ex-military 110 hard top with LT77 g'box. Fitted close cell foam to rear load space doing the front now. Looking for some carpet or mats to put over the top of foam. It is well used so I'm not looking to make it show room std nor to pay silly money- just being able to hold a conversation with the passenger :). Anyone fitted their own matting/carpets (especially over the tunnel) or have folk gone for off the shelf bits?

Rgds
 
I used 2.4mm alubutyl sound a matting under everything first (link - other brands available) I have it on the bulkhead, footwells, door panels, tunnel, underside of floor panels, and seatbox. I have then covered it with the land rover rubber matting, so have the correct foam backed rubber covers for footwells, tunnel (MUC1621) and seat box, although my seat box one is from a later model that I have then trimmed to fit an lt77.
In the rear i have a big slab of rubber stable matting on the floor which makes a big difference to sound as well as protecting the floor.

With all of the above it is still a commercial 200tdi defender so is a long way from modern car quiet but you can have a conversation without shouting even if it is a little lounder than normal.
 
The closed cell foam (10mm thick) is sound proof as well as thermal. I've used it before on another LR that already had LR original rubber mats in front (so they just fitted over the foam) and it works well.
TBH was looking for something less expensive than the Exmoor trim - do a lot of Scout work with it, so front foot wells get some real hammer at times and something that I wouldn't feel too guilty about replacing would suits me better at the mo - but thanks for the link.
Done the rear load space and covered floor with 5mm ply with rubber mat on top to take some of the impact of loads just thrown in - need matting for area over wheels.
Concentrating on front though. I use hearing aids and my wife go round to suggesting sign language when we're travelling - polite sign language.
Dago19 - saw horse box rubber matting here - https://www.firstmats.co.uk/products/ribbed-rubber-matting-roll?variant=42453672853732 looks good and can take out to hose down.
Roof and sides need doing. Believe it or not the previous owner has stuck short pile carpeting all over them front to back - smells damp in cold wet weather. That's no way to treat our Olivia.
Rgds

Thanks for info guys.
 
Whoops - always read before posting - should have made it clear - real load space has the 10mm foam on the floor with the 5mm ply on top.
 
JimNm said:
Dago19 - saw horse box rubber matting here - https://www.firstmats.co.uk/products/ribbed-rubber-matting-roll?variant=42453672853732 looks good and can take out to hose down.
Roof and sides need doing. Believe it or not the previous owner has stuck short pile carpeting all over them front to back - smells damp in cold wet weather. That's no way to treat our Olivia.
Rgds

Thanks for info guys.
Click to expand...

I was thinking more along the lines of this: LINK i have the 22mm one in the back of mine with the bobble down so you have ribs running the length to aid with sliding things in. I will say prices are a lot more than when I bought it though!

I had similar carpeting stuck over mine that has been removed. Scour ebay and facebook you can find land rover matting that coms up when people replace with carpet etc. I have a tdci seat box cover fitted to my 110 which only needed a little trim to fit the lt77 I have. same with the footwell sound proofing it is from a 300tdi replaced after my engine fire and again a little trimming and it fits neatly enough around the lt77 tunnel. Something like this: LINK I know it has ended but was very cheap for a full seatbox cover.
 
JimNm said:
Roof and sides need doing. Believe it or not the previous owner has stuck short pile carpeting all over them front to back - smells damp in cold wet weather. That's no way to treat our Olivia.
Rgds

Thanks for info guys.
Click to expand...

You're best removing the old carpet. Clean up the panels and then use a Dynamat or Silent Coat on these larger panel areas. The trick is to break up the resonant frequencies induced by engine noise, large tyres, harsh suspension and thin panels [NVH]. Then add 10mm closed cell neoprene foam sheeting, finishing with your preferred nylon carpet. I also highly recommend you add Dynamat or Silent Coat to the inside of the doors, footwells and gearbox tunnel...the sound deadening here transforms the inside of a Land Rover.
 
v8250 said:
Coat to the inside of the doors, footwells and gearbox tunnel
Click to expand...
Agree with the above, these made a much bigger difference than the seatbox did even though I have done all of the cab area I did it incrementally and noticed far more of a difference with these than the seatbox.
 
Cheers guys. So far in cab I've done the passenger side floor tunnel and front of the seat box with the 10mm closed cell foam. Have to work outside so am limited by weather on how much I can get done. Have pieced the tunnel since the panel sizes are small and inherently stiff due to their shape so am expecting bulk of noise to be transmitted from outside rather than due to panel vibration - retired aerospace design engineer and panel stiffen is a common issue but every day's a learning opportunity - didn't know about Dynamat which looks really good for going under the seats and probably under the pedals so as not to restrict travel.
Am due a trip to Scotland soon so will see what happens on the motorway.

Really appreciate the advice and everyone's experiences.

Rgds
 
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