Sound Proofing Defender 90 TD5

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S

Sambora8080

Active Member
Posts
104
Location
Glossop, Derbyshire
Hi all, i am looking to add some more soundproofing to my defender 90 just to reduce cab noise when im on the motorway.

So far i have seen that paddocks offer a kit which they say will fit my defender td5 county for around £80 they say its all pre cut pieces of like hessian material that does under the bonnet and footwell areas and around the bell housing. You just spray glue it down.

I was wondering though whether anyone had experiences with this or could put forward any suggestions. I dont want to spend a fortune or be completely dismantling my landy.

I was kinda thinking of say something under the bonnet the foot wells and gear box area, and perhaps lifting my seats and rubber mat in the rear and putting some insulation under there.

What do you think?
 
lots of ways

pikey way is roof flashing with something foam like on top.. like camping mats.

or you can buy 'proper' sound deadening mats for the boom and foam for higher pitches and whole thick rubber coverings.

or you can buy rolls of it all yourself and cut to fit. lots of options. :)
 
I'm literally in the process of buying sound deadening for my Defender and have done quite a lot of research.
I don't know what the material is in the kit from Paddocks, it just looks like carpet to me.
Anyway, for what it's worth, my research has suggested you need to reduce the sound generated by the car and then reduce the sound entering the car. The Dynamat equivalent stuff is used to reduce panel vibrations which stops the car itself acting as a speaker and making noise but from what I understand it isn't very effective at reducing sound levels from sound entering the car. This must be blocked. The best way to block sound is by using something dense which seems to come in the form of mass loaded vinyl (MLV) for automotive use. This material must be decoupled from the vehicle first so that it doesn't resonate and this is done with a closed cell liner, I'm thinking camping mat for this but proper liners can be bought if you want. Try looking on Sound Deadening Shop - Car Van & 4x4 Automotive Sound Proofing They have the best prices I have found, and I have looked in a lot of places!
I'm hoping for good results, hope this helps.
 
AJJackson1 said:
I'm literally in the process of buying sound deadening for my Defender and have done quite a lot of research.
I don't know what the material is in the kit from Paddocks, it just looks like carpet to me.
Anyway, for what it's worth, my research has suggested you need to reduce the sound generated by the car and then reduce the sound entering the car. The Dynamat equivalent stuff is used to reduce panel vibrations which stops the car itself acting as a speaker and making noise but from what I understand it isn't very effective at reducing sound levels from sound entering the car. This must be blocked. The best way to block sound is by using something dense which seems to come in the form of mass loaded vinyl (MLV) for automotive use. This material must be decoupled from the vehicle first so that it doesn't resonate and this is done with a closed cell liner, I'm thinking camping mat for this but proper liners can be bought if you want. Try looking on Sound Deadening Shop - Car Van & 4x4 Automotive Sound Proofing They have the best prices I have found, and I have looked in a lot of places!
I'm hoping for good results, hope this helps.
Click to expand...

you can go nuts.. but generally bought cars have a patch of dense material covering 25% (square) on the panel first to stop the vibes and give the golf 'thunk' sound. then as you have said foam with rubber/carpet glued on top.

i'd try those first and see how you get on.

one thing with the cheap bitumen roof flashing is if it catches fire it burns really well :D

oh also if it's a van, if you say stick up some foam where you would have a dog guard, so it's a closed cab, it makes a difference.
 
AJJackson1 said:
I'm literally in the process of buying sound deadening for my Defender and have done quite a lot of research.
I don't know what the material is in the kit from Paddocks, it just looks like carpet to me.
Anyway, for what it's worth, my research has suggested you need to reduce the sound generated by the car and then reduce the sound entering the car. The Dynamat equivalent stuff is used to reduce panel vibrations which stops the car itself acting as a speaker and making noise but from what I understand it isn't very effective at reducing sound levels from sound entering the car. This must be blocked. The best way to block sound is by using something dense which seems to come in the form of mass loaded vinyl (MLV) for automotive use. This material must be decoupled from the vehicle first so that it doesn't resonate and this is done with a closed cell liner, I'm thinking camping mat for this but proper liners can be bought if you want. Try looking on Sound Deadening Shop - Car Van & 4x4 Automotive Sound Proofing They have the best prices I have found, and I have looked in a lot of places!
I'm hoping for good results, hope this helps.
Click to expand...

Just looking on the site, the 4m sq of silent coat looks good value for money. Could do the whole 90 for £85
 
I need to do mine, currently got no rubbers around the doors either so cant hear yourself think lol! I'm going to fill the back panels cheap and then ply with some nets for storage but not sure about the front?7

You must have to put the radio so loud to hear it in a defender? ;)
 
Thats a very interesting website, looking at that then i would say
some of this in the rear boot area of my defender

Silent Coat Extra 4mm Mat Bulk Pack – Sound Deadening Shop

followed by a few of these


Dodo Sound Stopper MLV – Sound Deadening Shop

That would be a good covering and should make a significant impact. Its also enough money to spend for the first stage i suppose.

What products do they offer that you can use under the bonnet? Ive not seen any but you obviously need something heat proof that you can apply to the the underside of the bonnet.

I have also seen pre made pieces on ebay for like £99 that you can just fit but i dont know how good these are? They look like they might be land rover ones though?
 
Sambora, I too was tempted by the 4mm stuff but after thinking about it I reckon it's not worth it as it is still only the vibration reducing stuff, not the sound blocking stuff. As Trax mentioned, a 25% coverage is usually enough to reduce the vibrations and so buying a product twice as thick and doing a 100% coverage seems to be a doubly defunct method. I would like to know this for a fact though.
Also, make sure you isolate the MLV or it won't make much of a difference.
With regard to under bonnet stuff, look on The UK's Leading Land Rover Soundproofing Specialists | Car Soundproofing | Industrial Soundproofing | Marine Soundproofing they have a few products. I tried open cell foam with a decibel meter though and it made 0 difference.
 
thanks for your reply jackson im getting a little bit confused now, i have read through that many different products and websites i dont know what day of the week it is.

All i want is something that definitwly works without paying an arm and a leg.

you mention about isolating the MLV but what do you do this with?

Can you not just lay that 4mm matting down and seal all the joints up with aluminium tape and then lay one of those foams straight over the top?
 
ive started with silent coat. bought a 2mm bulk pack and used it at 100% coverage over seat box, footwells, tunnel etc and what i had left after all of front, i had enough to 100% cover one rearwheel box and half of the other!!

i was only gonna use it over 50% to go twice as far but once all seat and mats were out, decided to just do the lot! glad i did, as some of the panels have so much drumming resonance that even 100% of 2mm isnt enough!!! on the large panels i put extra 25% coverage. so effectively 4mm and that DID stop the drumming and really make them thud!! as mines a 110 and ive effectively only done a 1/4 of it so far with silent coat. it has stopped a lot of front end rattles !
also done a bit with MLV that really helps block the road and tyre noise, but again haven't finished that yet!
 
Okay so it sounds like buying the bulk pack of 4mm is a good start and 100% covering he areas I'm going to do.

How far do you think the bulk pack of 4mm matting would go on a 90 station wagon.
Would you suggest using the MLV matting everywhere that you apply the 4mm matting?
 
just looking at the 4mm stuff. i think you would be cheaper doing what i did. cover everywhere in 2mm. then on the big areas add extra layer of 2mm in centers of big panels. it will cost a fortune doing everything in 4mm. and i think there is only 24 sheets in the 4mm bulk pack so will only cover half as far!
i would guess at 3 bulk packs (2mm 40 sheets per pack) to cover your 90 100% maybe more.
MLV and ccf should be 100% coverage right up to windows, so like a bath tub!!
then roof and side panels can have sound absorber fitted!
 
You see in my defender its a county station wagon with the rear seats and windows but i dont have any lining on the sides in the rear. Which means i wouldnt really want to apply insulation there as i would have nothing to cover it.

In an ideal world i was hoping just to apply the 2mm matting all over the rear load area all over the front area where the gearbox and foot wells are and then apply the MLV over the top.

i was also hoping to apply something under the bonnet. to hold back the engine noise.

its mainly engine noise at 60mph that i dont want.

DO you think as above would work well? I didnt want to spend more than £250 but it doesnt look like its going to happen does it haha
 
that should still help! most of the noise does come through the floor!!
ive got a noise killer engine blanket on mine. doesn't make much difference but i suppose it all helps!!
 
I'm thinking of doing the 2mm stuff everywhere.

My body is off the chassis at the mo, so I'm trying to think of places to put it that I wouldn't be able to with the body on. Is the stuff you used waterproof, as in could I use it in the engine bay?
 
I don't know if you have this issue sorted yet mate, but I have done the sound proofing on my TD5 as the noise on the motorway was really bad when I first had it.

Sound Deadening Felt Pads | Frost Auto Restoration Techniques

I got some of the Thermo-Coustic matting for my cab which made a massive difference. and it cut out a lot of the heat transfer I was getting off the transmission. now with the addition of some new carpet I can actually hear the stereo.
:D
 
Right guys, I just spent £175 on products today and they will be delivered Monday and hopefully fitted pretty damn soon after.
I have done a few test runs and I seem to get between 95 and 100dB at 55mph with no sound deadening. I will report back with my findings early next week.
Just so you all know, my strategy is 100% 2mm silentcoat coverage, maybe double up on the big panels as suggested, 100% camping mat (closed cell isolator), 100% MLV.
I'm hoping for good results!
 
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