Thread: Soundproofing my 90!

I put Dynamat and Dynaliner in just the real loadspace and the footwells and overthe tranny tunnel and then put the LR rubber mats in over the top.Incredible difference it has made. I also put Heatshielding under the tranny tunnel from below using Heatshield and also used wrapping around the exhaust to cool everything down . This has made a significant change to the heat soak the floor picks up.Worth very cent and time an effort to get this done the Car really feels so much more solid to drive. will be doing teh same to my series 2 a shortly to see if i get the same results on the older car!

Appreciate the efforts Pete to share in great detail.

After notching up nearly 4000km over the Christmas holidays, the wife and I did a list of improvements. Sound proofing was one. We have a 7 seater 110, and the novelty of sitting in the rear seat for the kids very quickly disappeared when they realised they were completely missing out on a meaningful discussion because they couldn't hear a thing. It's bad enough talking to someone next to you, let alone 2 rows back!

Though my main priority is fixing the water ingress through the drivers and front passengers door. On the highway, in rain, it doesn't take too long for the drip /spray onto the outer foot. (Insert umbrella emoji).

My only question in doing all this sound proofing properly, is what is the additonal weight? It would add up, and over a long trip, it all makes a difference. That said, our beasts aren't perfect, so there will always be trade offs.

I just had my 110 in for a service. I mentioned the recent heavy rain in Canberra had resulted in lots of dripping on my right foot when i turned right (body roll to left) and the fact that my front passenger foot well gained a small puddle into the deep dish floor mat.

The reply, "I checked with the service team. They said it's a common thing with Defenders."

No **** Sherlock! I didn't worry about pushing the issue this time. I did have a niggling thought about any water ingress that may be ending up on more sensitive things (vehicle wise) than my or my wife's feet.

Thanks guys!

There was a noticeable difference with just the Dynamat installed before I added the Quadzero MLV. But even more so when I added that and the carpet. I cannot comment on just either/or as I put the carpet straight down!

As far as weight is concerned, its really not that much! The QuadZero mass loaded vinyl I used was 4kg/sq meter. So about 20kg all up? Doing the whole car would add about 40kg, hardly noticeable I think...

I won't use the Quadzero in the drivers footwells as I want that area left 'clean' to cater for the inevitable water leaks! But DynaMat certainly will go there.

Very happy! :>)

Nice job!

The option that I went for from Pyrotek is their "Kenworth Matting" product.
It's not listed on their website, but I rang their Victoria branch in Dandenong, explaining what I was after and it was what they offered me.
It is essentially the 4kg/m2 mass loaded vinyl with a 10mm PU 'foam' type material underneath. The vinyl top layer is also patterned to look similar to the stuff already in the Defender, so it doesn't need an additional carpet on top and as the name suggests is what they provide for Kenworth trucks!
The advantage of this is that the vinyl heavy layer is spaced off the existing floor pan by the 10mm of the (waterproof) PU layer. This is more effective in reducing the transmission loss of the floor panel than applying the heavy layer direct to the floor itself (I've waffled on about this in another thread somewhere so I'll see if I can find it...).

It works well for normal road noise (tarmac) but I haven't gone down the dynamat layer underneath yet so I still get a fair bit of panel vibration/resonance over corrugations etc.

Before I did any insulation work, I also parked in the garage and with the brightest LED light I could get I switched this on inside the cabin. I then laid underneath with a tube of sikaflex sealant sealing up everywhere I could see light shining through...!!