Cargo Area Carpet / Dynamat

[Lightweight]

I spent Saturday finishing a long overdue project. Since the Defender is a daily driver for me I wanted a little less noise from the rear cargo area, I researched a heap of options and came up with the Dynamat extreme underlay with high grade marine carpet over the top. I stripped the back out and gave it a thorough clean, then laid the Dynamat and then finished with the carpet. I am extremely happy with the result both from an aesthetic point and a noise reduction point, when a rock flung from the tyres into the wheel arch it sounded like a gun going off, now it is just a very slight ticking noise! And I can probably stop getting "dad, your car is noisy" each day when I drive Miss 4 to school.

The only issue I have is the very slight lump in the carpet from where each panel of Dynamat was overlaid, but I did follow the instructions.

[inken_dave]

Gday! looks a really nice job! I've got that on my "to-do" list, just wondering if you used any bonding agent, or did you mainly use fasteners? I'm considering using Scotch Velcro with self adhesive backing, so that I can quickly remove the carpet from the floor for cleaning/drying. The side walls could be bonded. I'm also looking at installing cargo rails onto the floor to aid in securing the carpet....

Anyway, certainly improves the sound deadning, great job, thanks for the photo's!

[Lightweight]

Hi Dave,

The Dynamat has a self adhesive backing on it and it is bloody sticky. On top of that I used commercial contact adhesive and then the fasteners are there from the seats, child restraints and the fasteners on the back seat floor around the edges, also there is some capping near the back door where high chance of lift would be. Some purists would say i have detracted from the easy hose out philosophy of the cargo area in the defender, this is why I used the best available marine carpet as it can be hosed out and will last for the life of the car. The noise reduction for me outweighs the disadvantage of the carpet.

[Nera Donna]

Where abouts did you get your Dynamat from? I found some a ‘Strathfields car Stereo’ last time I was home, only place I’ve seen it in Oz and it was pretty pricey.
Cheers
Craig

[flagg]

Good work!

This is what I did, and I'm really happy with the results. Key is also making sure there are no holes anywhere either.

I got a whole heap of velcro to stick the carpet down but was too lazy to install it. Don't think I'll bother now - it hasn't moved at all.

[jimb]

Top job mate.
A few questions.

Did you do the whole way through to the front seats? So under back seats also covered? The Dyno stuff, is it rolls of material or is it patterned for the defender? Can imagine a stanley knife was needed regardless?

Also where did you get it?

[Lightweight]

The Dynamat came from Ryda in Sydney somewhere, i ordered it online, and was $200 for 9 sheets, about 13 sheets are needed so if you can get the sheets in individual or smaller packs I assume you could save some money, I have also seen it on flebay and available from the US. It comes in all different shapes, but I have never seen templates for individual cars. It is pretty easy to apply, peel off the backing, stick down and roll with a vinyl rolling tool. It is very malleable.

>>Jimb,

I removed the back seats and all of the brackets and carpeted to the vertical panel behind the front/passenger seats. There are 8 or so bolts here that i wasn't keen to remove at this stage as they look like they hold the cabin to the tub and If I removed them I was worried that the tub would not realign correctly. Maybe someone here knows more??? I may get around to doing from there under the front seats one day.

[flagg]

Ill post pics when I do the front, after the new firewall us in.

It's really important to wear gloves when you handle dynamat.. it cuts like nothing else and you can't even feel it. I had no idea until I saw blood everywhere..

[Nera Donna]

Thanks for the info gents. All good stuff.
I was just looking around when I spotted the Dynamat in Strathfield, being a Chip Foose fan I had to have a sticky. The guys there quoted me $300 plus for the large pack. I can't remember the exact price but it was over $300 and I can't remember the type of mat is was?
Now I'm a little bit more knowledgeable, I can research it properly.
Cheers
Craig

[land864]

Lightweight

When you say $ 200 for 9 sheets , what is the size of the sheet?

My mate supplies the Avesco cars with a heat and noise shield stuff but I think it's pretty exxy.

I measured up at approx 9.0m2 to do from front firewall right through to rear

Pete

[101RRS]

Clark Rubber sell a similar product but I have no idea how good it is.

Garry

[Nera Donna]

Lightweight

When you say $ 200 for 9 sheets , what is the size of the sheet?

My mate supplies the Avesco cars with a heat and noise shield stuff but I think it's pretty exxy.

I measured up at approx 9.0m2 to do from front firewall right through to rear

Pete

If you get on the Dynamat web site you can follow the links to their Australia distributors. All the info regarding sizes and different applications are there. All good stuff.
Cheers
Craig

[Bushman83]

Hey Lightweight
Thanks for the post. I ordered 3 extreme bulk packs ($128AU each) from Amazon a couple weeks ago. Great to know the stuff actually works! Can't wait to start installing it. :-)

[flagg]

Hey Lightweight
Thanks for the post. I ordered 3 extreme bulk packs ($128AU each) from Amazon a couple weeks ago. Great to know the stuff actually works! Can't wait to start installing it. :-)

What was shipping worth?

[Bushman83]

What was shipping worth?

Shipping was AU$180. Sounds like a lot but when you do the math:
Ryda Car Audio Australia: $236ea + $20ea shipping x3 = $768
Amazon: $128ea x3 + roller + shipping = $582

:)

[alittlebitconcerned]

I had a car trimmer in marrickville sydney strip out all the seats, floor coverings and trims up to the glass level, cover every square inch with dynamat from the back door to as far as he could reach up under the dash, reinstall everything all for $1000. I thought that was pretty good value.

[flagg]

Shipping was AU$180. Sounds like a lot but when you do the math:
Ryda Car Audio Australia: $236ea + $20ea shipping x3 = $768
Amazon: $128ea x3 + roller + shipping = $582

:)

Damn that's good!

[flagg]

I had a car trimmer in marrickville sydney strip out all the seats, floor coverings and trims up to the glass level, cover every square inch with dynamat from the back door to as far as he could reach up under the dash, reinstall everything all for $1000. I thought that was pretty good value.

Nice. Did you measure db before and after?

[alittlebitconcerned]

Nice. Did you measure db before and after?

Unfortunately no, I wish I had.

[alittlebitconcerned]

Here is a great link to how to do the best soundproofing job you can. I hope someone finds it helpful. I've decided to go the whole hog after reading it.


Sound Deadener Showdown - Your Source for Sound Deadening Products and Information (http://www.sounddeadenershowdown.com/cgi-bin/index.cgi)

[Trout]

I just finished putting sound proofing in my 300tdi defender. Made a huge difference. :) No I did not measure before and after but it is definitely worth doing and it's now getting close to being as quiet as my puma. I used 6kg/m2 product from austral insulation in brisbane. Can't remember name but it's a very heavy vynal. 10m roll about $250. Could not lift the roll by myself. Painted floor with 3m stone guard to provide some additional noise reduction. Then glued down s/proof with spray on contact. Filled all holes in firewall with sealant too.

My door seals are rubbish - see daylight and road while driving so I will fix these next. I am also thinking about doing bonnet, firewall on engine side and putting some foil type foam under front floor and seatboxes. If I added up time to do, it would have been about 4 days plus. Lots of work but worth it.

[rockyroad]

As much as I would love to go down this path with my Defender I think I will stick with the "hose out interior".

[alittlebitconcerned]

As much as I would love to go down this path with my Defender I think I will stick with the "hose out interior".

It still remains hose out with the dynamat. It won't hold water and can be scrubbed down.

If you want to go further and use a closed cell decoupling foam and then a noise barrier like mass loaded vinyl above the dynamat, then just install them as loose fit that can be removed. Adhesive Velcro to fix it down works well.

None of the materials absorb or hold moisture and it is still hose out.