 | Home > Maintenance & Modifications > Station wagon Soundproofing (sorry!) |
 
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| 2hel Member Since: 28 Nov 2022 Location: Essex Posts: 171   
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Also if anyone has any pictures of their rear tub with the brackets fitted that would help to know if the carpet runs underneath or its cut around.
Thanks  |
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14th Mar 2023 7:39am |
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| TexasRover Member Since: 24 Nov 2022 Location: Paris Posts: 794  
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Assuming you are having a noise issue, please make sure you address any noise source first. No insulation will muffle a high pitch gear whine, a rough engine or rumbling bearing.
Just saying because I have been there and for the same reason I just last weekend changed out a noisy transfer case to a know used quiet one and it is bliss. The biggest problem I find with insulation is how it can trap water and accelerate decay on what is already a vulnerable vehicle. |
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14th Mar 2023 10:08am |
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| donmacn Member Since: 07 Nov 2017 Location: Nth Scotland Posts: 1829 |
^^ that's fair comment - dealing with the basics first.
I used SilentCoat or Dynamat on mine, but having had a quick google it looks very much like the same stuff as Dodomat. If it was me, I'd cut around the brackets/anything else that bolts to the truck. The bitumen in the matting will retain a degree of flexibility and especially in hot weather will 'flow' out from underneath a bracket. That would mean any fixings working loose - they might then rattle which would defeat the purpose of soundproofing in the first place! Then more generally, on the point of water ingress and vulnerability, whenever I take anything apart, before I reassemble I will always consider whether or not to put in some sort of barrier between aluminium and steel. So in the the example you've mentioned of seat brackets, I would consider if there was likely to be enough moisture between the two metals to worry about and if so, I'd put in a thin 'gasket'. If not on the inside, then have a look at the outside and see if the metals are separated. In some instances I might use thin closed-cell foam, or in others a thin PVC or nylon sheet. The sort of stuff that thin chopping boards are made of. You'd never notice one of them going missing from the kitchen.... 
Can't help you with the carpets as my old 110 never had them. Donald 1994 Defender 300Tdi 110 SW - owned since 2002 - 230k miles and going strong (The 'rolling restoration' or tinkering thread: http://www.defender2.net/forum/topic58538.html ) 2000 Range Rover P38 4.0L V8 in the past.. RR classic - fitted with 200Tdi 1984 RR classic - V8 with ZF auto box 1993 Discovery 300Tdi not to mention the minis and the Type 2 VW camper... |
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14th Mar 2023 2:09pm |
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| Linds Hanson Member Since: 16 Jan 2021 Location: Cornwall Posts: 438
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It seems to be the norm these days to buy shares in Dynamat or equivelent and cover every sqaure inch in the stuff as per the sponscered American hotrod shows. Unfortunatley the the bitumen based products are only any use for stopping large unsuppourted flat panels resonating. The damping of these panels can be sorted by a sqaure of deadener stuck in the centre of the panel. The actual noise level reduction is best acheived by a close cell foam with vinyl barrier attached, this does need to be fitted everywhere with no gaps and is quite bulky but effective.
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14th Mar 2023 6:52pm |
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| 2hel Member Since: 28 Nov 2022 Location: Essex Posts: 171
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Thanks for your comments so far much appreciated, I've committed to going ahead with the dodo mat at least, see what it's like after that may add the foam layer but was a little concerned about the fitment of the exmoor carpet set with the increased thickness.
I am tempted to cut around the brackets as suggested and add a thin foam layer / gasket to stop the metal on metal contact. Any pictures of those who have done this on a station wagon would be great to see the method used, pros and cons etc |
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14th Mar 2023 6:58pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11240 
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When I did the rear tub of my old 90, I cut the, Silentcoat in my case, insulation around the mounts. I then made some 1mm rubber gaskets to fit between the seat frames and the tub:
 Click image to enlarge Click image to enlarge There's bit more detail from this post onwards: https://www.defender2.net/forum/post635199.html#635199 Darren 110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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14th Mar 2023 10:01pm |
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| Plumbers91 Member Since: 30 Jul 2020 Location: Manchester Posts: 52 
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I've used Dodo matt closed cell foam and also the bitumen based product in mine, foam on the roof and bitumen on the floor. Very impressed with it tbh, I'd cut around the mounts so you don't gum up the inside of the fixings. Also a good idea to make sure you have a good seal around your doors and firewall to stop sound coming through.
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14th Mar 2023 10:28pm |
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| 2hel Member Since: 28 Nov 2022 Location: Essex Posts: 171
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Brilliant thank you that's exactly what I wanted to see! I assume you let the carpet run under the brackets though? Ie didn't cut carpet around the brackets too? |
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14th Mar 2023 10:38pm |
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| 2hel Member Since: 28 Nov 2022 Location: Essex Posts: 171
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Thanks for the advice much appreciated it seems like I may need to go a step further st some point then  |
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14th Mar 2023 10:39pm |
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| Plumbers91 Member Since: 30 Jul 2020 Location: Manchester Posts: 52
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Takes time to get right
I would also carpet underneath the seat etc, but just cut a line where the holes will be so you can just part it when fitting. Also it's worth heating the dodo matt with a heat gun and then roller the surface to get a nice firm grip to the surface. |
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14th Mar 2023 10:45pm |
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| LandRoverAnorak Member Since: 17 Jul 2011 Location: Surrey Posts: 11240
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No, the carpet was cut around the brackets, too. The seats need to be securely bolted down and carpet doesn't make a good gasket: Click image to enlarge Darren 110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak "You came in that thing? You're braver than I thought!" - Princess Leia |
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14th Mar 2023 10:51pm |
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| 2hel Member Since: 28 Nov 2022 Location: Essex Posts: 171
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Thanks for all the help guys ive 'finished' the rear tub now. starting to contemplate adding a 6mm foam layer to the floor, just a bit concerned about the exmoor carpet fitment with the increased depth? anyone have any experience with carpet fitment, is there enough tolerance?
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24th Mar 2023 1:25pm |
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