GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: Waspy on 02 January 2015, 14:38
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I would post this in the audio section but a) It's not technically audio related and b)That section doesn't see much action.
I have finally got my mk2 watertight (fairly sure, more testing will be done) so have decided to rip out the old water damaged carpet and felt and do some sound deadening while in at it, as it is fairly loud on the motorway.
Been reading loads about products such as dynamat and alternatives and a lot of people suggesting flashing tape as it is "just as good, and much cheaper" the just as good part I get as the physics behind it makes sense. It's almost identical weight per metre squared. But cheaper?! Here are my sums.
Dynamat: Amazon, extreme bulk pack £140, 30m square. £4.60 per metre squared.
Flashing Tape: Butyl version (screwfix, don't want a bitumin smell) is £19 for 10m x 15cm roll. So 1.5m squared. £12.60 per metre squared.
What am I missing?! Flashing tape is way more expensive.
How have others deadened their mk2s?
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Used to use old carpet tiles on old Ford floor pans.
They cut to shape and work a treat, hint of bodge about it but who cares when its under your carpet.
Can be had for free if you dive the skips at a building site :lipsrsealed:
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Haha, I'm not bothered about what's under the carpet as long as it works. But do carpet tiles really add enough weight to stop it vibrating?!
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I've got a feeling that you could do about half a dozen Mk2s with 30m², so your price per m² only makes sense if you know a number of other people willing to buy your surplus @ £4.60/m² + P&P (or you have half a dozen mk2s that need doing :grin:).
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In all honesty i have no idea how much I need. It comes in 9 sheets of 32" by 18" so to get 30%+ coverage I was thinking 2 sheets to get good coverage in the boot (obviously a loud part of the car). 1 for each rear wheel arch. 1 for front left and right floor pan. 1 on the roof. Leaving 2 for the doors and misc. Might be wayyyyy out with that estimation though.
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Some dodgy maths in here somewhere.
32" x 18" = 576 square inches = 0.3716m²
9 lots of that comes to 3.34m², not 30m²
:huh:
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Some dodgy maths in here somewhere.
32" x 18" = 576 square inches = 0.3716m²
9 lots of that comes to 3.34m², not 30m²
:huh:
Yep. I was out by a zero. Excellent, I knew I was missing something :laugh:
Ashamed to call myself an accountant :lipsrsealed:
Anyway, that makes the flashing tape much cheaper. As the internet already told me.
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There are some other versions on eBay, from people who have done it how much coverage is needed? I thought it would only require a complete cover onnce over and didn't consider double layers being needed.
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Dynamat recommend minimum coverage of 30% (same should be for a similar product) . So if all of your panels are completely covered, you probably have 3 times that. Doubling up isn't normally required really.
I'm reading a lot of good things around "silent coat", which is about half the price of dynamat.
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If there is a bulk buy that would cover two cars do you wanna go halves?
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If there is a bulk buy that would cover two cars do you wanna go halves?
I've got next week off work so I need to do it this week, might be hard to organise a halvers jobby in time
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I got a pack of Silent Coat.
Front floors, doors and lots of other areas with 1 pack
http://www.ebay.co.uk/itm/like/151155678947?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=108&chn=ps&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0-L&ff12=67&ff13=80&ff14=108&ff19=0
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I got a pack of Silent Coat.
Front floors, doors and lots of other areas with 1 pack
http://www.ebay.co.uk/itm/like/151155678947?limghlpsr=true&hlpv=2&ops=true&viphx=1&hlpht=true&lpid=108&chn=ps&device=c&adtype=pla&crdt=0&ff3=1&ff11=ICEP3.0.0-L&ff12=67&ff13=80&ff14=108&ff19=0
Awesome! I ordered that EXACT product this morning!
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Does it make a huge difference, wanted to strip the rocco and cover every surface, reckon I would need two packs?
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Does it make a huge difference, wanted to strip the rocco and cover every surface, reckon I would need two packs?
Sorry, I meant to reply sooner! I bought 1 pack (40 sheets) and did the whole golf at about 70% coverage. That is excluding the roof. When I redo the headliner I will probs buy a 5 pack to do the roof. I haven't driven it yet to see if it made a difference. It if nothing else thee doors make a really satisfying thud. "Sounds like a golf"
Oh and use gloves! My hands are shredded.
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Any update, want to try and eliminate road noise more than anything.
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Any update, want to try and eliminate road noise more than anything.
It certainly makes a difference! Motorways are much more comfortable. Once I have fixed the passenger window whistle it will amazing. The wind noise is now the dominant noise, rather then the booming, which used to dominate
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Gunna have it a go then, how would you even remove wind noise driving around in a brick aha?
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It is a question which I have been pondering.
The winder mechs have gone so they slip down a little. Which causes a lot of noise. I will then renew the door seals. And window seals. After all that, the wind that gets in is going to have to stay in.