Car soundproofing in boats

colhel

colhel

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Being a cheapskate, I'm wondering if old car soundproofing material can be used in a boat and how effective it would be. Has anyone tried it? Could it be glued into place? If so, what glue?
In my case it would be for a 23ft yacht, single cylinder diesel under the cockpit, so I'd be looking at putting some behind the companionway steps and under the cockpit floor.
Oh, the boat goes back in Tuesday, so I'll have to rush it! :)
 
As far as I can tell most car sound proofing is to stop wind and road noise and to stop metal pannels vibrating so it's mainly foam and fairly dense rubbery stuff, and burns well.

Boat sound proofing is mainly to isolate the engine from the rest of the boat so it's flame resistant foam and lead adsorbant to fit in the engine compartment.

I don't think car stuff will be good on a boat. IIRC someone on here sells the stuff for boats but I don't recall who and I can't remember seeing him for quite a while.
 
The stuff I'm thinking of using comes from an old Toyota Estima, the engine is under the front seats, The soundproofing looks like a thin fibreglass type material, okay there are metal sealed panels which would probably do a lot of the soundproofing themselves. I don't expect superior results but would like improvement.
Being that this material is inside the car, and looking at what it's made from I'm fairly confident it's fireproof, but if I try and light a bit with a flame would this be okay to check?
 
The most effective stuff is sold by Noisekiller
http://www.noisekiller.co.uk/

I used their self adhesive foam/lead sandwich type to good effect but its not cheap.
You really need something with a high mass barrier to block the sound - foam or fibre types will just absorb the higher frequencies which are probably not the main noise from your engine.

Anything is better than nowt though.
 
colhel said:
Being a cheapskate, I'm wondering if old car soundproofing material can be used in a boat and how effective it would be. Has anyone tried it? Could it be glued into place? If so, what glue?
In my case it would be for a 23ft yacht, single cylinder diesel under the cockpit, so I'd be looking at putting some behind the companionway steps and under the cockpit floor.
Oh, the boat goes back in Tuesday, so I'll have to rush it! :)
Click to expand...

how about Rockwool thermal ,fire and sound insulation 30mm 1200x600 £17
 
I wouldn't waste time and effort on an inferior installation. You really need high mass sheets like Soundkiller or Halyard supply. It is expensive though and needs to be installed carefully with no gaps and re-jigging the engine compartment so that filters etc. are accessible is very fiddly. In the long run though, the money, time and effort is worth it. You'll only save money on materials if you use 'make-do' stuff - your time and effort will be the same.
 
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