11 replies to this topic

[Pavel]

Right I need all your innovative minds to help me.

I need to sound proof (not sound quality ICE sound proofing, just road noise reduction slightly) the following since the soundproofing in my car now is falling appart and is a piece of C**p to be honest~!

- Front bulkhead from inside
- Front bulkhead under bonnet
- Bonnet
- Boot, including rear bulkhead from boot (will be covered by boot liner so don't care what sound deadening looks like)
- Doors from inside (must be thin)
- Rear quarter panels from inside
- Floors under carpets
- Parcel shelf

As you probably realise some of those can be quite thick (rear bulkhead, boot, front bulkhead, undercarpet), but some such as the ones that go on the doors must be as thin as possible.

I can't really afford to shell out for dynamat and stuff like that (the rattles don't bother me to that point yet), but if I need to use pro stuff just because you can't make sound deadening so thin yourself I'll use that for the doors...

I've heard many things so please suggest (roof insulation (rubber), cheap house carpets soaked with bitumen, aluminium foil backed polyurethane sheets...)

Ideally want to do the whole car for about 100 quid if possible, like i said I don't need this to have a flawless sound system or anything, just to make the car ride more pleasant!

Cheers

[clubman katie B.F]

am hoping to get a load of sound deadening pads "very" cheaply. these are similar to the ones originaly stuck in the door panels. will keep you informed pav

[Guess-Works.com]

Use flashing tape....

Cheap, and a couple of layers on the floor and bulkhead ( also waterproof !! )

I've done the entire panels of petal ( including the boot )

Edited by GuessWorks, 28 January 2005 - 08:03 AM.

[Guess-Works.com]

I've done the whole car with 6 330mm x10m rolls costing 16 quid a role. with the exception of the roof and double skinned the bulkhead and flor up to the crossmember.

but basically, rear sear squab, back, rear quraters, inside of rear bins, entiire boot, tank, and I have a roll left which will do the doors

[mikesitalianjob]

have you noticed any difference in the noise level as i am toying with the idea of doing this, do you have any pics of the bulkhead?

mike

[Guess-Works.com]

Not on the road yet, unfortunately, but if you hit a panel, it 'thuds' rather than 'tings' if you seem what I mean :erm:

But I've heard the difference it made in one of the Skoda Very fast thingies, and it realy does work.

[dklawson]

GuessWorks, is that what I would call "Duck Tape"?

I used Dynamat but a number of people over here swear by a similar, less expensive product called "Fat Mat". Some of the people who endorse this bought theirs off of eBay at very low prices.

[Pavel]

That's what I'm wondering too. Since nobody here will understand 'flashing' and I want to be able to describe exactly what it is.

If it's duct tape that makes things a lot easier (although that stuff rips the paint right off my car lol)

[Dan]

Nope,

Flashing tape is waterproof roofing tape, for doing the joints/hips/valleys on roofs and sealing under window frames and stuff in the construction industry.

Think a sheet of thin, pliable lead on a roll with an adhesive backing. Various sizes from about 8 to 16 inches width and rolls around 30 feet long. Heavy.

Duct tape isn't dense enough to absord any noise!

You can buy this stuff on E-Bay if you fancy getting ripped off, there was one guy on there once buying rolls from the home centre for a few quid and selling them on on E-Bay for a huge mark up. The E-Bay page said somthing like "bulk buy proffesional automotive soundproofing", and it was the exact same photo you see on the DIY stores website for the flashing tape!

[Guess-Works.com]

Bitumen backed ali tape, very flexible and mouldable, used in conjunction with some mild heat ( eg one of them hairdryers which strip paint ! ) will form a watertight seal to the panel work..

Looks somimit like this..

[dklawson]

What a brilliant idea! I've not seen similar products here but I'll certainly look for it now. Over here you can buy either steel or aluminum flashing but it has no mastik on it. When needed, you apply something like roofing tar to hold it in place and create the seal. I love what you've come up with.

[mikesitalianjob]

if you can try to get hold of some bitumous based primer, rub down any dirty/rusty areas clean, dry, prime, follow instructions on tin then cover with the flashing, also its a good idea to place primer and flashing in a warm place before use do not install if below 5 degrees celsius or cracking will occur.