Sound proofing

[Essex Stag]

Can anyone recommend a good cheap sound proofing for the floor under the back seat and in the boot area . There are so many at silly prices I was thinking of a felt type substance not the plastic/mastic sound deadening panels but sound absorbing soundproofing felt . I have a thick carpet type felt under the main carpet but nothing at all under the back seat and only sound deadening stick on pads in the boot. Has anyone done their car and did it make a difference.

Derek

[Ian Durrant]

Sorry to say and I stand to be corrected, but as far as I know there is no substitute than adding a heavy close fitting layer to the steel for preventing the panel vibration that causes the most noise. I have looked and looked and the cheapest is the bitumous self adhesive type and I agree it is stupidly expensive for what it is. Felt will dull noise but it will not do anything noticeable to panel vibration noise, that only happens by adding mass from what I have read.

[fedex]

I would'nt fit anything that is going to adsorb moisture, our cars are 'soft' tops and are not the best at keeping water out, the more fibre you put against the floor panels the more rust will be created. also with the roof down I can't see the need for sound proofing. You could always wear earmuffs

[Ian F]

Derek
i used one of the foam type kneeling pads that you see at many of the Classic Shows. About 3mm I think, but it doesn't appear to absorb moisture, did reduce the noise of the diff and is easy to cut to shape. It's not secured though and can be easily removed.

ian F

[Mike Stevens]

Woolies do a good range of sound proofing products, including various felts.

I have to agree about the holding water bit though.

Cheers,
Mike.

[73stagman]

Martrim do a great cost effective sound proofing but again you will need to be prepeared to dry it out quickly if it gets wet.... I used it and will have the same problem. I have glued it to the whole of the inside of the floor. Also it will still need underfelt under the carpet

[jamcarr2]

I have fitted sound proofing pads covered with foam underlay ,I cant say if it works because in the last two years the car has only moved on a trolley jack and that was quite noisy

[peter s]

Sound proofing.

Waxoil under seat cut a plastic sheet to size place on waxoil leave to set then fit sound proofing and if it gets damp it will not rust floor i did this in foot wells plastic stops carpet soaking up waxoil.

[tractorjames]

I was recommended to use the stick on flashing type stuff that comes on a roll from the likes of TP's Its like two layers of tar with metal sanwhiched in between.

I used this on the underneath of my tractor cab which seemed to help reduce the and whining noises and any rattles coming from the transmission area/back end.

Weather it would help with this i dont know but id say it would help deaden any rattles or road noise.


James

[Essex Stag]

Yes James I have a mate who restores cars and said he has used that it is called Flash band and is widely used in the building trade as a lead substitute. It is a very sticky product if lightly warmed with a heat gun it is bitumen based with a thin aluminium or zinc layer comes in various widths 150 mm, 200 mm ,300 mm .and about 3mm thick It does have a limited life outside but inside a car could last quite a while I do have some by me might give it a try.
Derek

[cjp]

I used a product called Dynamat and then felt on top of that, and finally good quality carpet. The car is now as quiet as new. Dynamat is a bituminous product with aluminum foil backing, comes in sheets, can be cut to size, weighs a ton, and does a stellar job of keeping heat as well as noise out of the cabin. Triumph used a similar product over the transmission tunnel so I did not feel it was too out of keeping.

Chris