Roof sound deadening?

[Jeremy]

Maybe a daft question but.....

Has anybody ever applied, or thought about applying, sound deadening pads to the roof of a FHC? Is it worthwhile or even possible? Is there a danger of the pads dropping off under their own weight? I realise they would have to cover the whole area, as partial coverage would show through the headliner as bumps.
I ask as the roof is a big tin drum, and lots of cars have stuff glued up there. And because doing the sound deadening and Koolmat will be one of the first jobs when the shell comes home next week.

Thanks!

[Moeregaard]

I think the real challenge here is finding something that doesn't show through the headliner, which is a pretty effective sound damper in its own right. I had loud exhausts on my two FHCs, so I didn't really consider the drumming of the roof panel.

[Bobb]

The car audio folks are the people to talk to as they use/test and generally screw around with everything in an effort to create a perfect listening environment in their cars. This link is to the biggest forum, and is the last post on a thread where an audio engineer tested all the available sound deadening vinyl. You can snoop around the forum and learn a lot.

http://www.diymobileaudio.com/forum/mem ... ng-51.html

This is also an educational site despite being a commercial one...

https://www.sounddeadenershowdown.com/

[Jeremy]

Thanks chaps. I think the main challenge is indeed whether you can put anything up there that won't show through the headliner. Maybe I will talk to the trimmers about it when I get to that stage. Suspect they will tell me to forget the idea.

[Kember17]

The custom car world uses Lizardskin - http://www.lizardskin.com. This is a spray-on paint treatment which can be used for both heat and sound insulation. There are various demos on YouTube. I recall reading somewhere that there is a UK distributor. EDIT - http://www.buzzweld.co.uk/lizardskin-shop.html

Nothing would show through the headlining.

Peter

[64etype]

The wool head liner material in my FHC upholstery kit came pre-attached/glued to a fairly dense foam backing that was about 3/8" thick.

[Jeremy]

Thanks both, I think it's settled. Sounds like the foam backed wool, on its own, is the right answer.

[Joe Burghard]

Jeremy,

It took me a while to get my registeration correct so I could reply but, yes I had the same concern compounded by my location, the southern US, and a black fhc. The heat might soften the adhesive and the pattern of something like sound-deadening tiles would show through. I solved the problem with a loaded, pvc-based liquid called "Quiet Car" (I think). Applies with a roller or brush in as many coats as you wish, easy to get in nooks and crannies, effective in areas which are only partially accessible, and very effective. Since it dries like paint there is no concern about an adhesive surface loosening , seams showing, and you can use it on all surface shapes like wheel wells. Sounds a lot like "LizardSkin" and cost about the same if I recall. Hope the advice isn't too late.

Joe Burghard
'63 FHC