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Old 06-06-2018, 01:32 PM   #1
Great Lakes Greg
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Default Sound deadening in a roadster door

I have a new Brookville door. What do you guys use for a sound deadner? I was thinking of shooting some "Great Stuff" in through the little holes on the inner panel, but am concerned it will expand too much in some places and make trouble with the outer skin. Thoughts?
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Old 06-06-2018, 02:07 PM   #2
SeaSlugs
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Default Re: Sound deadening in a roadster door

NOOOOOOOO! that stuff holds moisture like a sponge. you want the door to breathe otherwise it will rot from the inside out.
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Old 06-06-2018, 02:22 PM   #3
Gary WA
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Default Re: Sound deadening in a roadster door

Lizard Skin look it up great stuff-brush on.
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Old 06-06-2018, 02:56 PM   #4
wrndln
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Default Re: Sound deadening in a roadster door

What I did on the rear doors of my 29 phaeton was buy some rubbery/plastic garden pavers at Menard's (a home improvement store in the upper Midwest). They were about 3/4" thick and about 16" square. They have a fair amount of density and are heavy. I cut the squares into strips that would fit through the large holes on the inside of the doors. The strips were glued in place with some epoxy glue. It made the door way more solid. If you don't understand what I am describing, send me an email or PM.
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Attached Images
File Type: jpg Rubber mat front.jpg (80.8 KB, 89 views)
File Type: jpg Rubber mat side.jpg (53.5 KB, 71 views)
File Type: jpg Phaeton rear door inside w matting.jpg (55.1 KB, 79 views)
File Type: jpg Rear phaeton door last inside material.jpg (52.9 KB, 81 views)
File Type: jpg Rear phaeton door matting done.jpg (59.2 KB, 75 views)
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Old 06-06-2018, 03:09 PM   #5
ronn
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Default Re: Sound deadening in a roadster door

I am surprised that this topic has even come up.

Roadsters are noisy as hell, all open cars are. How the heck is sound deadening going to help? LOL
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Old 06-06-2018, 03:45 PM   #6
Great Lakes Greg
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Default Re: Sound deadening in a roadster door

It does sound counter productive, ronn, but I am after a solid sounding door when it is closed. Without something inside, it sounds like a hollow tin can. I believe the originals had some kind of thick paper / cardboard inside.
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Old 06-06-2018, 05:33 PM   #7
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Default Re: Sound deadening in a roadster door

Greg you are right. I have original doors and they definitely have a sound deadening pad in each door between the outside skin and the large detent in the inside skin. The car isn't on the road yet but I can see where it would make the door a lot less tinny when being closed. Not sure what the material is but I think as long as it wouldn't absorb dampness it would be ok.
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Old 06-06-2018, 05:48 PM   #8
Steve Wastler
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Default Re: Sound deadening in a roadster door

For sure there was sound deadening in some doors, guarters and trunk rumble lids. I like the 6x50 rolls of window sealer from Home Depot or such. It’s rubber, self stick only about 1/8” thick cuts easy sticks well. Can be used to enhance base response from speakers too. Works well
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Old 06-06-2018, 05:48 PM   #9
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Default Re: Sound deadening in a roadster door

One product that may emulate the original tarry substance found in some A inside panels
would be 3m Body shutz spray undercoat . One can get a $15 undercoat gun that fits on top of the bottles of it from Amazon or others and add a plastic extension tube if desired. Stuff drys hard and is waterproof. The foil based insulation that many use can absorb/ retain water especially in cars with operable windows and cowl/rear panels where water drains out thru weep holes, etc. We don't buildup material at the bottom sills around the holes, etc.

Last edited by duke36; 06-06-2018 at 05:53 PM.
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Old 06-06-2018, 06:24 PM   #10
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Default Re: Sound deadening in a roadster door

Do USA doors have the piece of wood inside like our OZ ones do of which most here originated from Canada?
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Old 06-06-2018, 08:45 PM   #11
Randy in ca
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Default Re: Sound deadening in a roadster door

Quote:
Originally Posted by pooch View Post
Do USA doors have the piece of wood inside like our OZ ones do of which most here originated from Canada?
No. Neither did Canadian cars have any wood in those doors.
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Old 06-06-2018, 09:27 PM   #12
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Default Re: Sound deadening in a roadster door

You can use spray insulting foam
Just BE SURE to get non-expanding!
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Old 06-07-2018, 12:44 AM   #13
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Default Re: Sound deadening in a roadster door

Roadster and Phaeton doors are sealed shut at the top, except for the hole for the curtain rod, so no water should get inside if you plug the curtain rod hole with a cork or something similar.
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Old 06-07-2018, 01:48 AM   #14
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Default Re: Sound deadening in a roadster door

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Originally Posted by Randy in ca View Post
No. Neither did Canadian cars have any wood in those doors.

That is good to know.

I would have thought our Canadian CKD kits would have had complete dooors in them.

Every roadster/phaeton door here I have come across has a piece of wood about 4 inches high and is a tight sqeezed fit between the inner and outer skins.
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Old 06-07-2018, 05:13 AM   #15
john charlton
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Default Re: Sound deadening in a roadster door

Australian open cars were part wood construction ,body sills etc etc . This was to add local content and cut down import duties . Other Commonwealth cars were all steel like USA and Canada as there was no local car builder to protect like Holden in OZ .Some OZ built open cars are here in UK but are a pain to restore as the sheet metal has to be adapted to accept repro steel subrails etc etc . To replace the wood would be like a cabriolet restoration for sure .


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Old 06-07-2018, 07:35 AM   #16
Keith True
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Default Re: Sound deadening in a roadster door

My 30 standard roadster has what I was told are straw packs inside of them.They had to be installed when the door was assembled,there is no way to get them in there after assembly.
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Old 06-07-2018, 08:14 AM   #17
Tom Wesenberg
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Default Re: Sound deadening in a roadster door

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My 30 standard roadster has what I was told are straw packs inside of them.They had to be installed when the door was assembled,there is no way to get them in there after assembly.
Yes, my 28 has the same packs. It resembles the old packing material called excelsior.
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Old 06-07-2018, 11:04 AM   #18
BILL WILLIAMSON
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Default Re: Sound deadening in a roadster door

When we had ROOM, we'd brush on UNDERCOATING, from a Gallon Can, stick on squares of Surplus Wool Blankets & brush them over, with UNDERCOATING.
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Old 06-07-2018, 04:39 PM   #19
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Default Re: Sound deadening in a roadster door

Research a product called Dyna-Mat. Lots of hot rod guys use it on their floors, doors and roof.
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Old 06-07-2018, 05:18 PM   #20
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Default Re: Sound deadening in a roadster door

Wood wool - Wikipedia
https://en.wikipedia.org/wiki/Wood_wool
Wood wool, known primarily as excelsior in North America, is a product made of wood slivers cut from logs and is mainly used in packaging, for cooling pads in home evaporative cooling systems known as swamp coolers, for erosion control mats, and as a raw material for ... in hutches and in cardboard boxes when shipping day-old poultry within the ...
‎Terminology ‎Grades and classifications ‎Applications ‎Properties

This is what I have found in several original untouched doors and you can still get it. It looks like the stuff that is frequently used as a soil mat in freshly dug ditches. why not use the the original stuff? But I would put some penetrating sealer on it first.
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