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Thread: Source for E24 Foam Underflooring?

  1. #1
    Join Date
    Mar 2012
    Location
    Farmington, CT
    Posts
    33
    My Cars
    1988 BMW 635

    Source for E24 Foam Underflooring?

    I'm not sure what the proper term is but the foam underneath the carpet was soaked and falling apart. Is there any third party source for the E24? If not, what materials should I track down and where should I look for it? I've finally fixed this '88 after 5 years and I can't wait to put it all together, the foam is the biggest obstacle right now.

  2. #2
    Join Date
    Aug 2014
    Location
    Lutz, FL
    Posts
    1,356
    My Cars
    '85 635 CSi Euro 5sp.
    Are you looking for something that's concours-correct, or something that is better than original? If the latter, there are lots of choices, but I like FatMat:

    http://www.fatmat.com/shop/75-sq-ft-...included-26112
    Dean
    Lutz, FL

    '85 635 CSi Euro #9402254
    '87 Spider Veloce
    '92 Spider Veloce
    '08 350Z


  3. #3
    Join Date
    Apr 2008
    Location
    Scottsdale, Arizona
    Posts
    4,885
    My Cars
    81 euro 635, 4.4 X5
    I used 3/16" neoprene over 1/2 foam. If you look at yours you will see that is pretty much factory
    Last edited by Bert Poliakoff; 06-22-2017 at 05:37 PM.
    81 Euro undergoing total nut and bolt restoration
    pictures at: flickr.com/photos/bertsphotos

  4. #4
    Join Date
    Apr 2004
    Location
    Anacortes,WA
    Posts
    1,300
    My Cars
    E34 535i; E36 325is
    Look into Frost King heating duct insulation from Lowe's or Home Depot, about $1/square foot for a 15" X 15' roll. This is aluminum foil backed adhesive foam about 1/8" thick and is designed to insulate heating and air conditioning ducts as are common in attics, etc. Dampens noise about as well as Dynomat and its competitors, for a fraction the price and weight. Conforms well to shapes such as car floorpans and roofs. Waterproof. Seal edges with aluminum foil tape (much like duct tape) and it's waterproof. Thin enough to fit between door cards and the door sheet metal, so soundproofs doors, too, and sunroofs, underside of hoods, etc.

  5. #5
    Join Date
    Sep 2016
    Location
    North Florida
    Posts
    111
    My Cars
    1983 633csi, 2017 540i
    I have used frost king beneath rear seats, doors, and trunk. About $100 to do all that. Made a noticeable difference.

  6. #6
    Join Date
    Mar 2012
    Location
    Farmington, CT
    Posts
    33
    My Cars
    1988 BMW 635
    Frost King and Fat Mat look like great alternatives. I'm going to take the interior out completely first and remove all the adhesive and rust spots

  7. #7
    Join Date
    Apr 2005
    Location
    Savannah GA
    Posts
    651
    My Cars
    '73 ///M2, '85 ///M635
    You may want to research further on what products to use to mitigate rattles vs. road noise. I think the Frost King stuff is more suited to minimize the former. But I'm far from expert.

    Cheers,

    Ray

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