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Thread: Plywood, Cork and Track

  1. #21
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    Quote Originally Posted by Gary Rowan View Post
    Note: Homasote is not sold at any retailer in my area.
    If there is a Home Depot in your area, back in the masonry section they sell "expansion joint" material, which is a 1/2" thick, 10 feet long, and 3-1/2" wide strip of genuine Homasote. Downside is, it's only 3-1/2" wide so you would have to use little pieces instead of a full sheet, but it's an idea if you really want to test Homasote as well.

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    Menards sells Homasote; there's one near Branson.

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    Are you going to test them bare, or ballast and scenic them? Ballast and scenery change the noise levels, so doing the test without that is, well... not as valuable.
    Karl

    CEO of the WC White Pine Subdivision, an Upper Peninsula branch line.

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    Quote Originally Posted by jpwisc View Post
    Are you going to test them bare, or ballast and scenic them? Ballast and scenery change the noise levels, so doing the test without that is, well... not as valuable.
    I'm going to test without any ballast and scenery elements. Including the variations on those would introduce to many permutations, more than I would have the time (and probably patience) to test.

    The theory (at least in my feeble brain) is to first optimize the foundation as much as possible.
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    President & CEO
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    I don't always stop for trains, but when ... oh wait!, Yes I do.

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    Sounds like a good sound plan!
    Cheers!
    Gordon
    Rheinland Bayern Bahn
    https://www.nscale.net/forums/showthr...4-x-9-5-layout

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    Homosote was once championed 'back in the day' when 'real model railroaders handlaid rail. Its sole redeeming quality was that it easily accepted and held track spikes. But being a paper product it also tended to delaminate with water based scenery. That and the resultant mess one has when trying to cut it. Most clubs I know use cork on plywood. They only differ in what thickness of plywood they use. I use cork over 1/4 inch plywood on six foot modules. The plywood is supported every inch of the way by piece of 1/8 inch thick hardboard (Masonite) that is cut 1 inch wide. The effect is to have a one inch high beam bridge supporting the roadbed the entire way. Does the same job as one inch of plywood but at a fraction of the weight. As far as sound goes I never thought of it as a problem.

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    Quote Originally Posted by inkaneer View Post
    That and the resultant mess one has when trying to cut it.
    That ain't no lie. Don't cut it indoors if you can avoid it. I once belonged to a club that used Homasote cut in strips for spline roadbed. Worked really well, but you had to soak the Homasote in water with dish soap to make tight curves. It does NOT work without the dish soap.

    In my experience, the delamination worry is minimal. Some people say to avoid OSB for the same reason.
    "Do Not Hump!?!?! Does that mean what I think it means?!?"--Michelle Blanchard

    "People saw wood and say nothing, but railroad men saw trains and say things that are better left unprinted."--Charles De Lano Hine

    Down with UP

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    Quote Originally Posted by inkaneer View Post
    But being a paper product it also tended to delaminate with water based scenery
    The one and only time I used Homasote for subroadbed, I sealed it with shellac to help prevent delamination during wet work. Not sure it made a lick of difference. But the fumes from the shellac? Interesting experience, despite ventilation. ...

    Curious as to where one can and can't get sheets of Homasote. Easier to find in stock the Midwest, I think, than here in the Pacific NW.

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    I have used 1/2in. Homasote over 1/4in. plywood with cork roadbed and have used 1/2in. Foam over 1/4in plywood with cork roadbed and can not tell the difference in noise between them, both are quiet!
    Boilerman

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    Quote Originally Posted by Paul Schmidt View Post
    Curious as to where one can and can't get sheets of Homasote. Easier to find in stock the Midwest, I think, than here in the Pacific NW.
    I live in southern Michigan and I get mine at Menards.

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