Homabed was NEVER made by the Homasote Company, but rather is a separate product composed of (made from) Homasote. Originally made in Kingston, NY, by a company called Homabed (long since closed), then by a company called California Roadbed on the west coast (now closed), and now by a company called Cascade Rail Supply in Puyallup, WA. In all instances the product was (is) made from milled sheets of Homasote and is not a full 1/2" thick. If you're inclined to make your own here's a good article; http://housatonicrr.com/DIY_Roadbed.htm.
Hope this clears things up.
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