Whats under the carpeted deck in late 70 to early 80 GW's?

gdavies07

Seaman Apprentice
Joined
Oct 26, 2011
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I've been looking at a few older GW's in the 17-18' range and they have what looks like carpet or vinyl deck covering. Whats under that? Did GW use fiberglass over plywood underneath or should I expect to see the decks covering glued directly to marine plywood?
 
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