what would be the best material to use to cover a deck floor made of plywood sheets?
Deck as in outdoor "deck"?
floor sheating inside?
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Remodeling Contractor just outside the Glass City.
I would have never said this if it hadn't been for my retired shipwright FIL, who laid many square miles of it in his carreer.
I can't give you all the details here, but I can tell you it's not terribly complicated.
He put his deck surface down over 45 years ago and other than two coats of gelcoat, nothing has been done to it since. We did ours the same way, covered with basic marine grey gelcoat. I think there might be some pics in this forum somewhere. It's extremely tough, weatherproof, and easy to clean. IMO it's the best.
There have been a few articles in FHB mag over the years; check the archives.
The #1 rule, and I can't stress this enough, is to avoid mixing the hardener to resin mixture too "hot". (Too much hardener). Way too many guys think that if a little bit of hardenr is good, then more must be better, right?
Methyl ethyl ketone peroxide + Polyester resin is a lot like concrete. It's a chemical reaction that never stops. Too much hardener (or Portland cement) will quickly lead to a brittle, crumbling mess.
Do you mean an exterior deck? If so, I would look into Storm System. They are a new line of exterior finishes that are perfect for decks. The best thing about them is that they have a bunch of "categories" based on weather/climate conditions, and each of these come in a variety of colors. Hope this helps.