But if you want to build a floating dock and then forget about it for 20
years foamed filled is the way to go. That's why real floats are foam
filled. Then you don't have "bad" barrels. But you are right about the
price. It takes several hundred dollars to buy that much foam. Then again
you could just decide to do it right with real floats instead of dicking
around on the cheap and ending up with something you're going to be messing
with later.

""UglyDan®©T"" wrote in message
...
(jamesgangnc)wrote
And that's why filling with expanding closed cell foam is a good idea.

In most cases its not needed, costs much more, and you can't control the
buoyancy as easily.
With a shot of 79/21 you just add till level.
What if he wants to add a dockbox, or a swim ladder later on? You just
can't open the bung on a barrel and add or takeout foam, but you can
with air, and on the rare occasion, Its also the easiest way to pull a
bad barrel and replace it. BTDT
Sometimes the simplest way is best. UD