"JT" wrote in message
om...
HELP!
I was about to install 800 sqft of 3 1/4 maples hardwood upstairs when
a friend mentioned, hey you have particle board underlayment - you
can't install hardwoods on PB. It seems EXTREMELY difficult to remove.
Should I try to remove it? If so, is there a trick to removing it? Can
I just nail and screw down plywood overtop of it? Any advice you can
provide would be GREATLY appreciated!
thanks!

I some what doubt that you have particle board as flooring. Maybe
OSB/stranded/chip board. These can be used for structural. Particle board is
used for cabinets and shelves.
Better check before you jump