It is on the first floor, and the area covers 700 sqft.
Question 1: What type of subfloor is this? I think it's OSB but I want to make sure because when I google particle board subfloor it looks like this in some pictures.
I got a measure from home depot. They said that I need 3/8 inch wood underlayment before I can install 1/2 inch solid bamboo flooring and that it would have to be glue-down.
The glue-down installation is 2.99/sqft plus $1.20 / sqft for the glue. The 3/8 inch wood underlayment is $1.56/sqft. Thats $5.75/sqft just for installation
It seems to me I should rather invest in real 3/4 inch solid hardwood and go with the nail down install $1.99/sqft, or go with engineered click bamboo and have it floated. (stranded bamboo cant be easily refinished so having solid vs engineered isnt a big deal)
Question 2: will I need a wood underlayment no matter what hardwood I choose and no matter what installation is used (float, glue, nail)? ( I know it depends on what manufacture recommends but in general)