Flooring – Humidity Level for Bamboo Flooring

1X stock is fine if you have 16 inch on center joists, and the joists are themselves sized properly. Using 2X stock over undersized joists does help make the deck feel more solid. If you have 24 OC joists, I'd definitely stay with the 2X decking. An other option if you have wider joist spacing is to add a joist between each one if possible, then you can use 1X wood or even better, composite decking that will last a very long time, low maintenance and you can have your choice of colors and not have to worry about staining etc.

Benefits are:

• cost (less expensive)
• easier to install (can = less cost if labor costs are involved)
• easier to remove (in case the future owner hates it and/or you need to make repairs)
• uses less finished wood (arguably more 'green' though with bamboo, it's already fairly green to begin with)

Downsides:

• the finished surface is thinner, so you can't refinish the floor as much as you can with solid wood
• being thinner, you may have a different 'feel' underfoot.