Ran into cinder blocks when running nail-down flooring
I'm nailing down ~3/4" stranded bamboo on top of the original 3/8" hardwood. 700 square feet, everything is great (other than the squeaks!!), until I get to the last 8 square feet. There is a fireplace in the basement, and on the main floor, the top of the cinder block from the fire place is at floor level. The top is 1/4" under the level of the 3/8" hardwood, with no moisture issues whatsoever.
Any suggestions on how to handle this since I can't nail into the flooring? Self-leveling compound and glue-down the bamboo? What would go between the bamboo and self-leveler? 1/4" subfloor onto the cinder blocks and then glue-down the bamboo? ANYTHING else???
Oh, I found the cinder block after pulling up carpeting.