Hi, we are new homeowners to a 1890s house, wanting to put bamboo floors in (which we already purchased by getting a great deal for under $2 a square). We have jacked up the house with beams to straighten the floors to the best, but still have some spots that are 1- 1 1/2 inch off level. We have blown through a 120hours labor and $700 worth of floor leveling material ($29/50lbsbag), and only have completed about one quarter of what needs to be done. It seems like if I use masonary cement mix it would allow for longer dry time thus longer pour time thus equaling more productivity. i am frustrated with every carpenter's opinion, their solutions seem to add up to thousands of dollars. I was trying to bring the floor to at least an 1/8 inch over a 4ft plane, and then use 1/2 inch ply because I have a bundle on site. I know the 1/2 inch is below spec of 3/4, is it really worth buying the 3/4?
So is there any other product to level out the floors? If they floors were 16 on center, it sounds like ripping them down to the beams would have been the best way to go. But that's not an option at this point, as we are already too far into the floor leveler project, as I am already 1/3 done with downstairs. Will Gypcret or some other part floor leveler/ cement mix work? should i glue or nail the floors or drill and screw the subfloors down? Any information is much appreciated!