It's a bedroom, likely bed head agaisnt that wall anyway so it'll be quite unseen. Then in a year or two our son will move into that room when he comes out of his nursery, and I'll put a suitable floor for a kid.
If you put concrete in, you'll then have more of a problem down the line. Wouldnt you want something easy to take up that can be hidden with the bed/side table?
It's a bedroom, likely bed head agaisnt that wall anyway so it'll be quite unseen. Then in a year or two our son will move into that room when he comes out of his nursery, and I'll put a suitable floor for a kid.