We used these in our basement (old house with stone foundation). They attached to the floor joists and do a great job at holding bins and keeping the floor clear. All metal so no issues with being exposed to moisture. We did have an issue with not receiving the brackets with the shelves. We ended up getting more shelves than needed and had to wait a while until all the brackets showed up. The people I spoke to on the phone were helpful but it took a lot longer than I had hoped to get all the parts.