So after nailing all those sleepers down, I found out almost instantly that they were not holding.
New Sleepers for Sand Thermal Mass Radiant Floor
![New Sleepers for Sand Thermal Mass Radiant Floor New Sleepers for Sand Thermal Mass Radiant Floor](https://i1.wp.com/mygaragebuild.com/wp-content/uploads/2009/09/IMG_7321.jpg?resize=750%2C350)
So after nailing all those sleepers down, I found out almost instantly that they were not holding.
So the bedrooms are going to have wood floors, specifically nail down wood floors. Therefore concrete is not an option as I can’t nail into it. So the method I choose was to lay out sleepers to support the floor