Invisible Bracketed (Floating) Shelves
The thicker the shelf material, the easier this system is to apply. Use rods one-third longer than the shelf's width. Measure and mark for attaching points on the back of the shelf roughly near the ends, and at similar intervals in between if spanning a wide space (Image 1).
Use a level to draw the shelf's position on the wall (Image 2). Hold the marked shelf up to it and mark the attaching points from the shelf on the wall.
Drill into the wall to a depth that equals two-thirds the width of the shelf. Use a bit slightly larger than the diameter of the threaded rods.
Clamp the shelf securely. Drill at the attaching points to the depth of the holes in the wall, ensuring that the drill stays square to the wood (Image 3).
Inject resin into the drilled holes in the wall, and insert the rods (Image 4). Use a level to ensure that they are exactly straight.
When the resin has set, slide the shelf onto the rods (Image 5). Set a level on the shelf. If it is level, insert resin into the holes to attach it onto the rods.