Floating Floor

I had two packs of 1.5m^2 Mahogany Floating Floorboards. These are "engineered" floors, which consist of tongue-and-groove boards with a plywood substrate and a 3mm Mahogany veneer. I bought them purely because they were 75% off at Bunnings, thinking that they could potentially make some nice storage boxes.

After being stored for years, I decided that they would make a good floating floor under my bed - it would make it easier to store things there (especially if I got some boxes with wheels). It also would be a good area to store plywood sheets flat - as this minimises amount of warpage compared to when stored upright.

The tongue and groove on the outer edges of the boards where ripped off using the table saw.

The boards were glued onto 3mm plywood. The rationale here was to prevent unevenness or buckling when the weight of the bed was placed on the four corners. Plywood was bought from Bunnings in 1/3 sheets, so the gluing was done in 3 stages. This was also convenient given the number of weights I had. Shown below is second section being glued.
(Update: In retrospect, I should have also applied glue to the tongue and groove, which would have made the final sheet much more rigid.)

A router was used to add a 10mm radius on the top edge, and a 3mm radius on the lower edge. This helps protect the my feet and the carpet. The edges were then coated with a Stain and Varnish product in "New Jarrah" colour to match the existing finish.

The final result is a beautifully finished floating floor, measuring approximately that of a full sheet (2.4 x 1.2m). And it only cost $20 (Plus the plywood backing that was $22.50!)

(Update: The board remained somewhat floppy after the gluing. To move it upstairs, it was clamped tightly against 2x4s to prevent it from flexing and potentially snapping!)