Building a Tiny House #1 (Ceiling and Floor)

My first excursion into the tiny house movement came about when I was asked to convert an old Wendy Hut into a living space. This is a 3m x 6m wooden construction, so its rather small, but I got out some paper and a pencil and soon it started taking shape.
My friend Marlon @SimpleEarthSelfReliance suggested placing the hand-basin inside the shower, which I would never have thought of - thereby solving at least one of my space/placement problems, but I digress.
The first task was to put in a ceiling for which I used Isoboard isoboard.com/insulation/
This is a product that I can highly recommend for thermal insulation.
The floor was done with discarded shutter ply which we salvaged from another project.

[@schnauzpig]

good luck

[@stixandst0nes935]

If I may make some suggestions.
Resin flooring. It can be coloured and be made more or less opaque, depending on your wants. It has some flexibility and is easy to work with. Do note, it doesn't like sunlight.
Aluminum windows. You can buy the frame with a window and glass pre-installed, its lightweight and rigid enough that it provides structural support and is super easy to install. They even come in sliding door varieties which can elevate your buildings' look even more.
Structural cable supports. This one I should explain. Beams can be supported with cables using a support that works similarly to a suspension bridge. If you attach the anchor points at opposing sides of the walls, you can improve the beam holding the roof by tightening the cable between the two anchors and, if angled correctly, can even reduce some of the strain on the middle of the beam.
With sheds of that size, its also important to anchor them to the ground in windy areas as the wind can shift them off of their supports. I'd suggest anchoring steel beams in concrete blocks buried at the corners of the shed and attaching the beams to the shed corner'.
Don't forget a small roof placed above the entrance. Preventing the moisture from reaching the door means less chance of a door swelling shut. It can even just be a canvas cloth stretched above the door and between two sticks for the outer points, though I'd suggest something a bit more elegant.