I put a layer of brick on the floor, then covered that with tin.
I also put a layer of tin behind it with an airspace between it and the wall.
I remember the first time I got my woodburner working in my house.
The first fire, I remember feeling like a caveman.
"Me have fire in cave". "Me warm, me cook food".
Having a hot fire going, with some food cooking on it, in a warm house during a brutally cold blizzard is still one of my favorite feelings.
Glad to hear you have some of the most expensive parts gathered together already.
I do like the magic heat I put in the chimney.
It pulls heat out of the air leaving the burner and starts heating the place before the mass of the woodburner gets warm
enough to heat the place up.