Got it—let's dial it up. Here's the list and steps focused on the **extreme-end** stuff: materials that handle 2000°F+ (like furnace or jet-fuel hell), no price cap.
**Materials (for 2000°F+ fire resistance)**
- Refractory fire bricks (core walls, floors, high-heat zones—ceramic, kiln-grade)
- Castable refractory concrete (pourable version—mix it like cement, sets rock-hard)
- Ceramic fiber blankets (thick insulation—wraps everything, blocks heat transfer)
- High-alumina bricks or silica bricks (for spots that need even more melt-proofing)
- Stainless steel 310/321 (structural bits—holds shape longer than regular steel at insane temps)
- Intumescent coatings (extra layer on any steel—puffs up at heat, buys time)
**Step-by-step build (real-world, future-proof construction)**
1. **Foundation**: Pour reinforced castable refractory concrete—mix with high-alumina aggregate. Let it cure 24–48 hours. This base won't crack even if lava flows over it.
2. **Frame**: Use stainless steel 310 beams and columns—welded, not bolted. Coat every inch with intumescent paint (two thick layers).
3. **Walls**: Build with refractory fire bricks—mortar with high-temp cement. Stack tight, no gaps. Back them with ceramic fiber blankets (two-inch minimum) for insulation.
4. **Floors**: Same deal—castable refractory pour over steel decking, topped with fire bricks. Seal joints with refractory mortar.
5. **Roof**: Steel truss coated in intumescent, then layer ceramic blankets underneath, finish with fire bricks or refractory panels. Slope it so heat rises out.
6. **Doors/windows**: Use ceramic fiber-lined metal frames—think industrial oven doors. No glass; use translucent refractory quartz if you need light.
7. **Finish**: Interior gets fire-rated gypsum over ceramic blanket. Exterior? Brick veneer or nothing—looks ugly, survives everything.
Done right, this thing laughs at 2000°F for hours. You'd need a volcano to test it.
