Angled to catch maximum sunlight during winter, the dark-painted sloped roof absorbs solar heat throughout the day while funneling rainwater away from the front door.
+-------------------------------------------------------------+
| SLANTED-ROOF SOLAR HEAT TRAP |
| |
| +-----------------------------------------+ |
| | HIGH REAR WALL \ |
| | [ Mylar Heat-Reflective Lining Inside ] \ [ ROOF ] |
| | \ |
| +--------------------+------------------------+ |
| | LOW FRONT WALL | [ 6-INCH ENTRY HOLE ] | |
| +--------------------+------------------------+ |
+-------------------------------------------------------------+
How to Build
- Cut the side panels of a rectangular box at a 20-degree incline from back to front.
- Wrap the top roof panel in black plastic trash bags or spray-paint it matte black to absorb sunlight.
- Line the interior with heat-reflective foil and pack the bottom with fresh straw.

6. Two-Door “Escape Hatch” Safety Box
Feral cats prefer shelters with two exits so they don’t feel trapped by predators like dogs or coyotes.