An open source reference tool for curious homeowners, architects and designers.

This tool pairs materials and methods at random and invites you to explore the relationships between them. Swap the panels to cycle through the library, or let the combinations surprise you.

The library spans stone, timber, metal, surface finishes, and a few unexpected entries — each with properties, typical uses, colour notes, care requirements, and pairing suggestions. Incompatible combinations are filtered out automatically — no galvanic corrosion risks, no acid-sensitive stone next to weathering steel.