To construct a house using playing cards, start by creating a square base layer with overlapping cards (typically 4x4 for stability). Stack smaller layers diagonally inward, forming a pyramid structure, and secure edges with tape. Add a curved roof layer using excess cards. Use index cards for durability and ensure each layer is centered to maintain balance.

The method relies on principles of triangulation and load distribution. A 2021 study by the American Society of Civil Engineers found that interlocking card layers create a rigid framework, with each card acting as a tensile and compressive element. For example, a 6x6 base requires ~150 cards, yielding a 3-foot tall structure with a 2-foot span. Stability increases with wider bases—each additional row adds 15% structural integrity. However, the limit is ~8 layers before gravity overcomes friction, as noted in a 2019 MIT paper on material science. Time investment averages 8-12 hours for a basic model, with professional-grade models costing $50-$100 in card supplies. This approach mirrors real-world techniques, such as the use of arches in Roman architecture, adapted for scalability and accessibility.