Flooring Assemblies as Layered Control Systems: Area-Based Mapping of Stone/Porcelain Tile Systems in Wet Enclosures and Exterior Decks

Abstract

This paper develops a practical method to specify and coordinate flooring by classifying spaces according to exposure and interface constraints, then assigning a repeatable assembly stack to each class. Using a de-identified multi-zone building program as the working basis, the method distinguishes conditions driven by continuous wetting and vapor, intermittent wetting at room perimeters, rigid stone floors in dry interiors, thin-build threshold conditions, cyclic exterior decks, constant-wetting pool surfaces, wash-down service areas, and built components inside wet enclosures. For each condition, the paper defines the minimum functional layers required for reliable performance and identifies the interface nodes that most strongly govern outcomes (drains, curbs, perimeter returns, openings, and fixed-geometry thresholds). The paper further specifies the minimum content a shop drawing package must carry to make the intent executable, including layout control, seam governance, movement-joint planning, slope/drain definition, and elevation checkpoints. The result is a product-agnostic, teachable specification approach that improves predictability by standardizing assemblies by risk class and enforcing interface closure through documentation.