What limestone thickness and finish are recommended for Luxury Residential Interior Living Floors, Foyers & Radiant Underfloor Heating Systems?

We recommend 15mm / 20mm Calibrated Large-Format Tiles (600×600mm, 900×600mm, French Pattern) in Sandblasted & Brushed (Velvet Finish) / Softly Tumbled finish, achieving AS 4586 P3 / DIN 51130 R10 Velvet Barefoot Finish (λ = 2.1 W/m·K).

What substrate and adhesive system should be used for Interior Architectural Flooring?

Heated cementitious screed with uncoupling membrane (e.g., Ditra), S1/S2 deformable white adhesive, and perimeter expansion strips. Finish with Zero-VOC water-based interior penetrating stain-stop sealer.

Application Guide · RW-TYAPPL-0118 · Interior Architectural Flooring

Luxury Residential Interior Living Floors, Foyers & Radiant Underfloor Heating Systems

Maximizing thermal conductivity and tactile comfort over hydronic and electric radiant floor heating in open-plan villas, galleries, and penthouses.

1. Structural & Surface Specification Matrix

Engineering Parameter	Mandatory Architectural Specification
Application Category	Interior Architectural Flooring (RW-TYAPPL-0118)
Recommended Surface Finishes	Sandblasted & Brushed (Velvet Finish) / Softly Tumbled
Calibrated Thickness & Profile	15mm / 20mm Calibrated Large-Format Tiles (600×600mm, 900×600mm, French Pattern)
Slip & Safety Compliance	AS 4586 P3 / DIN 51130 R10 Velvet Barefoot Finish (λ = 2.1 W/m·K)
Substrate & Mortar Assembly	Heated cementitious screed with uncoupling membrane (e.g., Ditra), S1/S2 deformable white adhesive, and perimeter expansion strips.
Surface Sealing & Protection Protocol	Zero-VOC water-based interior penetrating stain-stop sealer.