Floor Finishes – Common sizes of clay/cement floor tiles used in buildings Which of the following standard floor tile sizes are commonly used in practice for interior floors (thickness as indicated)?

Introduction / Context:
Floor tiles are manufactured in a range of modular sizes to suit layout, cost, and aesthetics. Traditional clay/cement tiles and terrazzo tiles have common square formats that simplify setting-out with typical room dimensions and skirting details.

Given Data / Assumptions:

• Conventional square floor tiles for interior use.
• Thicknesses appropriate to material and duty.
• Metric module sizes prevalent in many standards.

Concept / Approach:

Commonly encountered tile modules include 150 × 150 mm, 200 × 200 mm, and 225 × 225 mm, with thickness near 18–22 mm for older clay/cement/terrazzo tiles. Modern ceramic/porcelain tiles may be thinner and larger, but the listed sizes remain widely cited in textbooks and standard rate schedules for basic floor work.

Step-by-Step Solution:

Verification / Alternative check:

Schedules of rates and building construction manuals enumerate these sizes for terrazzo/cement tiles; many historical buildings use these exact modules.

Why Other Options Are Wrong:

“None” is incorrect because each listed module is standard; there is no contradiction among them.

Common Pitfalls:

Confusing modern ceramic thin tiles with traditional cement/terrazzo thicknesses; mixing nominal and actual module sizes during layout.

Final Answer:

All of the above