The 8–10% Overage Rule

Overview

Industry-standard overage allowances for natural stone — cuts, waste, breakage, and future repairs by project type.

How-to steps

Step-by-step

1. 1. Standard allowance

   Order 8–10% more material than net field area for straight layouts with minimal cuts.

2. 2. Complex layouts

   Diagonal, herringbone, or book-match patterns require 12–15% overage due to cut waste.

3. 3. Keep attic stock

   Retain 2–3 full pieces for future repairs — natural stone lots vary and matching later is difficult.

Related applications

Apply this guide