The Hidden Cost of Scratched Glass
A single scratched floor - to - ceiling window can cost $3,000 - $10,000 + to replace.On a multi - storey project, glass damage claims can easily exceed $100,000.Yet most scratches are entirely preventable with proper cleaning techniques and training.
How Glass Gets Scratched During Construction
The most common causes:
- Dull or contaminated blades: Using the same blade to scrape multiple windows embeds grit
- Dry scraping: Blades must only be used on wet, soapy glass
- Abrasive scourers: Never use steel wool or green scourers on glass
- Contaminated squeegees: Grit particles in rubber blades create scratches
- Improper technique: Scraping against the glass direction or at wrong angles
🚨 The Render Problem
Cement render that splashes on glass and dries is the biggest challenge.Never let untrained cleaners attempt render removal—it requires specific techniques and chemicals to avoid permanent damage.
Professional Glass Cleaning Protocol
ProSan Australia teams follow a strict methodology:
- Blade per pane: Fresh blade for each window, disposed after use
- Pre - inspection: Check for existing damage before cleaning (document with photos)
- Pre - soak: Wet the glass thoroughly with soapy solution before any blade contact
- Angle control: Blade held at precise 30-degree angle, pulled in direction of glass manufacturing lines
- Chemical assist: For render, use optical-grade calcium dissolver—never acid on coated glass
- Final polish: Microfibre cloth finish, no cloth reused between windows
Understanding Glass Types
Not all glass is equal.Modern buildings often use:
- Low - E coated glass: Has a metallic coating that can be damaged by harsh chemicals
- Toughened glass: May have surface impurities from heat treatment that react with blades
- Laminated glass: Edge seals can be damaged by excessive water
Our teams are trained in "Attributes of Glass" to identify and handle different glass types appropriately.
Documentation for Protection
Before any cleaning begins, ProSan Australia documents the condition of all external glass with timestamped photography.This protects both the builder and the cleaning contractor from disputed damage claims.
Need expert construction glass cleaning in Brisbane or Gold Coast ? Contact ProSan Australia for a quote.