Professional inspection of stained glass windows in a restoration studio

Know Exactly What You Have — and What It Needs


A professional condition report is the foundation for every decision you make about your stained glass. Whether you're planning restoration, applying for insurance, or simply protecting your investment — it starts with knowing the full picture.

NSGCG condition reports are thorough, independent, and defensible — created by experts who understand both the craft and the business of stained glass preservation.

What's Included

Our Condition Reports Cover

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Structural Evaluation

Lead matrix, reinforcing bars, slip joints, window frames, and overall structural stability — documented with precision.

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Aesthetic Review

Paint condition, color integrity, historical accuracy, and assessment of any previous repairs or modifications.

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Photographic Documentation

Professional photography using both reflected and transmitted light, creating a permanent visual record of current conditions.

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Historical Research

Background investigation of studios, artists, installation dates, and prior restorations — adding context and value to every report.

Why It Matters

Condition Reports Protect Your Investment


  • Identify problems early — before they become expensive emergencies
  • Provide the documentation insurers need to approve proper coverage
  • Establish a baseline for measuring future deterioration
  • Pair with appraisals for comprehensive asset documentation
  • Give decision-makers the data they need — in plain language
Close-up detail of stained glass showing lead lines and glass craftsmanship
Common Questions

FAQs – Inspections & Condition Reports

Ready to Document Your Stained Glass?

A thorough condition report is the smartest first step. Contact us to schedule an independent inspection.