Glass Systems

• 1. Introduction
• 2. Classification of Architectural Glass
• 3. Key Performance Metrics
• 4. Glass Selection Logic (Climatic Perspective)
• 5. Advanced Glass Technologies
• 6. Manufacturing of Glass
• 7. Stakeholders in the Glass Ecosystem
• 8. Specification Tips
• 9. Typical Glass Build-ups
• 10. Testing & Compliance Standards
• 11. Glass in the Façade Ecosystem
• 12. Key Takeaway

1. Introduction

Glass is no longer just a transparent material — it is an engineered façade element that defines energy performance, light quality, and the overall architectural expression of a building.

In façade design, glass functions as:

• A visual connector between inside and outside.
• A thermal and solar barrier controlling heat gain/loss.
• A structural component in glazing systems (via laminated or tempered forms).
• A material of expression, defining color, reflection, and transparency.

2. Classification of Architectural Glass

Architectural glass can be classified by its manufacturing, processing, or functional performance.

3. Key Performance Metrics

4. Glass Selection Logic (Climatic Perspective)

5. Advanced Glass Technologies

6. Manufacturing of Glass

A quick primer to frame specifications; full details in the linked page below.

• Source: Float glass line produces the base ribbon; all façade glass starts here
• Primary stages: batching → melting (~1,550 °C) → tin bath float → annealing (lehr) → inspection and cutting
• Value-add processing: tempering/heat-strengthening, lamination, coatings (hard/soft, double/triple silver), IGU assembly
• QA risks to watch: roller wave, anisotropy, edge chips, NiS inclusions (specify HST for tempered façade glass)
• Spec cues: coating orientation (IGU face 2/3), edgework, sealant compatibility

Manufacturing of Glass

7. Stakeholders in the Glass Ecosystem

The architectural glass industry functions through a connected value chain — from raw material manufacturing to façade installation and maintenance.

Each stakeholder adds specific expertise — manufacturing ensures quality, processors enhance performance, consultants ensure correct specification, and contractors execute it on-site.

A coordinated approach between these stakeholders is crucial for achieving safety, performance, and aesthetics in façades.

8. Specification Tips

• Always specify glass as a system, not just material — mention thickness, coating, position, and assembly (e.g., “6 mm SGG Envision SKN 165 on face 2 + 12 mm argon gap + 6 mm clear float”).
• Use neutral tones for corporate facades (low external reflectivity).
• For façades facing South/West, prioritize SHGC < 0.35.
• For daylight-heavy spaces, maintain VLT between 40–50%.
• Include IGU performance values as per EN 410 / EN 673 in your specification sheet.
• Check glass edge sealant compatibility — silicone & PVB often require primer or isolation tape.

9. Typical Glass Build-ups

10. Testing & Compliance Standards

11. Glass in the Façade Ecosystem

Glass interfaces with multiple systems — and in SpecX’s material mapping, its touchpoints include:

12. Key Takeaway

Glass is not chosen for look, it’s chosen for logic.

The right glass transforms façade performance — reducing energy load, improving daylight, and defining architectural identity.

In the SpecX framework, glass systems form the first layer of façade intelligence — linking physics, design, and sustainability into one measurable material decision.