Interlayer + IGU Spacer

Interlayer + IGU Spacer are two important components used in modern insulated and laminated glass systems, especially for safety, thermal insulation, and structural performance.

1. Interlayer

An interlayer is a thin layer of material placed between two or more glass panes to bond them together, creating laminated glass.

Common Interlayer Materials

• PVB (Polyvinyl Butyral) – most common for architectural laminated glass

• SGP (SentryGlas®) – stronger and used for structural applications

• EVA (Ethylene Vinyl Acetate) – often used for decorative or specialty laminations

Functions

• Holds glass together if it breaks (safety)

• Reduces sound transmission (acoustic insulation)

• Blocks UV radiation

• Improves security and impact resistance

Example Structure

• 5mm Glass + 0.76mm PVB Interlayer + 5mm Glass = 10.76mm Laminated Glass

Common applications include:

• Glass balustrades

• Skylights

• Shopfronts

• Laminated safety windows

2. IGU Spacer

An IGU Spacer is used in an Insulated Glass Unit (IGU). It is the material separating two or more panes of glass around the edges.

Typical Structure

• Glass Pane

• Spacer Bar (filled with desiccant)

• Air or Argon Gas Space

• Second Glass Pane

Functions

• Maintains the gap between glass panes

• Holds desiccant to absorb moisture

• Improves thermal insulation

• Reduces condensation inside the unit

Common Spacer Types

• Aluminium Spacer – traditional type

• Warm Edge Spacer – better energy efficiency

• Stainless Steel Spacer – stronger and more durable

Example IGU

• 6mm Glass + 12mm Spacer + 6mm Glass = 24mm Double Glazed Unit

Applications:

• Residential windows

• Commercial curtain walls

• Energy-efficient glazing systems

✅ Simple Comparison