MATERIAL DATA SHEET

Insulated Glass Unit (IGU), various configurations (24mm, 26mm, 28mm, 32mm total unit)

Glass Assembly
mineral › Glass › Glass Assembly
mineralglassigudouble-glazingthermal-insulationacousticenergy-efficientas4666wers-rated
ATLAS CODE
MIN-GLA-ASY-001
Insulated Glass Unit (IGU), various configurations (24mm, 26mm, 28mm, 32mm total unit)
Category mineral
Material Family Glass
Regulatory Status Non-combustible
Density
2500 kg/m³
Carbon (A1-A5)
12.5 kgCO₂e
Fire Class
Non-combustible
Lifespan
25-30 years yrs
Description

Insulated Glass Units (IGUs) consist of two or more glass panes separated by a sealed airspace filled with air or inert gas (typically argon). The hermetic edge seal system uses primary polyisobutylene (PIB) sealant for moisture barrier and secondary polysulfide or silicone structural sealant. Standard Australian configurations include aluminium or warm-edge spacers with molecular sieve desiccant. Manufactured to AS 4666:2000 requirements with mandatory compliance for all Australian installations.

Primary Sectors
[Residential][Commercial]
Typical Uses
  • Residential windows and doors
  • Commercial curtain wall systems
  • High-rise facades
  • Acoustic barriers for noise-sensitive areas
  • Energy-efficient retrofits
  • Skylights and atriums
  • Temperature-controlled environments
  • Bushfire-prone areas (with toughened glass)
Recycled Content 20
Renewable Content 0
Recyclability 80
Embodied Carbon 12.5 kgCO₂e
Embodied Energy 165 MJ/kg
EPD Available No
Advantages
Significant thermal insulation improvement (U-value reduction 60-70% vs single glazing)Acoustic performance up to Rw 40 dB with laminated glassCondensation reduction through improved surface temperaturesUV protection with Low-E coatings (<1% transmission)100+ year material lifespan with 25-30 year seal warrantyAvailable in multiple configurations for different performance requirementsCompatible with all standard frame systems75-85% recyclable by weight at end of life
Cautions
Higher initial cost ($95-175/m² supply only)Cannot be cut or modified on sitePotential for seal failure in extreme conditionsIncreased weight requires stronger frame systemsCustom sizes have 14-21 day lead timesThermal stress limitations in partial shadingLimited repair options if damagedPerformance degradation if argon gas leaks
CLAD MATERIALS ATLAS PAGE 1 OF 4
TECHNICAL DATA: PERFORMANCE PROPERTIES MIN-GLA-ASY-001
Density (Dry) 2500 kg/m³
Specific Gravity 2.5
Porosity 0 %
Water Absorption 0 %
Hardness 5.5
Surface Roughness 1 μm
UV Resistance excellent
Chemical Resistance excellent
pH Tolerance 7.0-10.0
Compressive Strength 248 MPa
Tensile Strength 28.4 MPa
Flexural Strength 69 MPa
Shear Strength 28 MPa
Elastic Modulus 69000 GPa
Yield Strength 175 MPa
Impact Resistance Grade A/B J/m
Bearing Capacity 3510 kN/m²
Poisson's Ratio 0.23
Creep Resistance excellent
Abrasion Resistance high
Thermal Conductivity 0.038 W/mK
Thermal Resistance 0.59 m²K/W
Specific Heat Capacity 840 J/kgK
Thermal Expansion 0.000009 μm/m·K
Melting Point 1200 °C
Ignition Temperature 700 °C
Sound Transmission Class (STC) 32
Noise Reduction Coeff. (NRC) 0.05
Optical
Light Transmittance 72 %
Light Reflectance (LRV) 8 %
Solar Reflectance (SRI) 0.44

IGUs were developed in the 1930s-1940s with early patents by C.D. Haven (Thermopane) in the USA. Introduction to Australia occurred in the 1970s with local manufacturing established by Viridian (formerly Pilkington) in the 1980s. Mandatory compliance under AS 4666 was introduced in 2000. Current market dominated by argon-filled Low-E units with warm-edge spacer technology providing 10-15% improved thermal performance over traditional aluminium spacers. Australian manufacturing capacity exceeds 2 million m² annually with major facilities in Victoria, NSW, and Queensland.

CLAD MATERIALS ATLAS PAGE 2 OF 4
SAFETY, ECOLOGY & INSTALLATION MIN-GLA-ASY-001
Flame Spread Index 0
Smoke Developed Index 0
Combustibility Class Non-combustible
Ignition Temperature 700 °C
Fire Resistance Rating N/A-NT hours
Heat Release Rate 0 kW/m²
Toxicity of Combustion none
Embodied Carbon (A1-A3) 12.5 kgCO₂e/kg
Embodied Energy 165 MJ/kg
Water Footprint 45 L/kg
EPD Available No
Recycled Content 20%
Renewable Content 0%
LEED Points 8
Circular Economy Score 75 /100
VOC Emissions 0 g/L
Skill Level licensed glazier
Crew Size 2
Installation Time 30-60 minutes hr/m²
Curing Time 24 hours hours
Setting Time 2-4 hours min
Temperature Range 5-35°C °C
Humidity Range 40-80% RH %
Required Tools
Glass suction liftersSetting blocksGlazing packersSilicone sealant gunsSpirit levelMeasuring tape
Certifications Required
Licensed glazierWorking at Heights certificationWhite Card (construction induction)
Weather Limitations
No installation in rainAvoid extreme temperatures <5°C or >35°CWind speed <40 km/h for curtain wall
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COMMERCIAL, LOGISTICS & REGULATORY MIN-GLA-ASY-001
Material Cost $95-175
Installation Cost $45-85
Annual Maintenance $5-10
Lifecycle Cost (50yr) $280
Market Availability excellent
Lead Time 2-5 days standard, 14-21 days custom weeks
Design Life 25-30 years years
Warranty Period 10-15 years years
Maintenance Interval 6-12 months months
Service Temp Range -40 to 80°C °C
Freeze/Thaw Resistance excellent
Dimensional Stability ±1mm per metre
Certifications Held
AS 4666:2000 - Insulating glass units (mandatory)AS 1288:2021 - Glass in buildingsAS 2047 - Windows and doorsWERS (Window Energy Rating Scheme) certifiedGreen Star compatibleNABERS rating contributorZero VOC emissionsNo formaldehyde
Fire Code Compliance
AS 3959:2018 BAL-12.5 to BAL-40 (with toughened glass)
Standards Compliance
NCC/BCA DTS compliant via AS 4666Victorian Building Authority approvedASTM E2188/E2190 - IGU performanceASTM E773 - Seal durabilityISO 9050 - Light and solar propertiesISO 10292 - Glass in building calculationEN 1279 - IGU European standardEN 673 - Thermal transmittance

DISCLAIMER: This specification document is generated from the CLAD Materials Atlas Database. Information is for general guidance only and does not constitute professional engineering advice. Values are typical and may vary by batch, manufacturer, and production run. Verify suitability for specific project applications independently.

ID: MIN-GLA-ASY-001 Schema: v3.0
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