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Modern large-area insulated glazing in colorful architecture – made-to-measure aluminum systems featured on Insulated Glass Units: Double vs. Triple Pane
Information · Insulated Glass

Insulated Glass for Aluminum Windows: Double vs. Triple Pane.

Insulated Glass Engineered for Thermal Performance, Sound Control, Solar Protection, and Safety.

Understanding glass

Insulated Glass Units: From Single Pane to Triple Glazing.

The right glazing decides about thermal protection, peace, safety, daylight and summer comfort. This overview clearly shows how the most important types of glass are constructed and where they are used sensibly.

01–03Basic superstructures
04–09Functional glasses
10–11Special solutions
12Decision-making
What is insulated glass?

An insulated glass unit (IGU) is a factory-sealed assembly of two or three panes separated by spacers and insulating cavities. Double-pane glass balances cost, weight and efficiency; triple-pane glass further reduces heat loss and keeps interior glass surfaces warmer. The final build-up must match the aluminum system, element size, wind load, sound, solar and safety requirements. Continue with our aluminum window systems, compare security glazing and RC classes, or review the aluminum windows FAQ.

01–03 · Basic structures

Single, Double or Triple Glazing Compared.

With each additional pane and each insulating intermediate space, the energy performance of the glass changes.

01Historical standard
Glass

Single glazing

It consists of only a single glass pane. In heated residential buildings, this construction usually no longer meets today's requirements for thermal protection and energy efficiency.

Benefits
  • Cheap
  • Simple construction
  • High light transmission
Disadvantages
  • Very high heat loss
  • Hardly any noise protection
  • High heating costs
Typical areas of applicationGarden housesShedsInterior glazingHistorical buildings
02Economic solution
OutsideArgon/airInterior

Double insulating glass

Two panes are permanently connected via a spacer. The interspace filled with argon or air significantly reduces heat loss.

Benefits
  • Good thermal insulation
  • Solid soundproofing
  • Good energy savings
  • Economic development
Suitable forResidential buildingsCondominiumsOfficesModernization
03Modern energy standard
OutsideGasCenterGasInterior

Triple insulating glass

Three panes and two insulating interspaces significantly reduce the heat loss. Inside, the glass surface remains warmer and the perceived comfort increases.

Benefits
  • Excellent thermal insulation
  • Less cold radiation
  • High living comfort
  • Meets modern energy standards
Suitable forNew buildingsPassive housesEnergy savings housesExtensive renovations
04–09 · Functional glasses

Insulated Glass for Thermal, Acoustic, Solar and Safety Performance.

Coatings, films, different sheet thicknesses and surfaces give the insulating glass additional tasks.

↺Heat
04

Thermal insulating glass

A nearly invisible metal coating reflects much of the room heat back inwards while a lot of daylight enters the building.

  • Less heating energy
  • More pleasant indoor climate
  • High energy efficiency
  • Year-round comfort
DeploymentResidential buildingsOfficesBusiness
☼Sun
05

Sunscreen insulating glass

A special coating reduces the solar heat input. Depending on the design, daylight and transparency are maintained at a high level.

  • Cooler rooms in summer
  • Less climate control
  • Reduced glare
  • For Large Glass Areas
Suitable forSouth/West facadesWinter gardensOffices
dBRestraint
06

Soundproofing glass

Discs of different thicknesses, acoustic foils and adapted disc spaces reduce disturbing external frequencies in a targeted manner.

  • Less road and traffic noise
  • Better sleep
  • More concentration
  • Higher living comfort
Ideal forDowntown areasMain roadsRail & Airport
◇Protection
07

Safety insulating glass

Depending on the protection requirement, ESG or VSG are integrated into the insulating glass body.

ESG safety glass

Thermally biased and much stronger. When it breaks, ESG breaks down into many small, blunt crumbs.

DoorsShower enclosuresInterior glazing
VSG · Laminated safety glass

Several panes are connected to a high-strength film. When broken, splinters remain adhered to the film.

Floor depth windowsOverhead glazingBalconiesHouse doors
  • Personal protection
  • Inhibition of burglary
  • Fall protection
  • Protection against glass penetration
▧Private
08

Ornamental insulating glass

Structured or satinized surfaces allow light into the room and at the same time make unwanted insights difficult.

  • Effective visual protection
  • Decorative effect
  • High light transmission
  • Various designs
DeploymentBathroomPracticesOfficesHouse doors
＋Combined
09

Functional insulating glass

Modern glass structures combine several properties in one unit. This creates a solution that is precisely tailored to location, use and safety requirements.

Heat + SoundHeat + SunSun + SafetySound + SafetyHeat + Sound + SafetySun + Heat + Sound
The result

More safety, higher energy efficiency and maximum comfort – without several separate components.

Vacuum
10 · Vacuum insulating glass

Vacuum Glass: High Insulation in a Slim Build-Up.

Between two glass panes there is an almost air-empty intermediate space. Because gas line and convection are greatly reduced, the construction achieves very good thermal insulation at low overall thickness.

  • Very good thermal insulation
  • Slimmer construction than many classic multi-pane structures
  • Particularly interesting for narrow stock frames
  • Suitable for renovation of old buildings and monument protection
Renovation of old buildingsMonument protectionSlim architecture
11 · Special insulating glass

Specialty Glass for Safety, Sound Control and Solar Protection.

Public buildings, industry, clinics, schools and high-quality residential or commercial properties often require further glass functions.

09Special solutions
Fire protection glassAnti-intrusion glassAnti-bullet glassFall-proof glassBird protection glassSelf-cleaning glassHeatable glassSmart glassesAlarm glass with sensors
12 · Decision support

Choose Glazing by Application.

The following orientation does not replace project-related glass dimensioning, but shows the typical direction for planning.

SituationTypical recommendationMain benefits
Unheated ancillary spaceGarden house, sheds, interiorSingle glazingSimple and economical
Home modernizationSolid energy standardDouble-pane insulating glassBalanced insulation and cost
New construction and efficiency houseHigh energy requirements3-fold thermal insulating glassHigh thermal insulation and comfort
Large south/western areaHigh summer heat inputSun protection + thermal protectionLess overheating in lots of daylight
Noise-contaminated siteRoad, railway or airportSoundproofing glassMore calm and concentration
Floor depth, door or overheadIncreased safety requirementESG/VSG in insulating glassPerson, fall or burglary protection
Bathroom, practice or entranceLight desired, insight notOrnamental or satinizing glassDaylight and visual protection
Historical stockNarrow existing framesVacuum insulating glassGood insulation with slim structure
What matters is the overall system.

Glass weight, pane size, frame profile, fittings, installation situation as well as construction and safety requirements must be checked together.

Plan the Right Insulated Glass Unit for Your Project.

We coordinate glass structure, profile, element size and usage into a technically suitable solution.

Glass consultation requestsView aluminum windows

Insulated glass · Thermal performance

A thermal value needs a complete reference build-up.

European Uw describes the complete window. Frame, glazing, edge spacer, unit size and opening type all influence the result.

Read values correctlyUw = frame + glass + edge condition

A published value applies to the stated reference size, glazing and psi condition. Different dimensions can produce a different result.

Project valueCalculate the selected unit build-up

For the actual opening, system, glass, spacer, grids and geometry are evaluated together and coordinated with required U.S. documentation.

For U.S. projects, European Uw references do not replace project-specific U-factor, SHGC or approval documentation where those are required.

Schüco COMPENDIUM 05/2025 · PDF pages 40–49 and 102–110