Tall glazed living space illustrating a thermal-glazing application

Glass Glazing

Thermal double & triple glazing

Compare glass-unit choices for heat retention, thickness and weight.

  • Low-E glass-unit options
  • Double- and triple-glazed configurations
  • Warm-edge spacer consideration

Product details

Consider the glass and the whole window.

Large glazed openings overlooking a pool at Villa Meg in Lignano SabbiadoroView full size

Thermal glazing works as a complete sealed unit: low-emissivity coatings, gas-filled cavities, spacers and edge seals all contribute. Double glazing offers a single cavity, while triple glazing adds a pane and a second cavity.

A lower centre-pane glass value does not by itself describe the whole window. The frame, edge detail, unit size and installation affect the finished result, while the chosen system must support the added depth and mass.

Your choices

Balance warmth, depth and weight.

Double or triple

Compare the target thermal performance with the frame capacity, weight and opening requirements.

Complete specification

Coordinate coatings, cavities, spacers and any acoustic, solar or safety needs.

Specification

At a glance.

Brochure double-glazing example
Ug 1.0 W/m²K centre-pane value
Brochure triple-glazing example
Ug 0.5 W/m²K centre-pane value
Whole-window result
Uw depends on the complete window configuration

aWindow installations

Glazing for the rooms you live in.

Start with the room and the way you use it. These aWindow installations show different openings to consider when discussing a glazing specification.

Your project

Review the complete window specification.

Tell us which frame system or existing window the glass is for, and share any target thermal performance. Include opening sizes and other acoustic, solar or safety needs when comparing double and triple glazing.

Discuss Thermal double & triple glazing