Glass Performance & Sealed Units
How insulated glass, R-values and low-E glass windows affect comfort and energy bills, and why we install Vitrum sealed units, the standard in Western Canada.
What is an insulated glass unit?
Inert gas fill
Dual seal
Glass options
Glazing options compared
Double glazed
Double glazed + Low-E
Triple glazed + Low-E
Best for: Premium builds, north-facing windows and top energy efficiency.
Low-E coating: the invisible upgrade
Reduces heat transfer
Cuts energy costs
Blocks UV damage
Stays clear
Reduces condensation
Reduces noise
Why Vitrum Glass Group
Vitro Solarban
Guardian SunGuard
Saint-Gobain Cool-Lite & Planitherm
Frequently asked questions
What is an insulated glass unit?
An insulated glass unit (IGU), also called a sealed unit, is two or three panes of glass separated by a spacer bar and sealed together, usually with argon between the panes.
What is the difference between R-value and U-value?
R-value measures resistance to heat flow, so higher is better. U-value measures heat loss, so lower is better.
Is double-glazed Low-E enough for BC?
For most BC replacements it is the best balance of cost and performance. Triple glazing suits north-facing windows and premium builds.
Does Low-E glass change how my windows look?
Not noticeably. Unlike tinted glass, Low-E coatings are virtually invisible and keep a clear, neutral appearance.
Will better glass reduce condensation and noise?
Yes. Better insulation keeps the inner glass warmer, which reduces condensation, and multi-pane gas-filled units reduce outside noise.
Does the glass differ between window brands?
No. The window brands we carry all use Vitrum sealed units, so R-values and Low-E performance are consistent.
What does IGMAC certification mean?
It means Vitrum’s sealed units meet high standards for design, manufacture and long-term performance.
Which glass is right for my home?
We recommend a configuration based on your home’s orientation, energy goals and budget. Book a free consultation and we will walk you through it.