Insulated Glass Units (IGUs)
Double Pane
Two panes of glass with sealed air space between. Standard for modern windows. Significant improvement over single pane.
Triple Pane
Three panes with two sealed air spaces. Recommended for Ottawa's climate. Maximum insulation, reduced condensation, quieter.
Low-E Coatings
Microscopic metallic coating that reflects heat while allowing light through:
- Low-E²: Standard coating, good year-round performance
- Low-E³: Enhanced coating for maximum efficiency
- Passive Low-E: Allows more solar heat gain (good for north-facing)
- Solar Control Low-E: Blocks more heat (good for south/west-facing)
Gas Fills
- Argon: Most common, cost-effective, improves insulation 30%
- Krypton: Premium option, better performance in thinner spaces
- Air: Basic option, least expensive but lower performance
Safety Glass
Tempered Glass
Heat-treated to be 4-5x stronger. Breaks into small, safer pieces. Required near doors, in bathrooms, and low windows.
Laminated Glass
Two panes bonded with plastic interlayer. Holds together when broken. Security and sound control benefits.
Specialty Glass
- Tinted: Reduces glare and heat gain, various colours
- Frosted/Obscure: Privacy while allowing light
- Textured: Decorative patterns (rain, seeded, etc.)
- Low-iron: Extra clarity for unobstructed views
Recommendations for Ottawa
- Minimum: Double pane with Low-E and argon
- Recommended: Triple pane with Low-E and argon
- Premium: Triple pane with advanced Low-E and krypton