I have a big picture window facing the street - how do I make it more secure?

Large picture windows can be secured through several effective methods, from reinforced glass to security film and proper framing upgrades. The key is layering multiple security measures rather than relying on just one approach.

Glass reinforcement is your first line of defense. Consider upgrading to laminated glass, which has a plastic interlayer that holds the glass together even when broken - similar to car windshields. This makes it extremely difficult for intruders to create an opening large enough to climb through. Tempered glass is another option that's much stronger than standard glass, though it will shatter completely when broken rather than staying intact like laminated glass.

Security window film is a cost-effective retrofit option that can be applied to your existing glass. Professional-grade security film (4-8 mil thickness) holds glass fragments together when broken and significantly delays entry attempts. While not as effective as laminated glass, it's much more affordable and can be installed without replacing the entire window. The film also provides UV protection and can reduce glare.

Frame and installation security matters just as much as the glass itself. Ensure your window frame is properly anchored to the wall structure - older installations sometimes have inadequate fastening. Consider adding security bars or decorative grilles that serve a dual purpose, though these will affect your home's appearance and emergency egress options.

In Ottawa's climate, you'll want to balance security with energy efficiency. If you're replacing the window entirely, look for laminated triple-pane units that meet ENERGY STAR requirements while providing enhanced security. The outer pane should be laminated for security, while the inner panes focus on insulation performance.

Additional security measures include motion-sensor lighting, security cameras, and alarm sensors specifically designed for glass break detection. Thorny landscaping beneath the window can also deter approach attempts while maintaining curb appeal.

For a comprehensive security assessment of your specific window and recommendations on the best approach for your situation, consider having a professional evaluation. An installer can look at where that window is vulnerable and talk through upgrades that improve security and energy efficiency together.