1) Design Philosophy: System vs. Component Thinking European Approach for Windows and Doors Windows and doors are commonly treated as a complete performance system : frame + hardware + gaskets + glazing + installation detailing (tapes/membranes) all matter equally. Airtightness and long-term sealing are prioritized, often influenced by Passive House / low-energy building methods. North American Approach (More “Component-Based”) Products are often sold and evaluated by glass

When you’re replacing windows in Edmonton, one of the most common questions is: Should I go with sliders or casements? Both are popular, both can look great, and both can be energy-efficient — but they behave very differently in real Alberta weather. At USEDWINDOWSDOORS , we install both styles all the time. Here’s the practical breakdown so you can choose the right one for your home (and budget). Quick definition Slider windows (gliders) A slider window has one or two sashe