1. single hung

• How it works: The bottom sash moves up and down, while the top sash is fixed

• Pros: Affordable and energy-efficient

• Cons: Limited ventilation

2. double hung

• How it works: Both the top and bottom sashes slide vertically

• Pros: Better airflow and easy cleaning (often tilt-in for cleaning)

• Cons: More expensive than single-hung

3. casement

• How it works: Hinged on one side and opens outward like a door, typically with a crank

• Pros: Great ventilation and tight seal

• Cons: Can be obstructed by exterior elements (e.g., plants, walkways)

4. slider

• How it works: One or more sashes slide horizontally

• Pros: Easy operation and good for wide openings

• Cons: Can wear down over time; harder to seal tightly

5. picture (fixed)

• How it works: Fixed window that doesn’t open

• Pros: Provides unobstructed views and lots of light

• Cons: No ventilation

6. bay

• How it works: A combination of three windows angled outward from the wall

• Pros: Adds space, light, and architectural interest

• Cons: More expensive and complex to install

Choosing the right type enhances your home’s energy efficiency, natural light, and curb appeal.

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