--- title: "Types of window; window for more light" subject: "Building Technology" chapter: 6 key: "semester_6/building_technology:window-types-light" source: https://www.bctengineer.com/q/semester_6/building_technology/window-types-light site: BCT Engineering --- # Types of window; window for more light Building Technology · Chapter 6: Doors and windows - Asked in: 2079 Chaitra, 2+3 marks - Video: [Types of Windows | Windows | Building Construction](https://www.youtube.com/watch?v=nvzyTvqxw3s) — SGK Online Education - Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14 - Page: https://www.bctengineer.com/q/semester_6/building_technology/window-types-light - Whole chapter: https://www.bctengineer.com/md/semester_6/building_technology/chapter-6 ## Question List types of window. In your opinion which type of window is suitable for admittance of more light inside the room? Discuss. ## Short answer Types include fixed, casement, double-hung, sliding, pivoted, louvered, awning, hopper, bay, bow, dormer, corner, clerestory, skylight. Bay windows admit most light as they project out receiving light from three sides; clerestory and skylights also bring light from roof. Fixed windows with full-height glass maximize light but need separate ventilation. Window area should be at least 1/10 floor area per code. ## Answer #### Types of windows | Window | Description | |---|---| | Fixed window | Glass fixed in frame, gives only light, no ventilation | | Casement window | Shutters hinged at the sides, open like doors; most common | | Double-hung (sash) window | Two sashes slide up and down in a frame with weights | | Sliding window | Shutters slide horizontally on tracks; aluminium/UPVC | | Pivoted window | Shutter turns on a horizontal or vertical pivot at the centre | | Louvered window | Slats (fixed or movable) inclined at 45 degrees; ventilation and privacy | | Awning window | Hinged at top, opens outward at the bottom | | Hopper window | Hinged at bottom, opens inward at the top | | Bay window | Projects outward from the wall in plan; extra space and light | | Bow window | Curved bay | | Dormer window | Vertical window projecting from a sloping roof with its own small roof | | Corner window | Placed at the corner where two walls meet; light and cross ventilation | | Clerestory window | High-level window above eye level; light and ventilation in tall rooms | | Skylight | Glass in the roof slope; top light | #### Window for more light A **bay window** (or a large fixed or corner window) admits the most light because it projects out of the wall and receives light from three sides; the glass area is larger and light comes from different directions. Other good choices are **clerestory windows** and **skylights**, which bring light from the roof. A **fixed window** (picture window) with a full-height glass panel admits maximum light but needs another opening for ventilation. So for admitting more light, a bay window or full-height glazed casement window is suitable. Window area should be at least 1/10 of the floor area as per building code, and the sill is about 0.9 m high. ## Check yourself The answer's key points as multiple-choice questions, with the correct option and why. 1. Which window type admits the most light according to the answer? A. Bay window (or a large fixed/corner window) B. Louvered window C. Pivoted window D. Hopper window Answer: A. A bay window projects from the wall and receives light from three sides with a larger glass area. (Key point: Best window for light) 2. Why does a bay window admit more light than an ordinary flush window? A. It has movable slats at 45 degrees B. It projects out and receives light from three sides C. It is hinged at the top D. It is placed below the floor level Answer: B. Projection from the wall gives more glass area and light from different directions. (Key point: Why bay window) 3. What is the limitation of a full-height fixed (picture) window? A. It admits very little light B. It cannot be fitted with glass C. It gives no ventilation, so another opening is needed D. It must be hinged at the side Answer: C. Fixed glass is sealed in the frame, so it gives light but no ventilation. (Key point: Fixed window limitation) 4. What minimum window area relative to floor area is mentioned in the code? A. 1/2 of the floor area B. 1/20 of the floor area C. 1/3 of the floor area D. 1/10 of the floor area Answer: D. The answer states window area should be at least 1/10 of the floor area. 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