---
title: "Casement, louvered and corner windows"
subject: "Building Technology"
chapter: 6
key: "semester_6/building_technology:casement-louvered-corner"
source: https://www.bctengineer.com/q/semester_6/building_technology/casement-louvered-corner
site: BCT Engineering
---

# Casement, louvered and corner windows

Building Technology · Chapter 6: Doors and windows

- Asked in: 2080 Chaitra, 6 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/casement-louvered-corner
- Whole chapter: https://www.bctengineer.com/md/semester_6/building_technology/chapter-6

## Question

Explain casement, louvered and corner window. Where is this type of window used?

## Short answer

Casement windows have side-hinged shutters opening like doors for full ventilation; used in residences, offices, public buildings. Louvered windows have 45-degree slats allowing air but blocking rain and view; used in bathrooms, toilets, kitchens for privacy with ventilation. Corner windows at room corners with two casements meeting without a post provide light and cross ventilation from two sides; used in living rooms, bedrooms with views.

## Answer

#### Casement window
Shutters are hinged to the vertical frame side and open like a door, outward or inward. Full area can be opened, so ventilation is good. **Used** in residential rooms, offices and public buildings; common in Nepal.

#### Louvered window
Slats (louvres) of wood, glass or metal fixed or movable at 45 degrees in the frame. They allow air but block rain, sun and view. **Used** in bathrooms, toilets, kitchens, stores and where privacy with ventilation is needed.

#### Corner window
Placed at the corner of a room where two walls meet, with two casement windows meeting without a corner post. It admits light and air from two sides and gives cross ventilation and a wide view. **Used** in living rooms, bedrooms and sitting rooms of houses, where a good view is available.

```text
 PLAN of corner window
 wall |_______________
      |   window A    |
 wall |__             |
         | window B   |
```

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. What does a corner window provide?
   A. Light from one side only
   B. Light and air from two sides with cross ventilation and a wide view
   C. Only ventilation, no light
   D. Privacy in bathrooms
   Answer: B. Two casements meet at the corner without a post, giving light, air and cross ventilation from two sides. (Key point: Corner window)

2. Where are louvered windows used?
   A. Living rooms for view
   B. Attics only
   C. Bathrooms, toilets, kitchens and stores needing privacy with ventilation
   D. Shop fronts
   Answer: C. Louvres allow air but block rain, sun and view, so they suit privacy-with-ventilation places. (Key point: Louvered window use)

3. Why is ventilation good in a casement window?
   A. The full area can be opened
   B. It has no frame
   C. Only half the area opens
   D. It is fixed
   Answer: A. Shutters open like a door so the whole opening area is available. (Key point: Casement advantage)

## Related in Building Technology

- [Door/window parts; casement, awning, hopper](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Adoor-window-parts-casement) — Building Technology, chapter 6
- [Short note: Louvered window components](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Alouvered-window-components) — Building Technology, chapter 6
- [General parts of doors and windows](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Adoor-window-parts) — Building Technology, chapter 6, asked 2×
- [Purpose and sizing of doors and windows; panelled doors](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Adoor-window-purpose-sizing) — Building Technology, chapter 6
- [Bay and dormer windows](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Abay-dormer-window) — Building Technology, chapter 6
- [Door/window components and door types](https://www.bctengineer.com/question.md?key=semester_6%2Fbuilding_technology%3Adoor-window-components-types) — Building Technology, chapter 6

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- [Rectangular window in FIR design; Gibbs oscillations](https://www.bctengineer.com/question.md?key=semester_7%2Fdigital_signal_analysis_and_processing%3Arectangular-window-gibbs) — Digital Signal Analysis and Processing, chapter 5, asked 2×
- [EVA; 100 precast windows in 20 days](https://www.bctengineer.com/question.md?key=semester_7%2Fproject_engineering%3Aeva-precast-windows-c70) — Project Engineering, chapter 4
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