About Lesson
Classification of roof
A. According to the shape it can be classified into 2 types:
- Flat roof: eg. RCC roof
- Slope roof: Eg. Tile roof
B. According to materials used for roofing, it can be classified as:
a. Thatch roof:
- Mostly used in village.
- Cheap and locally available.
- Has some disadvantages as fire catching, short life, easily damage.
b. CGI sheet (Corrugated galvanized iron sheet) :
- Mostly used in Nepal.
- Convenient to transport.
- Light in weight.
- Safety against water leakage, wind, fire, hailstorm.
Disadvantages:
- Heat, noise i.e low thermal and sound insulation.
- Dew collection in roof in morning in winter.
- Sound disturb in hailstorm and rain.
c. Tile:
- Tiles are indigenous in used and its types are:
- Flat tiles
- Pot tiles
d. RCC:
- Used in non load bearing buildings.
- Durable and long life span.