The roof is the topmost part of the building whose main function is to enclose the space and protect it from the effects of weather elements. A good roof is as important as a secure foundation. Just as a well-designed foundation protects a building from destruction from below, a good roof protects the building itself and its contents and prevents destruction from above.
A roof should satisfy the following requirements:
- Strength and Stability: The roof structure should be strong and stable enough to take up the anticipated loads safely.
- Weather Resistance: The roof covering should have adequate resistance to resist the effects of weather elements.
- Heat Insulation: The roof should provide adequate insulation against heat.
- Sound Insulation: The roof should have adequate insulation against sound from external sources.
- Fire Resistance: The roof should offer an adequate degree of fire resistance in order to give protection against the spread of fire from any adjacent buildings and to prevent early collapse of the roof. The form of construction should also be such that the spread of fire from its source to other parts of the building by way of roof cannot occur.
- Day Lighting: The roof provides daylight in buildings with large floor area.
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