Roofing

UNIT – III

Chapter - 16 (C)

ROOFING

ROOFS

Roof is a horizontal or sloping structural member provided as a cover to a building. intermediate floors are covered by horizontal R.C.C. slabs.

1. REQUIREMENTS OF A GOOD ROOF

1. Protective Covering: A roof should give a cover to the building by protecting it from ill effects of natural agencies like sun shine, rain, wind, dust and snow. 2.

2. Durability: Roof should be made of durable materials to withstand the adverse effects of sun, wind, rain, dust and snow.

3. Draining the Rain Water: Roof should have adequate slope to drain-off the rain water in the simplest and direct manners.

4. Structural Stability: Roof should be structurally stable. It should be strong enough to carry the loads coming on it.

5. Water-Proof: Roof should prevent dampness under the roof. It should be water-proof.

6. Insulation from Heat and Sound: Roof should provide insulation from heat and sound.

7. Appearance: Roof should have an aesthetically pleasing and architectural appearance.

8. Fire-Resistant: Roof should be fire-resistant.

9. Strength of Roof Covering: Roof covering should be strong enough to withstand its own weight and of workmen who may occasionally climb up for maintenance.

2. TYPES OF ROOFS

The roofs are classified according to shape, span and structural design principles as follows:

* Flat Roofs or Terrace Roofs

* Sloping or Pitched Roofs

* Curved Roofs