Roofs

Question 1

Factors to Consider When Designing a Roof

Answer 1

• Design
• Durability
• Reflectivity & Emissivity (Ability To Reflect Heat And Dissipate Absorbed Heat)
• Availability And Cost Of Roofing Material
• Climatic Conditions

Question 2

Types of Roofs and Designs. explain briefly each with a picture.

Answer 2

1. Gable Roofs
2. Shed Roofs
3. Flat roof
4. Hip Roof (Hipped roof)
5. Saltbox Roofs
6. Arched Roofs

Question 3

Roof Members (parts of roof)

Answer 3

1. Ridge
2. Common Rafters
3. Valley Rafters
4. Wall Plates
5. Ceiling

Question 4

03 main Types of the loads of roofs

Answer 4

• Load of the roof
• Wind load
• Impact load

Question 5

Types of roof covering commonly used?

Answer 5

• Clay tiles
• asbestos cement roofing sheets
• Galvanized iron sheets
• Glass covering
• Thatch covering ( straw etc..)
• Solarroof

Question 6

3 main Functions of a roof? briefly explain them

Answer 6

• Insulation
• Ventilation
• Drainage

Question 7

what cause Ridge Sag?

Answer 7

absence of collar beams to the rafters

Question 8

Environment Advantages of green roof?

Answer 8

• Reduce global warming
• Reduce carbon dioxide concentration
• Filter pollutants and heavy metals out of rainwater
• Reduce dust and smog levels
• Good use of recycled materials
• Absorb noise and sound
• Provide natural homeland for plants and animals

Question 9

Personal Advantage of green roof

Answer 9

• Reduce energy cost
• Fire retardation
• Help to insulate the building for
  sound
• High real-estate value
• Increased lifetime of roof
• Increased thermal insulation

Question 10

Public Advantage of green roof

Answer 10

• Improve aesthetic
• Improved air quality
• Storm water Retention
• Moderation of Urban Heat Island Effect
• Reduce noise
• Reduction of Electromagnetic
  Radiation
• Create local job

Question 11

Design specific advantage

Answer 11

• Increased bio-diversity
• Improved health and well-being
• Opportunities for urban
  agriculture
• Educational opportunities

Question 12

General Disadvantages of green roofs?

Answer 12

• Higher initial cost
• Higher maintenance costs
• Restrictions involving climate and weather
• Complex drainage systems
• Stronger roof beams in order to support
• More costly repairs and fixings