Flat Roofing Materials and Specifications Quiz

What are some materials used for flat roofing to form an impermeable water barrier? (multi choice)

• reinforced bitumen membrane

• mastic asphalt

• single-ply plastic membranes

• liquid coatings

• mineral wool

What is the minimum in-service fall required to prevent ponding on flat roofs?

• 1 in 80

• 1 in 60

• 1 in 100

• 1 in 50

What is the design fall required to allow for differential settlement on flat roofs?

• 1 in 40

• 1 in 30

• 1 in 50

• 1 in 60

How are underlay materials for discontinuous roofing such as slates and tiles characterised?

• By their resistance to water penetration

• By color and texture

• By weight and thickness

• By cost and availability

The BS 476-3:2004 describes a roof system as EXT.F.AA the letters (F, A, A) stands for (multi choice):

• Colour Code of Roof

• Material of roof

• Flat or pitched

• Fire resistance rating

Why must the insulating material in warm roofs be strong?

• To support heavy machinery

• To support any foot traffic associated with maintenance

• To prevent water leakage

• To reduce noise pollution

What does surface condensation on the underside of a roof deck in warm roof construction indicate?

• Excessive thermal insulation

• Insufficient thermal insulation

• Proper ventilation

• Adequate waterproofing

What is required for the waterproof and insulation layers in warm roofs to prevent detachment in strong winds?

• Chemical bonding

• Mechanical fixing or ballasting

• Magnetic strips

• Adhesive tapes

What type of roofs is warm roof construction preferred for? (multi choice)

• Heavyweight roofs

• Lightweight roofs

• flat roofs

• pitched roofs

• Green roofs

What is applied directly onto the roof decking in a cold roof system?

• Thermal insulation

• Weatherproof layer

• Vapour check

• Ceiling