Question 1

Can we have a roof on a building with no slope, i.e., a dead- flat roof? Explain.

Accepted Answer

No. Building codes r

Question 2

Bitumen- treated fiberglass felt

Accepted Answer

A) is more porous than bitumen- treated organic felt. 
B) is less porous than bitumen- treated organic felt. 
C) has the same porosity as bitumen- treated organic felt. 
D) none of the above. 
A) is more porous than bitumen- treated organic felt. 
B) is less porous than bitumen- treated organic felt. 
C) has the same porosity as bitumen- treated organic felt. 
D) none of the above.

Question 3

The insulation in a low- slope roof may consist of board insulation or non- board insulation. Which board insulation is most commonly used and why? Give its R- value per inch thickness.

Accepted Answer

Polyisocyanurate (ISO)board in

Question 4

A cant strip is not required in a base flashing detail with a single- ply roof membrane.

Accepted Answer

A) True 
 B)False

Question 5

Counterflashing is generally

Accepted Answer

A) made of PVC and is a removable item. 
B) made of PVC and is permanently anchored to the deck or parapet wall. 
C) made of sheet metal and is a removable item. 
D) made of sheet metal and is permanently anchored to the deck or parapet wall. 
E) none of the above. 
A) made of PVC and is a removable item. 
B) made of PVC and is permanently anchored to the deck or parapet wall. 
C) made of sheet metal and is a removable item. 
D) made of sheet metal and is permanently anchored to the deck or parapet wall. 
E) none of the above.

Question 6

Which of the following roofing asphalts is commonly used for mopping an SBS- modified bitumen membrane?

Accepted Answer

A) Type I 
B) Type II 
C) Type III 
D) Type IV 
E) SBS- modified asphalt 
A) Type I 
B) Type II 
C) Type III 
D) Type IV 
E) SBS- modified asphalt

Question 7

What is a modified- bitumen roof and built- up roof hybrid? Explain.

Accepted Answer

It consists of hot- mopped built- up roo

Question 8

In terms of fire resistance, low- slope roofs are classified in three types. Name them in order of the highest fire resistance to the lowest fire resistance.

Accepted Answer

(i)Class A roof, (ii

Question 9

A built- up roof (BUR)membrane consists of several plies of felt, where each successive felt is laid over a mopping of asphalt. What does the felt consist of and what is its purpose? What purpose does asphalt serve?

Accepted Answer

Asphalt in a BUR ply is the waterproofin

Question 10

What is a roof cover board and what material is it made of? Explain.

Accepted Answer

A roof cover board is a flat, rigid mate

Question 11

On which of the two types of roofs (low- slope roofs and steep roofs)are the roof coverings more durable and why?

Accepted Answer

Steep roof coverings are more

Question 12

A modified- bitumen sheet may also be torch applied in place of mopping of hot asphalt. Which of the two bitumen sheets-SBS- modified bitumen sheet or APP- modified bitumen sheet-is generally torch- applied?

Accepted Answer

APP- modif

Question 13

In a protected membrane roof, the insulation is

Accepted Answer

A) between the deck and the membrane. 
B) above the membrane and fully adhered to it. 
C) above the membrane but loose laid over it. 
D) below the deck. 
E) not used. 
A) between the deck and the membrane. 
B) above the membrane and fully adhered to it. 
C) above the membrane but loose laid over it. 
D) below the deck. 
E) not used.

Question 14

For a building located in a high- wind region, which of the following roof systems is most suitable?

Accepted Answer

A) Fully adhered single- ply system 
B) Protected membrane system 
C) Loose- laid ballasted single- ply system 
D) Mechanically fastened single- ply system 
E) Gravel- covered built- up roof 
A) Fully adhered single- ply system 
B) Protected membrane system 
C) Loose- laid ballasted single- ply system 
D) Mechanically fastened single- ply system 
E) Gravel- covered built- up roof

Question 15

A built- up roof (BUR)membrane consists of several plies of felt, where each successive felt is laid over a mopping of asphalt. Does the performance of a BUR membrane depend on the number of plies? What is the maximum and minimum number of plies used in a BUR membrane?

Accepted Answer

The greater the number of plie

Question 16

List the five components of a low- slope, membrane roof starting from the top, going down.

Accepted Answer

(i)Roof membrane, (i

Question 17

An SBS- modified bitumen membrane may consist of two plies of SBS- modified bitumen sheets, applied with hot mopping of asphalt. Which type of asphalt is used for mopping the sheets?

Accepted Answer

The answer of An SBS- modified bitumen membrane may consist...

Question 18

Is the fire resistance of a roof a function of the roofing materials (roof cover, roof membrane, cover board, insulation, and deck)only, or may some other factor(s)also affect the fire resistance?

Accepted Answer

Roof slope also affe

Question 19

An SBS- modified bitumen membrane may consist of two plies of SBS- modified bitumen sheets, applied with hot mopping of asphalt. What is the difference between the two sheets?

Accepted Answer

The lower sheet is a smooth- s

Question 20

Name the flashing that is used around a pipe penetrating through a low- slope roof.

Accepted Answer

The answer of Name the flashing that is used around...

Exam 33: Roofing-I Low-Slope Roofs

Can we have a roof on a building with no slope, i.e., a dead- flat roof? Explain.

Bitumen- treated fiberglass felt

The insulation in a low- slope roof may consist of board insulation or non- board insulation. Which board insulation is most commonly used and why? Give its R- value per inch thickness.

A cant strip is not required in a base flashing detail with a single- ply roof membrane.

Counterflashing is generally

Which of the following roofing asphalts is commonly used for mopping an SBS- modified bitumen membrane?

What is a modified- bitumen roof and built- up roof hybrid? Explain.

In terms of fire resistance, low- slope roofs are classified in three types. Name them in order of the highest fire resistance to the lowest fire resistance.

A built- up roof (BUR)membrane consists of several plies of felt, where each successive felt is laid over a mopping of asphalt. What does the felt consist of and what is its purpose? What purpose does asphalt serve?

What is a roof cover board and what material is it made of? Explain.

On which of the two types of roofs (low- slope roofs and steep roofs)are the roof coverings more durable and why?

A modified- bitumen sheet may also be torch applied in place of mopping of hot asphalt. Which of the two bitumen sheets-SBS- modified bitumen sheet or APP- modified bitumen sheet-is generally torch- applied?

In a protected membrane roof, the insulation is

For a building located in a high- wind region, which of the following roof systems is most suitable?

A built- up roof (BUR)membrane consists of several plies of felt, where each successive felt is laid over a mopping of asphalt. Does the performance of a BUR membrane depend on the number of plies? What is the maximum and minimum number of plies used in a BUR membrane?

List the five components of a low- slope, membrane roof starting from the top, going down.

An SBS- modified bitumen membrane may consist of two plies of SBS- modified bitumen sheets, applied with hot mopping of asphalt. Which type of asphalt is used for mopping the sheets?

Is the fire resistance of a roof a function of the roofing materials (roof cover, roof membrane, cover board, insulation, and deck)only, or may some other factor(s)also affect the fire resistance?

An SBS- modified bitumen membrane may consist of two plies of SBS- modified bitumen sheets, applied with hot mopping of asphalt. What is the difference between the two sheets?

Name the flashing that is used around a pipe penetrating through a low- slope roof.

An Overview of the Building Delivery Process How Buildings Come Into Being

Design and Constructions Regulations

Loads on Buildings

Load Resistance the Structural Properties of Materials

Properties of the Envelope-I Thermal Properties

Properties of the Envelope-II Air and Water Vapor Control

Fire and Smoke-Related Properties

Acoustical Properties of Materials

Principles of Joints and Sealants Expansion and Contraction Control

Principles of Sustainable Construction

Soils and Excavations

Below-Grade Construction Foundation Systems and Basements

Materials for Wood Construction-I Lumber

Materials for Wood Construction-Ii Engineered Wood Products, Fasteners, and Connectors

Wood Light-Frame Construction-I

Wood Light-Frame Construction-II

Structural Insulated Panel Construction

Material Steel and Steel Components

Structural Steel Construction

Cold-Formed Steel Construction

Lime, Portland Cement, and Concrete

Concrete Construction-I Formwork, Reinforcement, and Slabs-On-Ground

Concrete Construction-II Site-Cast and Precast Concrete Framing Systems

Masonry Materials-I Mortar and Brick

Masonry Materials-II Concrete Masonry Units, Natural Stone, and Glass Masonry Units

Masonry and Concrete Bearing Wall Construction

Exterior Wall Cladding-I Principles of Rainwater Infiltration Control

Exterior Wall Cladding-II Masonry, Precast Concrete, and Gfrc

Exterior Wall Cladding-III Stucco, Adhered Veneer, Eifs, Natural Stone, and Insulated Metal Panels

Glass, Glazing, and Light-Transmitting Plastics

Windows and Doors

Exterior Wall Cladding-Iv Wall System in Glass

Roofing-I Steep Roofs

Stairs

Floor Coverings

Ceilings

Filters