Question 1

Describe the attachment method of various components (insulation, cover board and membrane)of a fully mopped single- ply roof (SPR)membrane on a steel deck.

Accepted Answer

Insulation boards are fastened to the de

Question 2

A built- up roof membrane is fully adhered to the substrate (typically the cover board)using hot asphalt as adhesive. Modified- bitumen membrane is also fully adhered-either through hot mopping or torch application. How is a single- ply roof (SPR)membrane adhered?

Accepted Answer

An SPR membrane can be fully adhered wit

Question 3

Insulating concrete and foamed concrete are two types of insulating concrete that can be used as insulation on a steel roof deck. What is the difference between insulating concrete and foamed concrete?

Accepted Answer

Insulating concrete consists of expanded

Question 4

The flashing around a roof drain is

Accepted Answer

A) curb flashing. 
B) flange flashing. 
C) base flashing 
D) none of the above. 
A) curb flashing. 
B) flange flashing. 
C) base flashing 
D) none of the above.

Question 5

The roof membranes on a low- slope roof consist of one the following: built- up roof membrane,
modified- bitumen roof membrane, or single- ply roof membrane. Which of these membranes are hot- mopped or heat- applied?

Accepted Answer

Built- up roof membr

Question 6

What is the primary reason for the use of low- slope roofs on commercial buildings in place of steep roofs?

Accepted Answer

Typically, low- slope roofs ar

Question 7

Insulating concrete and foamed concrete are two types of insulating concrete that can be used as insulation on a steel roof deck. Is the steel deck used under such concrete required to be a special type of steel deck and why?

Accepted Answer

The steel deck used with insulating conc

Question 8

The lap seams in a PVC roof membrane are typically sealed by

Accepted Answer

A) heat welding. 
B) liquid adhesives. 
C) single- sided tape. 
D) double- sided tape. 
E) any one of the above. 
A) heat welding. 
B) liquid adhesives. 
C) single- sided tape. 
D) double- sided tape. 
E) any one of the above.

Question 9

The flashing around a pipe penetrating through the roof is

Accepted Answer

A) flange flashing. 
B) base flashing 
C) curb flashing. 
D) none of the above. 
A) flange flashing. 
B) base flashing 
C) curb flashing. 
D) none of the above.

Question 10

FM MH represents

Accepted Answer

A) the fire rating of a roof assembly. 
B) the wind- uplift resistance of roof assembly. 
C) the hail- impact resistance of roof assembly. 
D) none of the above. 
A) the fire rating of a roof assembly. 
B) the wind- uplift resistance of roof assembly. 
C) the hail- impact resistance of roof assembly. 
D) none of the above.

Question 11

Lap splices in thermoplastic single- ply roof membranes (PVC and TPO)are heat sealed. Is the equipment used for heat sealing an open flame, like the one used for APP modified bitumen sheets? Explain.

Accepted Answer

No, it is hot air pr

Question 12

Which of the following represents an asphalt- treated fiberglass felt?

Accepted Answer

A) Type II 
B) Type III 
C) Type IV 
D) No. 15 
E) No. 30 
A) Type II 
B) Type III 
C) Type IV 
D) No. 15 
E) No. 30

Question 13

Explain what counterflashing is.

Accepted Answer

Counterflashing laps

Question 14

Which of the two types of roofs (low- slope roofs and steep roofs), has a greater market share?

Accepted Answer

Low- slope roofs hav

Question 15

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

Accepted Answer

1. Class S

Question 16

A built- up roof (BUR)membrane consists of several plies of felt, where each successive felt is laid over a mopping of asphalt. The felt consists of glass fibers, woven into a mat, which is porous. Although the BUR membrane is meant to waterproof the roof, the porosity of felts is considered an advantage. Why?

Accepted Answer

The temperature of asphalt when applied

Question 17

What are the functions of a roof cover board? Explain.

Accepted Answer

Roof cover boards serve several importan

Question 18

Which of the following built- up roof membranes is more commonly used?

Accepted Answer

A) Asphalt built- up roof membrane 
B) Tar built- up roof membrane 
A) Asphalt built- up roof membrane 
B) Tar built- up roof membrane

Question 19

A built- up roof (BUR)membrane consists of several plies of felt, where each successive felt is laid over a mopping of asphalt. The last ply in a BUR is not the same as the underlying plies. What is the difference and why?

Accepted Answer

The last ply in a BUR consists of one of

Question 20

A low- slope roof is defined as a roof whose slope is less than

Accepted Answer

A) 1:12. 
B) 1.5:12. 
C) 2:12. 
D) 3:12. 
E) 2.5:12. 
A) 1:12. 
B) 1.5:12. 
C) 2:12. 
D) 3:12. 
E) 2.5:12.

Exam 33: Roofing-I Low-Slope Roofs

Describe the attachment method of various components (insulation, cover board and membrane)of a fully mopped single- ply roof (SPR)membrane on a steel deck.

A built- up roof membrane is fully adhered to the substrate (typically the cover board)using hot asphalt as adhesive. Modified- bitumen membrane is also fully adhered-either through hot mopping or torch application. How is a single- ply roof (SPR)membrane adhered?

Insulating concrete and foamed concrete are two types of insulating concrete that can be used as insulation on a steel roof deck. What is the difference between insulating concrete and foamed concrete?

The flashing around a roof drain is

The roof membranes on a low- slope roof consist of one the following: built- up roof membrane, modified- bitumen roof membrane, or single- ply roof membrane. Which of these membranes are hot- mopped or heat- applied?

What is the primary reason for the use of low- slope roofs on commercial buildings in place of steep roofs?

Insulating concrete and foamed concrete are two types of insulating concrete that can be used as insulation on a steel roof deck. Is the steel deck used under such concrete required to be a special type of steel deck and why?

The lap seams in a PVC roof membrane are typically sealed by

The flashing around a pipe penetrating through the roof is

FM MH represents

Lap splices in thermoplastic single- ply roof membranes (PVC and TPO)are heat sealed. Is the equipment used for heat sealing an open flame, like the one used for APP modified bitumen sheets? Explain.

Which of the following represents an asphalt- treated fiberglass felt?

Explain what counterflashing is.

Which of the two types of roofs (low- slope roofs and steep roofs), has a greater market share?

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

What are the functions of a roof cover board? Explain.

Which of the following built- up roof membranes is more commonly used?

A built- up roof (BUR)membrane consists of several plies of felt, where each successive felt is laid over a mopping of asphalt. The last ply in a BUR is not the same as the underlying plies. What is the difference and why?

A low- slope roof is defined as a roof whose slope is less than

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