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day one class > Roofing IL - Day 1 > Flashcards

Roofing IL - Day 1 Flashcards

1
Q

What provides the weatherproofing in a built up roof system?

A

Bitmen

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2
Q

A roof with a slope of 5/12 is considered?

A

Steep Slope

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3
Q

A rafter that extends diagonally from an outside corner of a building to the ridge board is called?

A

Hip rafter

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4
Q

The temperature in which heated bitumen is at proper viscosity is?

A

560*

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5
Q

The projecting edge of a roof extending beyond the supporting wall is called?

A

Eave

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6
Q

What provides the waterproofing and reinforcement in single-ply membrane?

A

Polymers

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7
Q

What can lead to the splitting, buckling and ridging of roof membranes?

A

Poor installation

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8
Q

Bitmen is also known as?

A

Tar

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9
Q

Built-up roof systems are?

A

Resistant to wind up-lift

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10
Q

What should be installed on the same plane and line as the building’s structural expansion?

A

Roof expansion joint

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11
Q

In asphalt shingle construction, the natural-colored mineral granules are primarily added for?

A

Providing ultra-violet & weathering protection

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12
Q

How many nails in a high wind areas may be required per shingle?

A

6

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13
Q

How many types of valley construction is in asphalt shingle?

A

3

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14
Q

What is the absorption rates of clay tile?

A

2-10

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15
Q

How much can 100 to 700 slate pieces weigh?

A

2 ton

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16
Q

Preferred number of nails to fasten a roof slate is?

A

2

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17
Q

Preferred material for nail in slate is?

A

Copper

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18
Q

Bitumen becomes what with heat?

A

Fluid

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19
Q

A square measures?

A

10 foot by 10 foot

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20
Q

The recommended spacing for plywood sheathing at the butt end is?

A

1/8

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21
Q

The recommended thickness for OSB with a rafter spacing of 16” is?

A

15/32

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22
Q

The dead load of a roof is the weight of the roof deck, shingles and?

A

Underlayment

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23
Q

Underlayment in roofs of 4:12 or more, the upper courses of felt should overlap the lower courses by at least how many inches?

A

2”

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24
Q

Which type of single-ply membrane which are field applied using only one layer of membrane material is vulcanized during manufacturing ?

A

Thermoset

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25
Q

A single-ply roof membrane has two basic principal components.

A

Water proof + reinforcement

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26
Q

Name the three primary parts of a membrane roof system?

A

Insulation, roof membrane, surfesing

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27
Q

A roof with a slope of 4: 12 (chart 1.054) has a run of 24 feet. what is the length of the rafter?

A

25.30 (24 x 1.054)

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28
Q

Convert 7 inches into decimals

A

.58 (7 divided by 12)

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29
Q

True or false:
Underlayment adds to the fire rating of the roof system?

A

True

30
Q

What are the non-stationary loads a roof deck must carry?

A

Mobile installation equipment and labor

31
Q

Composition for structural lightweight concrete?

A

Cement, water, shale, clay or slate aggregates

32
Q

Which is the weatherproofing component in BUR membranes?

A

Bitumen or cold-applied adhesives

33
Q

What is the best way to install BUR membranes?

A

Sandwiched between layers of hot bitumen or cold-applied adhesives

34
Q

Which adds the most fire resistance in low slope membranes?

A

Aggregates, pea gravel or similar materials (rocks don’t burn)

35
Q

Whats recommended when heating bitumen during installation?

A

Circulate bitumen while heating

36
Q

Whats the best way to lay BUR plies?

A

Lay in a single, complete membrane, all on the same day

37
Q

Whats the most accurate regarding the best roofing system?

A

A roof matched closely to building specifications and requirements

38
Q

Which is not the purpose of a roof deck?

A

Waterproofing

39
Q

What is the minimum recommendation for replacement of expansion joints in a roof final assembly?

A

Same plane or line as a buildings structural expansion joints

40
Q

Whats the main purpose of expansion joints in low-slope system?

A

To minimize the effects of stresses and movements

41
Q

What provides the reinforcement in non-reinforced thermoset or thermoplastic membranes?

A

Polymers making up thermoset or thermoplastics

42
Q

How high can EVT rise for heated bitumen?

A

560 degrees

43
Q

What is the movement of water vapor?

A

Vapor drive moves from inside to outside in cooling weather

44
Q

In vaulted ceilings , which would most likely lead to rapid deterioration of a roof?

A

Insulated, not vented decks

45
Q

Why does the NRCA not recommend OSB?

A

OSB retains more moisture which can dislodge fasteners

46
Q

What size water and ice dam protection should be used on a roof with a slope less than 4:12?

A

Minimum of 36 from the inside the exterior wall

47
Q

What type of valley would need to be enlarged when ice and snow are present?

A

Open valleys

48
Q

Which would be the most appropriate when installing downslope side chimney flashing?

A

Apron flashing

49
Q

How should crickets in the upslope side of a chimney be constructed?

A

Wood framing

50
Q

What does the NRCA recommend when installing drip edge , or eave edge metal flashing?

A

Extend underlayment over the flange

51
Q

What can be used in place of a water and ice dam protection in a tile roofing system?

A

Two-ply underlayment with interply of asphalt roof cement adhesive.

52
Q

Proper low-slope drainage with dry weather.

A

48 hours following moisture related weather

53
Q

Which would least likely result from poor drainage?

A

Immediate changes to slope and structural integrity of the roof deck.

54
Q

Why are pitch-pockets not recommended?

A

They need frequent repair

55
Q

Whats the purpose of eave closures in a tile roof?

A

To prevent birds, insects etc from entering the ends of the first tile course.

56
Q

Which is the most common pattern in a wood roof?

A

Straight line

57
Q

Which is the purpose of a batten system in a tile roof?

A

To straighten the bond between the tiles and roof

58
Q

What does the NrCA recommend when installing an asphalt shingle roof?

A

Minimum of 6 nails per shingle in high wind areas

59
Q

What slope does the NRCA recommend slate roofing have a waterproof membrane under slate?

A

All slopes

60
Q

What fasteners should be used to attach slate to roof decks?

A

Copper nails

61
Q

Which would not likely create interior damage?

A

Built-in gutter at eave

62
Q

What is used for moisture control in low-slope roofs?

A

Vapor retarders

63
Q

Moisture in the air, takes form of?

A

Vapor

64
Q

Vapor drive can be characterized by the phrase:

A

Warm chasing cold

65
Q

Reduces the flow of water vapor and prevents warm humid air from contracting a cold surface and is called a?

A

Vapor retarder

66
Q

How many mopping of hot asphalt over two plies of fiberglass ply felt are required to give a perm rating of 0?

A

2-3

67
Q

The recommended spacing for hangers for gutters is?

A

3’

68
Q

the recomended distance the ice and water shield should run upslope a roof with a slope LESS THAN 4:12 in a heavy snowfall area is?

A

36”

69
Q

What do you call a second roof built on top of the primary roof to increase the slope of a roof or valley or chimney or penetration wider than 24”?

A

Cricket

70
Q
A

day one class (1 decks)

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