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Home Inspection > ITAZ RQ: Roofing > Flashcards

ITAZ RQ: Roofing Flashcards

1
Q

Roofing:

Is a sloped roof waterproof? Explain.

A
  • Sloped roofs are not water proof.
  • They are designed to shed water like a series of umbrellas.
  • They are not designed to control standing water.
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2
Q

Roofing:

Why can a minor leak be more of a problem than a major one?

A
  • A minor roof leak may cause considerable damage before it is noticed.
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3
Q

Roofing:

Why is there an increased potential for failure on a complex roof?

A
  • More transitions and flashing required resulting in more

opportunities for water penetration.

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4
Q

Roofing:

Which sides of a roof will wear faster in climates where ultraviolet light is the main aging factor?

A
  • South & West
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5
Q

Roofing:

Once a roof is installed, can you see all the important installation details?

A
  • No. May components and details are concealed.
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6
Q

Roofing:

Anything that restricts the drainage of water is a vulnerable area. Give 11 examples.

A
  • Butterfly roofs
  • Wide chimneys near the lower edge of the roof
  • Chimneys in valleys
  • Skylights
  • Drains from upper roofs discharging on to lower roofs
  • Changes in material
  • Equipment that obstructs drainage
  • Complex flashing details
  • Asymmetric valleys
  • Repaired areas
  • Changes in slope
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7
Q

Roofing:
Which of the following roofs is prone to ice dams? a) A steep sloped roof with a wide soffit, b) a low slope roof with a narrow soffit, c) a low slope roof with a wide soffit

A
  • c) a low slope roof with a wide soffit
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8
Q

Roofing:

What are the three possible actions to minimize ice damming?

A
  • Upgrade insulation and ventilation
  • Add eave protection
  • Add electric heating cables
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9
Q

Roofing:

What are the drawbacks to adding a second layer of roofing over a first?

A
  • The dead load is increased
  • Nails may not be long enough to penetrate the roof sheathing
  • Old flashings may not be replaced
  • The roof sheathing cannot be properly inspected
  • Roofing materials may not dry properly
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10
Q

Roofing:

Where can you look on a roof to determine the number of layers?

A
  • Look at the gable ends and lower edges of the roof, at flashings or
  • Lower edges of the roof
  • Flashings
  • Nail pattern protruding through the sheathing from the underside
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11
Q

Roofing:

What is the typical life expectancy of an asphalt shingle roof?

A
  • 12-25 years
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12
Q

Roofing:

What is the maximum recommended number of layers of asphalt shingles?

A
  • 2
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13
Q

Roofing:

One common failure mode for asphalt shingles is cupping. List 5 others.

A
  • Clawing
  • Cracking
  • Blistering
  • Loss of granular material
  • Tearing off
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14
Q

Roofing:

What is the implication of driving nails or staples too deep?

A
  • They may penetrate the sheathing causing potential for water leakage.
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15
Q

Roofing:

Name three poor slate repair methods.

A
  • Face nailing new slates
  • Replacing slates with metal or other roofing materials
  • Covering the damaged area with asphalt
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16
Q

Roofing:

List two ways that clay tile roofs fail.

A
  • Improper installation
  • Tiles cracked or broken
  • Tiles pitted or spalling
  • Tiles Missing
  • Fastener problems
  • Flashing problems
  • Underlying membrane problems
  • Previous repairs
17
Q

Roofing:

You should always walk on clay tile roofs. (True or False)

A
  • False
18
Q

Roofing:

What material might concrete tiles be confused with?

A
  • Clay, slate, wood
19
Q

Roofing:

Concrete tiles are often laid over a waterproof membrane on the roof. (True or False)

A
  • True
20
Q

Roofing:

Should inspectors walk on concrete tile roofs?

A
  • No
21
Q

Roofing:

How are metal roofs attached to the home?

A
  • Nailed, screwed or clipped to plywood sheathing, wood battens or steel battens
22
Q

Roofing:

Another name for roll roofing is…

A
  • Selvage roofing
23
Q

Roofing:

What are two common failure modes for roll roofing?

A
  • Cracking
  • Blistering
  • Buckling
  • Loss of granular material
24
Q

Roofing:

Is it more common for a roof to leak at the flashings or at the other areas in the roof surface.

A
  • Flashings
25
Q

Roofing:

List four common flashing materials

A
  • Felt paper
  • Rubberized asphalt
  • Rubber
  • Metal
  • Roll Roofing
26
Q

Roofing:

List five areas where flashings are found.

A
  • Valleys
  • Chimneys
  • Pipes or stacks
  • Roof/wall instersections
  • Sloped roofs with intersect flat roofs
  • Skylights
  • Eaves
  • Rakes
  • Hips and ridges
27
Q

Roofing:

Are valley flashings a watertight flashing or are they a shedding type of flashing?

A

Shedding

28
Q

Roofing:

Why should open valleys widen at the bottom? (Two reasons)

A
  • To prevent water buildup since the bottom of roofs collect more water
    than the top
  • So they are less likely to collect snow (resulting in ice damming)
29
Q

Roofing:

What are the two types of Closed Valleys?

A
  • Closed cut or half woven

- Fully woven

30
Q

Roofing:

What are the two common materials that are used for open valley flashing?

A
  • Metal

- Roll Roofing

31
Q

Roofing:

Why should you never walk up a valley?

A

You’ll damage the flashing

32
Q

Roofing:

What is the best spot from which to inspect the installation of the valley flashing?

A
  • From the eaves
33
Q

Roofing:

What are the implications of a valley flashing problem?

A
  • Leakage
34
Q

Roofing:

On chimney flashings, is caulking an acceptable substitute to letting the flashing into the mortar joints?

A
  • No.This will be an ongoing maintenance problem.
35
Q

Roofing:

Some ridge flashing systems have a second function, not related to keeping the roof watertight. What is it?

A
  • Ventilation of the roof space
36
Q

Roofing:

There are two types of double glazing systems on skylights. Hermetically sealed and ….

A
  • Ventilated
37
Q

Roofing:
Which type of skylight is most likely to be successful, a skylight mounted on a curb or a skylight mounted directly on the roof?

A
  • Curb
38
Q

Roofing:

Can ice damming be an issue on skylights

A
  • Yes
39
Q

Roofing:

During an inspection of a skylight, you should never lift on the edge of the skylight. (True or False)

A
  • False. You should, carefully.

Home Inspection (22 decks)

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