Roofing Inspection Section#2 Steep Roof Flashings Quiz#2

You should have finished Study Session 1 before starting this study session. This study session contains information specific to valley flashings.

The estimated completion time is thirty minutes.

Objectives
At the end of this study session, you should be able to:

• Describe open and closed valley flashing details.
• Explain why valley slopes are low.
• Identify the common valley flashing materials.

• Question 1

  Needs Grading

  	On which type are shingles cut back two inches from the centerline of the valley?
  	Selected Answer: Half-woven valley Correct Answer:   Closed cut valley Response Feedback: [None Given]

• Question 2

  Needs Grading

  	Pieces of metal flashing longer than 10 feet can be a problem. Why?
  	Selected Answer: This is because the expansion and contraction, caused by changes in temperature, may cause buckling.  Correct Answer:   Long sections of metal are prone to buckling. Response Feedback: [None Given]

• Question 3

  Needs Grading

  	What are the two common materials that are used for open valley flashing?
  	Selected Answer: 1. Asphalt shingles flashing 2. Metal flashing Correct Answer:   - Roll roofing - Metal Response Feedback: [None Given]

• Question 4

  Needs Grading

  	What are the two types of closed valleys?
  	Selected Answer: 1. Half-woven valley 2. Full-woven valley Correct Answer:   Closed cut or half woven valley, and fully woven valley Response Feedback: [None Given]

• Question 5

  Needs Grading

  	What is the purpose of "cutting the points"?
  	Selected Answer: Cutting the points ia a good practise as it discharges water that is flowing down the valley from running along the top of the shingle tab.  Correct Answer:   This helps prevent water running along the top edges of shingles from the sides of the valley into the roofing system. Response Feedback: [None Given]

• Question 6

  Needs Grading

  	What is the purpose of an "upstand" that can sometimes be found in the center of a metal valley flashing?
  	Selected Answer: Helps prevent water drving down from one side of the roof, under the shingles on the other side of the valley.  Correct Answer: Upstands (splash diverters) prevent water driving down from one side of the roof from running up under the shingles on the other side of the valley. Response Feedback: [None Given]

• Question 7

  Needs Grading

  	Why is a valley flashing a vulnerable area? (3 reasons)
  	Selected Answer: 1. The valley has to carry a large amount of water 2. Snow and ice accumulated in valleys causing ice dams 3. Valley flashings are long sections of materials, subject to stretching and buckling forces Correct Answer: - Valleys have to carry a large volume of water - Snow and ice accumulate in valleys - Valley flashings are subject to stretching and buckling - Valleys have a lower slope than the adjacent roof surfaces. Response Feedback: [None Given]

• Question 8

  Needs Grading

  	Why should open valleys widen at the bottom? (two reasons)
  	Selected Answer: 1. Lower sections of the roof see more water than upper sections. Lower sections of valeys also see more water than upper sections.  2. Valleys that widen as they desend are less likely to hang up snow and ice. Valleys of uniform width are more prone to ice damming.  Correct Answer: The lower sections of the valley see more water than the upper sections and valleys that widen as they descend are less likely to collect snow and ice. Response Feedback: [None Given]

• Question 9

  0 out of 0 points

  	Are valley flashings a water tight flashing or are they a shedding type of flashing?
  	Selected Answer:   shedding type flashing Answers: water tight flashing   shedding type flashing Response Feedback: Good work

• Question 10

  0 out of 0 points

  	The slope of a valley is:
  	Selected Answer:   less steep than the slope of the roof Answers: the same as the slope of the roof steeper than the slope of the roof   less steep than the slope of the roof Response Feedback: Good work