Saturday, December 12, 2015

Roofing Inspection Section#3 Flat Roofing Quiz#3

You should have finished Study Session 2 before starting this study session. This study session covers modified bitumen roofing. This is the first of a series of single-ply membranes that will be discussed. There is a general description of modified bitumen roofing. Typical conditions that you may encounter in the field are discussed in detail.
The estimated completion time is forty-five minutes.
Objectives
At the end of this study session, you should be able to:
  1. Describe the details of installation of a modified bitumen single-ply membrane.
  2. Explain the techniques for differentiating modified bitumen roofing from roll roofing.
  3. Describe and be able to recognize the possible conditions that you could encounter in the field.
  • Question 1

    Needs Grading
    Ungraded
    For a modified bitumen single ply membrane without a granular surface, what are some clues that can help you to differentiate the surface from other membranes?
    Selected Answer:
    1. It is not plastic or elastomeric
    Correct Answer:
    Correct
    Modified bitumen seams are approximately three feet apart. Seams on other single ply membranes are further apart. There may be bleed out of asphalt at the seams of the modified bitumen roof. Modified bitumen roofing is much thicker than most plastic and synthetic rubber roofing.
    Response Feedback:[None Given]
  • Question 2

    Needs Grading
    Ungraded
    Give one example of ultraviolet protection that is typically used on modified bitumen single ply roofing:
    Selected Answer:
    1. A granular surface
    2. Liquid applied latex coating
    3. Foil surfaces (Aluminum or copper)
    4. Ballasted
    Correct Answer:
    Correct 
    - Granular surfacing - Liquid applied latex coatings - Foil surfaces
    Response Feedback:[None Given]
  • Question 3

    Needs Grading
    Ungraded
    If you are looking at a single ply roof surface that has a granular surface, what are some clues that will help you to differentiate modified bitumen from roll roofing?
    Selected Answer:
    1. Mod bit roofing is 39 inches and roll roofing is 36 inches
    2. Mod bit is more flexible
    3. Roll roofing has nail heads that are exposed.
    Correct Answer:
    Correct
    Roll roofing often has nail heads that are exposed or covered with plastic cement and/or plastic cement along the seams. Roll roofing is typically not used for flashings. Modified bitumen is more flexible than roll roofing and will usually not break if folded. Roll roofing is usually 36 inches wide. Modified bitumen roofing is usually 39 inches (1 meter) wide.
    Response Feedback:[None Given]
  • Question 4

    Needs Grading
    Ungraded
    List 6 common installation mistakes on modified bitumen roofing.
    Selected Answer:
    1. Inadequate overlaps at sides or ends
    2. Seams facing up the slope
    3. Poor surface preparation
    4. Ponding due to lack of slope
    5. End seams not staggered
    Correct Answer:
    Correct
    - Seams facing up the slope - Inadequate overlap of seams - End seams not staggered - Inadequate fastening of the membrane to the decking - Poor sealing at seams and flashings - Inadequate drainage
    Response Feedback:[None Given]
  • Question 5

    Needs Grading
    Ungraded
    List 9 common problems you'll find on modified bitumen roofs. Don't count installation problems.
    Selected Answer:
    1. Old/worn out
    2. Openings at seams and flashings
    3. Surface cracking
    4. Loss of granulars
    5. Slippage of the membrane
    6. Blisters
    7. Punctures or tears
    8. Ponding/vegetation
    9. Patched
    Correct Answer:
    Correct
    - Old - Openings at seams and flashings - Surface cracking - Loss of granules - Slippage - Blisters - Punctures - Ponding - Patching (temporary repairs)
    Response Feedback:[None Given]
  • Question 6

    0 out of 0 points
    Correct
    A roll roofing single-ply membrane is essentially the same as a modified bitumen membrane with a granular surface. The typical life cycle is essentially the same.
    Selected Answer:
    Correct False
    Answers:
    True
    Correct False
    Response Feedback:
    Good work

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