TREC 70.txt

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spunki1
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243365
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TREC 70.txt
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2013-10-28 12:40:38
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  1. What are the two main categories of roofing systems
    • sloped roofs
    • flat roofs
  2. Flat roofs should be perfectly flat - T or F
    F
  3. The pitch of a roof is defined as a rato of ___ over ___
    • rise
    • run
  4. Roofs with a pitch less than 4 in 12 are considered ___-___ roof systems
    low-sloping
  5. Two major factors that affect the cost of a re-roofing job are ___ and ___
    • pitch
    • number of squares
  6. What is the purpose of the strip of tar put on asphalt shingles by the manufacturer
    it is a self-sealing tar; the shingle over it seals to it to prevent it from being blown off
  7. What type of shingles should be used for roof pitches between 2/12 and 4/12
    low slope shingles; only 1/3 is exposed
  8. The steeper the pitch of the roof, the faster the shingles will wear out - T or F
    F
  9. What happens to asphalt shingles as they lose their granular covering
    they dry out and become brittle; they crack, buckle and curl
  10. What is the difference between wood shingles and wood shakes
    • wood shingles: machine cut; thinner; most are cedar but some are redwood; can use on low as 4/12 but 6/12 is better; vary in length (16"-24"); 1/3 or less is exposed; 30-40 years life expectancy
    • wood shakes: thicker; much more uneven surface
  11. Typically, no more than ___ of a wood shingle should be exposed to the weather
    1/3
  12. The life expectancy of wood shingles is generally ___ to ___ years
    • 30
    • 40
  13. The life expectancy of high quality slate roofs is ___ to ___ years
    • 60
    • 100
  14. What is the biggest problem with slate roofs
    nails rust and slates slide out of position
  15. Flashings generally outlast the slates - T or F
    F
  16. An asphalt shingle roof can almost always be replaced with a concrete tile roof with no modifications - T or F
    F
  17. The life expectancy of asbestos cement shingles is generally ___ to ___ years
    • 30
    • 50
  18. List some of the most common types of metal roofs
    • copper
    • galvanized steel
    • pre-painted or coated steel
    • terne
    • tin
  19. Covering a metal roof with tar is the best method of repair - T of F
    F
  20. Where is corrugated plastic generally used as a roofing material
    over patios and light structures
  21. A covering of ___ should be applied on a built-up roof to reflect ___-___ ___ and protect the roof from ___ ___
    • gravel
    • ultra-violet rays
    • mechanical damage
  22. The maximum pitch for a built-up roof is ___ in 12
    3
  23. Four-ply built-up roofs typically last ___ to ___ years
    • 15
    • 20
  24. What is the result of moisture being trapped underneath or within the membrane layers of a built-up roof
    blisters and bubbles will form
  25. What is the possible result of water ponding on a flat roof
    a shortened life expectancy of up to 50%
  26. Because of the construction of built-up roofs, water can travel a significant distance through the plies of a roof and create a water stain on a ceiling some distance away from the actual leak - T or F
    T
  27. Selvage roofing typically comes in rolls ___ or ___ inches wide
    • 18
    • 36
  28. The life expectancy of roll roofing is typically ___ to ___ years
    • 5
    • 10
  29. How is roll roofing attached to the roof
    • sometimes cemented
    • nailed at edges
  30. List three types of single-ply membranes
    • modified bitumen
    • PVC (plastic)
    • rubber shingles
  31. The majority of problems that have been identified with the single-ply membranes have been with

    A. the flashings
    B. the low quality of the product
    C. mechanical damage
    D. the installation
    D. the installation
    (this multiple choice question has been scrambled)
  32. Modified bitumen roof membranes should be protected from ___-___ ___ using either ___, ___ or ___
    • ulta-violet rays
    • granules
    • foil
    • paint
  33. Any roof system that absorbs water should be installed to permit quick ___
    drying
  34. What is the maximum number of layers of asphalt singles that should be installed on a roof
    two
  35. Why is it preferable not to install wood shingles over asphalt shingles
    doing so does not allow shingles to breathe; therefore, they cannot dry out
  36. List the types of roofing over which slate roofs should be installed
    none
  37. Existing built-up roofing systems are always stripped before a new roof is installed - T or F
    F - should be but aren't always
  38. Why should most plastic and synthetic rubber roof membranes not be installed over built-up roofs
    they are not compatible with asphalt
  39. List four areas where a roof is unusually vulnerable to leakage
    • roof changing direction
    • change in roofing material
    • two or more flashings intersect
    • antennas; low slope; repaired areas
    • (also penetrations)
  40. How does ice damming occur
    snow and ice collect in a certain area (usually the eave); water cannot run down (off) so it backs up into and through the roofing system
  41. Ice dams are most common on low sloped roofs - T or F
    F
  42. List four solutions to ice damming problems
    • increase attic insulation
    • increase attic ventilation
    • at roof install protection 2 1/2' higher than the support wall
    • install heating cables
  43. A tree with its branches touching the roof will protect the roof from wear - T or F
    F
  44. Where are flashings used (list 3)
    • where dissimilar materials meet
    • where a material changes directions
    • at joints in materials
  45. List the two materials commonly used for flashings
    • metal
    • roll roofing
  46. What is the difference between an open valley and a closed valley flashing
    • closed: valley flashing is covered with shingles; interwoven or closed cut
    • open: has visible valley flashing
  47. How many layers of roll roofing should be used in a valley flashing
    2
  48. The best material to use for valley flashing is ___
    metal
  49. What material is used for hip and ridge flashings on an asphalt shingle roof
    shingles
  50. Where a flat roof meets a sloped roof, the flat roof membrane should extend at least ___ feet up the sloped roof
    3
  51. What are two types of roof to wall flashings required when a roof slope is parallel to a wall
    • counter flashing
    • step flashing
  52. What precautions should be taken when installing the high side portion of a chimney flashing
    install flashing 6" up the chimney or 1/6 the width of the chimney
  53. A chimney installed in the peak of a roof is more likely to leak than a chimney installed through the bottom of a valley - T or F
    F
  54. What should be installed over the top of a parapet wall
    typical wall/roof flashing, but will depend on whether roof is sloped or flat; also a cap flashing should be used over the top to prevent water penetration into the wall system
  55. What types of material are typically used for flashings around plumbing stacks on sloped roofs
    metal or rubber
  56. What is a pitch pan
    a sheet metal pan filled with pitch or tar 1" to 2" high around the stack
  57. On a dormer, how far above the roof surface should wood siding materials be
    2"
  58. A skylight should sit on a curb that protrudes at least ___ inches above the roof surface
    • Home Reference Book: ideally 6" for snow but the diagram shows 4"
    • 2006 IRC: 4" (I believe this will be the answer if it is on our test)
  59. Condensation problems in solariums are usually a result of poor flashings - T or F
    T
  60. What is the purpose of a gravel stop
    • securing and protecting roof membrane at roof edge
    • preventing gravel from sliding off built-up roof
    • forming a drip edge to protect facia
  61. Chimneys are commonly constructed of ___ or ___
    • masonry
    • steel
  62. What is a chimney flue? A ___ and ___ channel for smoke.
    • separate
    • distinct
  63. A first floor fireplace may share a flue with a gas furnace - T or F
    F? (there does not seem to be a clear cut answer in the book)
  64. List three common materials used to line chimney flues
    • clay tile
    • metal
    • asbestos cement pipe
  65. What is the most common element that results in chimney deterioration
    water
  66. What would a ring of accelerated deterioration around the exterior of a masonry chimney indicate to you
    there is a gap in the interior clay tile lining
  67. What is the difference between a chimney cap and a rain cap
    • chimney cap: keeps rain out of masonry chimney
    • rain cap: keeps rain out of flue
  68. Any chimney wider than 36" should be braced - T or F
    F? (Home Reference Book does not give an actual width; 5th Edition Code Check book says if >40 inches wide)
  69. Chimneys should be a minimum of ___ feet above the point of penetration through the roof and ___ feet higher than anything within ___ feet of them
    • 3
    • 2
    • 10
  70. What problem may occur with a chimney that does not meet the above rule
    downdraft

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