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Techniques Exam 3 Roofing Questions and Answers

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Techniques Exam 3 Roofing Questions and Answers

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Techniques Exam 3 Roofing
Questions and Answers
_____ % of all lawsuits against architects originate in roofing problems - -65

- How many years till a roof needs to be replaced? - -12-14 years

- What can cause roofs to wear down? - -physical and chemical degradation,
solar radiation, rainwater, and windstorm

- Low Slope Roof - -water resisting roof and consists of continuous roof
membrane over a relatively flat roof surface

- Steep Roof - -water shedding roof consists of small shingles that overlap
eachother

- Components of Low Slope Roof - -1) Roof Membrane including a protective
cover or coating above the membrane
2) Insulation
3) Roof Deck
4) Flashings
5) May require vapor retarder in cold or high humidity regions

- 3 Categories of Roof Membrane - -1) Built Up Roof
2) Modified Bitumen Roof Membrane
3) Single Ply Roof

- Built Up Roof Membrane - -Consists of 3-5 plies of felts with intervening
moppings of bitumen (asphalt or coal tar)

- Modified Bitumen Roof Membrane - -Similar to built up roof membrane and
comprises 2-3 plies of modified bitumen sheets with intervening moppings of
bitumen

- Single Ply Roof Membrane - -Consists of only one sheet of a synthetic
polymer and does not require protective cover

- What is the last ply covered with? - -Surfacing material (rock)

- What kind of strength does the felt provide? - -Tensile

- Is fiberglass felt porous? - -Yes

- 2 types of bitumen - -asphalt and coal tar

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