The number of lawsuits involving ________ equals or exceeds the total number of lawsuits over all other building systems combined
low-slope roof systems
What is it called when flat asphaltic roofs begin to crack and dry out in random patterns (hint: skin)
Alligatoring
In regards to roofing systems, XPS can be an issue for what reason?
difficult to adhere to (sandwiched between deck and membrane)
Vapor Retarder is used in a roof system for what purpose?
Insulation often entraps water. The vapor retarder is designed to intercept the flow of water vapor into the insulation
Dead-Level Roof
no slope or slant
A roof is considered flat is the pitch is less than ___________
10 degrees
Why is re-covering considered to be about 50% greater risk than replacing the roof system?
- Anchoring through the old system requires longer fasteners.
- Moisture retained in the old system can corrode the fasteners.
- Flashings are more complicated
What is RICOWI
Roofing Industry Committee on Wind Issues
What are RICOWI’s goals?
- to promote and coordinate research
- accelerate the promulgation of mew standards for design and testing
- educate the building industry on roof problems
