NASCLA Commercial General Building Contractor Exam — All Questions
Alltopics.nascla_procurement_contractingtopics.nascla_general_requirementstopics.nascla_site_constructiontopics.nascla_concretetopics.nascla_metalstopics.nascla_mechanical_plumbingtopics.nascla_woodtopics.nascla_thermal_moisturetopics.nascla_finishestopics.nascla_masonrytopics.nascla_doors_windows_glazingtopics.nascla_electrical
1 questions
topics.nascla_thermal_moisture
At the intersection of a roof and a vertical wall or penetration, what component is installed to prevent water intrusion?
- a.A vapor retarder only
- b.A control joint
- c.A weep screed
- d.Flashing✓
Flashing is the sheet material installed at roof-to-wall junctions, penetrations, and other transitions to direct water away and prevent leaks. It is one of the most failure-prone areas of the building envelope, so correct flashing detailing is critical to thermal and moisture protection.Roofing / flashing (thermal and moisture protection)