CSLB C-39 Roofing ContractorSteep-Slope RoofingMedium
A roofing crew is installing clay pan and cover tiles on a residential roof with a 4:12 slope. To ensure proper weather protection and drainage, what is the minimum required headlap for these tiles?
- A5 inches
- B4 inches
- C2 inches
- D3 inches
Show answer & explanationAnswer & explanation
Correct answer: D. 3 inches
For clay pan and cover tiles on slopes of 4:12 or greater, the minimum required headlap is 3 inches. This ensures adequate overlap for weather resistance.
Why the other options are wrong
- A. 5 inches is generally excessive and not the minimum requirement for this tile type and slope.
- B. 4 inches is a common headlap for certain tile types or steeper slopes, but not the minimum for this scenario.
- C. 2 inches is typically insufficient for clay pan and cover tiles on this slope.
Clay Tile Headlap
Headlap for clay tiles is the distance a tile overlaps the tile in the course directly below it, measured from the butt end of the upper tile to the top of the lower tile.
- Ensures watertight seal.
- Varies by tile type and roof slope.
- Critical for drainage.
Memory trick: Tiles overlap to shed water, headlap is key to that chapter.