The distance from the lower edge of a top shingle to the upper edge of the next lower course is called

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Prepare for the California Roofing Contractor Exam. Utilize flashcards and multiple choice questions with helpful hints and explanations. Boost your confidence and ace the exam!

Multiple Choice

The distance from the lower edge of a top shingle to the upper edge of the next lower course is called

Explanation:
The distance described is toplap. In roof shingle terminology, toplap is how far the upper course covers over the course below along the top edge. This vertical overlap helps seal joints and resist wind-driven water. You measure toplap as the space between the lower edge of the top shingle and the upper edge of the next lower course. By contrast, exposure is how much of a shingle is visible after installation, and sidelap refers to the horizontal overlap between shingles in adjacent rows.

The distance described is toplap. In roof shingle terminology, toplap is how far the upper course covers over the course below along the top edge. This vertical overlap helps seal joints and resist wind-driven water. You measure toplap as the space between the lower edge of the top shingle and the upper edge of the next lower course. By contrast, exposure is how much of a shingle is visible after installation, and sidelap refers to the horizontal overlap between shingles in adjacent rows.

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