Florida Home Inspector Practice Test

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Study for the Florida Home Inspector Test. Use flashcards and multiple choice questions with hints and explanations. Prepare for success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

A built-up roof with a lap joint every 12 inches has how many plys?

2 ply
3 ply
4 ply
5 ply

The correct answer is: 3 ply

The correct answer is that a built-up roof with a lap joint every 12 inches generally consists of three plies. This configuration typically includes a base sheet, which serves as the foundation, and two additional layers known as plies that are applied over the base sheet. In built-up roofing systems, plies are layers of roofing felts or mats that are saturated with bitumen and staggered to create a waterproof barrier. The staggered design helps to enhance durability and waterproofing. With a lap joint spaced every 12 inches, it allows for the necessary overlap in the plies, typically leading to a three-ply system for adequate waterproofing and structural integrity. Therefore, a three-ply arrangement effectively balances strength, water resistance, and weight for built-up roofing applications.