Massachusetts Unrestricted Construction Supervisor License Practice Test

What is the maximum allowed exposure to the weather of a wood shingle of naturally durable wood used as roof covering on a single-family dwelling, with a roof slope of 3:12, #1 grade, 16 inches in length?

1. 2 1/2 inches

2. 3 inches

3. 3 3/4 inches

4. 4 1/2 inches

The correct answer is: 3 3/4 inches

The correct answer is based on building code regulations regarding the installation of wood shingles. For a roof covering made of naturally durable wood, the exposure refers to the portion of the shingle that is left exposed to the weather after installation. According to common building code practices, particularly those outlined in the Massachusetts state building code and industry standards, the exposure for wood shingles is determined by the slope of the roof and the dimensions of the shingles themselves. In this case, for wood shingles with the specified characteristics — a #1 grade, 16 inches in length, and a roof slope of 3:12 — the maximum exposure should not exceed 3 3/4 inches. This figure ensures sufficient weather protection while also allowing for proper drainage and minimizing the risk of water penetration under the shingles. Proper installation according to these standards maximizes the lifespan of the roofing material and helps maintain the integrity of the structure. Implementing the guidelines that align with these specifications is crucial in preventing moisture-related problems that could arise from improper exposure. Therefore, the maximum allowed exposure for the specified wood shingles is indeed 3 3/4 inches.