Question 37

The minimum side lap for wood shakes shall be 1 1/2 inches.

The minimum side lap requirement for wood shakes is 1 1/2 inches, which ensures proper overlap for weather resistance and structural integrity.

A) 3/4 inch.

A side lap of 3/4 inch is insufficient for wood shakes, as it does not provide adequate coverage to prevent water infiltration and may compromise the durability of the roofing system.

B) 1 inch.

While a 1 inch side lap may provide some overlap, it still falls short of the necessary coverage to protect against moisture and adverse weather conditions, making it an inadequate choice for wood shake installations.

C) 1 1/2 inches.

A side lap of 1 1/2 inches is the correct specification for wood shakes, as it ensures that the shakes overlap sufficiently to guard against water penetration and improves the roof's overall performance and longevity.

D) 1 3/4 inches.

Although a 1 3/4 inch side lap offers even more overlap than required, it exceeds the minimum specification and may not be necessary, leading to potential waste of materials and increased labor without significant benefit.

Conclusion

The correct answer, 1 1/2 inches, meets the established guidelines for wood shakes, ensuring that the roofing system is both effective and efficient in preventing water damage. All other options either fall short of the necessary overlap or exceed the requirement without justification, thus failing to meet the standard for proper installation.