How many units in 12 is the minimum slope for wood shingles roofing?

The minimum slope for wood shingles roofing is crucial for ensuring proper water drainage and preventing leaks. A slope of at least 3 units in 12 is specified because this angle helps to efficiently shed water off the roof surface.

At 3 units in 12, for every 12 horizontal units, the roof rises 3 vertical units. This slope allows for optimal performance of wood shingles, which are vulnerable to water damage if water is not effectively drained.

While other options indicate slopes that are lower than 3 units in 12, these would not provide sufficient drainage for wood shingles, increasing the risk of moisture accumulation, which could ultimately lead to deterioration and leaks over time. Therefore, a slope of 3 units in 12 is essential for maintaining the integrity and longevity of wood shingles in roofing systems.