How much overlap do shingles have with the shingle directly below?

When installing shingles, the amount of overlap is critical for ensuring proper water shedding and preventing leaks. The standard overlap for asphalt shingles is usually around 5 to 6 inches, depending on the specific manufacturer's guidelines and local building codes. However, in certain situations, such as for specific roof pitches or in higher wind areas, manufacturers may recommend a greater overlap for added protection.

Choosing 7 inches could be based on a specific manufacturer's recommendation or a particular installation practice aimed at enhancing the roof's durability and performance. It's essential to consult the product specifications for the shingles being used, as following the correct installation guidelines is crucial for ensuring the effectiveness of the roofing system.

Understanding this overlap is vital for anyone involved in roofing to ensure that shingles are installed correctly to protect the underlying structure from water intrusion and damage.