What is the minimum stagger when laying shingles on a roof?

The minimum stagger when laying shingles on a roof is important to ensure proper water shedding and to enhance the aesthetic appearance of the roof. Staggering the shingles helps prevent water from seeping into joints and underneath the shingles, which could lead to leaks and damage over time.

In this case, the correct measurement for the minimum stagger is typically 150 mm (6 inches). This distance allows for enough overlap between rows of shingles, providing a reliable barrier against wind and rain, while also ensuring that the shingles cover the joints effectively. It contributes to the roof’s durability and longevity.

Other measurements, while they may be used in certain applications, do not provide the same level of protection and performance as the 150 mm stagger. Smaller stagers could compromise the roof's ability to manage water effectively, thus potentially leading to structural or water damage issues over time.