Slate Roof Headlap

Generally speaking 20degrees is the lowest advisable pitch for a slate roof depending on the size of the slates and how much that the roof is exposed to moderate weather conditions.

Slate roof headlap.

Bs 5534 2014 is the code of practice for slating and tiling. Headlap and exposure are related to each other and the starting point for determining both is roof slope. For example a 10 inch by 20 inch slate requires 170 slates per square a square is 100 square feet of roof coverage when installed with a 3 inch headlap but requires 180 slates per square when installed with a 4 inch headlap. Headlap exposure and offset.

Furthermore you want to make sure the slates are manufactured with the nail holes in the right place. Headlap as defined in the national slate association s slate roofs design and installation manual 2010 edition is the length in inches of the upper portion of a roofing slate that is covered by the butt of the slate two course above. The part of the lapping system where there are three layers of slate. Most significant is the environment with the two main factors being exposure to wind and rain.

Minimum headlap for fixing slates with nails or hooks the installation of a slate roof involves a number of aspects that must be considered in the design process. When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side overlaps. The primary aspects to be considered are.