Slate Roof Headlap

Headlap exposure and offset.

Slate roof headlap.

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. The part of the lapping system where there are three layers of slate. 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. When slating with a shallow pitch a wide slate is highly recommended for maximum side lap or lateral lap side overlaps.

Most significant is the environment with the two main factors being exposure to wind and rain. Furthermore you want to make sure the slates are manufactured with the nail holes in the right place. It describes not only the means of installing slates nailing or hook fixings but also the headlaps or lap required to ensure that the roof remains watertight even at pitches as low as 20 degrees. 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. According to an identification guide on the slate roof central website some of the hardest heartiest types are purple slate non fading green slate and grayish black buckingham slate which can. The primary aspects to be considered are.