01
The starter completes the first lap
A slate roof begins with an under-course arranged so the first exposed field course has the intended overlap. Starter pieces, joints and fastening must be coordinated; simply placing a normal course at the edge leaves the eave concept incomplete.
02
Cant keeps the field on plane
The eave detail commonly lifts the tails of the first courses so they align with the angle created by the overlapping slate above. The required dimension depends on the slate and assembly. Too little or too much lift can create rocking, open joints or an uneven appearance.
03
Water must leave cleanly
Drip edges, gutter position, fascia, ice protection and roof projection should be designed together. The slate should discharge water into the intended drainage path without trapping the lower edge or directing runoff behind the gutter.