Steep-Slope & Mansard Roofs
Steeply pitched and near-vertical planes, where slate has always been the right answer and the coursing is doing most of the design work.
Pitch and exposure
Slate performs best above 4:12 and comes into its own above 8:12. On steep pitches you can run standard 3" headlap; on lower pitches increase the headlap and reduce the exposure accordingly.
Mansards
A mansard is a near-vertical wall wearing a roof, and it is the most visible slate on the building. Decorative coursing—fishscale bands, alternating colours, shaped butts—is traditional here and worth the sourcing effort. Fastening on a vertical plane needs particular attention to the nail line and to slate hooks at replacements.
Access and handling
Steep work slows installation and raises breakage. Budget staging and overage accordingly; 15% is a safer allowance than 10% on a steep, complex roof.
Talk it through with us
Call 225-954-8393 and describe the roof. We will tell you what is realistic.
