Six roofs, drawn in plan.

Concept projects

• Concept P-01

  Long gable on a forested slope

  Single-storey timber-and-stone residence

  Geometry

  Long gable, two planes, deep overhangs

  Profile

  Standing seam, coated steel

  Colour

  Charcoal

  Challenge

  A long unbroken run where oil-canning and heavy needle fall would show immediately.

  Solution

  A heavier gauge over a rigid deck, a ventilated air gap and a continuous valley-free layout that keeps the roof easy to clear.

• Concept P-02

  Mono-pitch studio

  Modern two-storey studio house

  Geometry

  Single plane, high-side parapet

  Profile

  Batten seam, zinc

  Colour

  Zinc

  Challenge

  A single high edge meets a wall, so water and snow converge on one flashing line.

  Solution

  A detailed head wall flashing with a back dam, concealed gutter and snow rails set where the roof meets the walkway.

• Concept P-03

  Cross-gable family home

  Two-storey house with an added wing

  Geometry

  Cross-gable with two valleys

  Profile

  Snap-lock, aluminium

  Colour

  Bronze

  Challenge

  The valleys collect water from two large planes and are the usual first point of failure.

  Solution

  Open, wide valleys formed from a single sheet, wider underlayment overlaps beneath, and panels cut to land cleanly on each side.

• Concept P-04

  Hipped farmhouse

  Renovated farmhouse with wraparound porch

  Geometry

  Four-plane hip with a short ridge

  Profile

  Standing seam, coated steel

  Colour

  Forest

  Challenge

  Tapering panels at four hips, with a chimney and a vent stack breaking the surface.

  Solution

  Tapered panels laid out from the centre of each plane so the seams stay symmetrical, with cricket and boot flashings on the penetrations.

• Concept P-05

  Butterfly roof by the water

  Low-slung coastal house

  Geometry

  Two inward-sloping planes, central valley

  Profile

  Standing seam, aluminium

  Colour

  Bone

  Challenge

  A central gutter carries the whole roof, in salt air, with very little margin for error.

  Solution

  Aluminium throughout, a generously sized welded valley with overflow scuppers, and compatible fasteners at every point.

• Concept P-06

  Lodge with dormers

  Steep-pitched lodge with three dormers

  Geometry

  Steep gable with eyebrow and gable dormers

  Profile

  Flat-lock, zinc

  Colour

  Slate blue

  Challenge

  Small, steep planes at the dormers where long panels would not fit and snow slides on to a deck.

  Solution

  Flat-lock pans on the dormers that follow their curves, standing seam on the main plane, and snow guards above the entry.