An architectural roof plan is a drawing that shows the shape, layout, and details of a building’s roof, viewed from directly above (like a bird’s-eye view).
🔹 What it shows:
- Roof shape & slope (flat, gable, hip,
etc.)
- Ridges, valleys, and hips (where roof planes
meet)
- Overhangs & eaves
- Chimneys, skylights, dormers, vents, gutters
- Drainage points (downspouts, rainwater pipes)
- Roofing material (tiles, sheet, concrete,
etc.)
- Dimensions & slopes (noting pitches,
usually in ratios like 1:10 or angles like 30°)
🔹 Purpose:
- To guide builders in constructing the roof
correctly.
- To show how water will drain off the roof.
- To help estimate materials and costs.
- To coordinate with structural drawings
(trusses, beams, rafters).
🔹 What you’ll typically
find on a roof plan:
- The outline of the entire roof
- Pitch/slope directions (arrows or symbols
showing how water flows)
- Ridges, hips, and valleys where roof sections
meet
- Openings like skylights, chimneys, solar
panels, exhaust fans
- Drainage elements like gutters and downspouts
- Dimensions (roof lengths, slopes, overhang
sizes)
🔹 Why it’s important:
- Ensures the roof is built to design
- Helps plan for rainwater drainage
- Useful for roof framing and material calculations
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