1. What is a Skillion Roof?

A skillion roof (also known as a shed roof or mono-pitched roof) is a single, sloping roof surface that is not attached to another roof surface. It's a popular modern roofing style in Australia due to its contemporary appearance and cost-effectiveness.

2. How Does the Calculator Work?

The calculator uses the pitch formula:

Where:

• \( Rise \) — Vertical height difference (mm)
• \( Run \) — Horizontal distance (mm)
• Result is in degrees (°)

Explanation: The calculator determines the angle of your roof pitch based on the vertical rise and horizontal run measurements.

3. Importance of Minimum Pitch in Australia

Details: Australian building standards require a minimum 5° pitch for skillion roofs to ensure proper water drainage and prevent pooling. Different roofing materials may require specific minimum pitches.

4. Using the Calculator

Tips: Measure the vertical rise and horizontal run in millimeters. Enter both values to calculate the pitch angle and verify it meets Australian standards.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a minimum pitch requirement?
A: Minimum pitch ensures proper water drainage, prevents leaks, and meets Australian building code requirements.

Q2: Can I have a pitch less than 5° in Australia?
A: Generally no, unless using specialized roofing systems with specific waterproofing methods approved by building authorities.

Q3: How do I measure rise and run accurately?
A: Use a spirit level and measuring tape. Measure vertically from highest to lowest point (rise) and horizontally the full length (run).

Q4: Does roof material affect minimum pitch?
A: Yes, some materials like metal roofing can work with lower pitches than tiles, but 5° is the general minimum standard.

Q5: What if my calculated pitch is below 5°?
A: You may need to adjust your design, consult a building professional, or apply for special approval with engineered solutions.