1. What is NZ Pitch?

NZ Pitch is a standard measurement used in New Zealand (NZS 3604) to express roof slope, calculated as the ratio of vertical rise to horizontal run. It's a unitless value that represents the steepness of a roof.

2. How Does the Calculator Work?

The calculator uses the NZ Pitch formula:

Where:

• \( Rise \) — Vertical height (meters)
• \( Run \) — Horizontal distance (meters)

Explanation: The equation calculates the roof pitch as a simple ratio of vertical rise to horizontal run, following New Zealand building standards.

3. Importance of Roof Pitch Calculation

Details: Accurate roof pitch calculation is essential for proper drainage, structural integrity, material estimation, and compliance with New Zealand building codes (NZS 3604).

4. Using the Calculator

Tips: Enter both rise and run measurements in meters. Both values must be positive numbers greater than zero for accurate calculation.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical roof pitch in New Zealand?
A: Typical residential roof pitches in NZ range from 15° to 30°, which corresponds to pitch values of approximately 0.27 to 0.58.

Q2: How does NZ pitch differ from angle measurement?
A: NZ pitch is a ratio (rise/run), while angle is measured in degrees. You can convert between them using trigonometric functions.

Q3: Why is roof pitch important for construction?
A: Proper roof pitch ensures adequate water drainage, affects snow load capacity, influences material choices, and impacts the overall aesthetic of the building.

Q4: What are the minimum pitch requirements in NZ?
A: Minimum pitch requirements vary by roofing material. Corrugated iron typically requires at least 3° pitch, while concrete tiles may need 15° or more.

Q5: Can I use this calculator for existing roof measurements?
A: Yes, this calculator works for both planning new constructions and measuring existing roof pitches, provided you have accurate rise and run measurements.