Building Code Requirements for Stairs and Balustrades in New Zealand

1. Building Code Compliance (NZS 3604 and NZBC F4/AS1)

In New Zealand, stairs and balustrades must comply with the New Zealand Building Code (NZBC), specifically Clause F4: Safety from Falling. Key requirements include:

  • Height of Balustrades:
    • For residential buildings, balustrades must be at least 1 meter high above the floor or stair nosing.
    • For commercial buildings, the height requirement is 1.1 meters.
  • Gap Restrictions:
    • Openings in balustrades must not allow a 100mm sphere to pass through (to prevent children from getting stuck or falling).
  • Load-Bearing Capacity:
    • Balustrades must withstand a horizontal load of 0.6 kN/m (kilonewtons per meter) for residential use and 1.5 kN/m for commercial use.
  • Stair Dimensions:
    • Rise: Maximum 190mm per step.
    • Going (tread depth): Minimum 240mm per step.
    • Consistency: All steps must have uniform rise and going to prevent tripping hazards.

2. Glass Balustrade Considerations

Glass balustrades are a popular choice for modern homes due to their sleek appearance and ability to maximize light and views. However, there are specific factors to consider:

Facts and Factors to Consider

  1. Glass Type:
    • Toughened (Tempered) Glass: Required for safety. It is 4–5 times stronger than regular glass and shatters into small, blunt pieces if broken.
    • Laminated Glass: Consists of two or more layers of glass with a PVB interlayer, providing additional strength and safety.
  2. Thickness:
    • Typically, 10mm–12mm toughened glass is used for balustrades. Thicker glass (e.g., 15mm) may be required for taller or more demanding installations.
  3. Frameless vs. Framed:
    • Frameless: Provides a minimalist look but requires precise installation and strong fixings.
    • Framed: Uses metal or wood frames for added support and stability.
  4. Handrail Requirements:
    • Glass balustrades must have a handrail if the height exceeds 1 meter. The handrail should be securely attached and easy to grip.
  5. Spigots or Clamps:
    • Glass panels are often supported by stainless steel spigots or clamps. These must be securely fixed to the floor or structure to ensure stability.
  6. Edge Finishing:
    • Glass edges should be polished or smoothed to prevent injury.
  7. Maintenance:
    • Glass balustrades require regular cleaning to maintain their appearance. Toughened glass is durable but can show fingerprints and smudges.
  8. Compliance Documentation:
    • Ensure your installer provides a Producer Statement (PS1) to confirm compliance with building codes.

3. Why Choose Royal Glass for Your Balustrade Needs?

At Royal Glass, we specialize in designing and installing high-quality glass balustrades that meet all safety standards and enhance the beauty of your home. Here’s why you should choose us:

  • Expertise: We have years of experience in glass balustrade installation and compliance.
  • Quality Materials: We use only toughened or laminated glass for safety and durability.
  • Custom Designs: Tailored solutions to match your home’s style and requirements.
  • Compliance Guarantee: We ensure all installations meet NZBC standards and provide necessary documentation.
  • Referral Network: While we don’t handle stairs, we work with trusted stair specialists who can provide PS1 documentation and expert advice.

4. Call to Action

Ready to transform your home with a stunning and safe glass balustrade? Contact Royal Glass today for a free consultation!

📞 Call us now at 0800 769 254
📧 Email us at support@royalglass.co.nz
📍 Visit our showroom at 13E Paul Matthews Road, Rosedale, Auckland 0632
🌐 Explore more at www.royalglass.co.nz

Let Royal Glass guide you through the process of designing and building a balcony or balustrade that meets your needs and complies with all safety standards. Contact us today for a free consultation!


5. Additional Notes for Clients

  • Stair Specialists: While we focus on balustrades, we can refer you to experienced stair specialists who can handle the stair design, construction, and PS1 documentation.
  • Free Consultation: We offer a no-obligation consultation to discuss your project and provide a tailored solution.
  • Compliance Assurance: All our work meets NZBC standards, giving you peace of mind.