Essential tips for DPC and weep hole building code compliance.

We know that in the day-to-day hustle of construction projects, the finer details can sometimes slip through the cracks. That’s why we’re here to help. Ensuring building code compliance for damp-proof courses (DPC) and weep holes is crucial to keeping moisture at bay, protecting structures and avoiding inspection delays.

Here’s a practical guide to minimise roadblocks and deliver high-quality, compliant projects.

The importance of DPC and weep holes

DPCs and weep holes are key to safeguarding buildings from moisture damage:

• DPCs act as barriers to prevent rising damp, preserving the integrity of buildings
• Weep holes allow trapped moisture to escape, reducing the risk of mould and structural issues.

Addressing these elements early ensures your project meets building code compliance and avoids costly rework later.

Key considerations for compliance

To avoid setbacks, make sure these critical areas are covered:

• Follow NCC requirements:
  • DPC must be a minimum of:
    • 150mm above adjacent ground level
    • 50-75mm above paved or concreted areas that slope away from the wall (50mm is only permitted with compliant surface drainage and area covered)
  • Weep holes should be positioned directly above the DPC or flashing.
    (Refer to NCC clause 5.7.4 for detailed requirements.)
• Coordinate termite management systems (TMS):
  • While TMS can sometimes double as DPC, ensure your setup meets compliance for both purposes. Early communication with your TMS provider is essential.
• Plan for adjacent surfaces:
  • Consider pathways, patios, or driveways that may sit near DPC levels
  • Adjustments like deeper slab rebates can help position the DPC and TMS correctly.

Quick checklist for DPC and weep hole compliance

1. Visible DPC: Ensure the DPC is visible on the exterior face of the wall
2. Proper weep hole placement: Position weep holes directly above the DPC or flashing
3. Meet spacing & height requirements:
   • Minimum weep hole height: 50mm
   • Maximum spacing: 1.2m apart.

Tip: Early coordination with your team and subcontractors can help you stay ahead of compliance requirements.

Proactive planning for better outcomes

With increased scrutiny on masonry and weatherproofing compliance by the Building Commission, addressing DPC and weep hole requirements early is more critical than ever.

Working closely with bricklayers and TMS contractors helps align your project with building code compliance and minimises inspection delays.

We’re here to help you focus on the big picture while ensuring the finer details are compliant and high quality. Whether you have questions about DPC, weep holes or other compliance needs, we’ve got you covered.

Reach out today for help with your next project.

We’re here to help ensure your projects are up to code.Partner with Buildcert to streamline the certification process for your development project. Our expert team ensures compliance every step of the way, so you can complete your project on time and with confidence. We make certification simpler, faster, and stress-free.

Speak with our team today