Masterspec
01 Apr 2025
Document Referencing and Scheduling with eCert
Our editor team has updated all Masterspec work sections which have references to environmental documents. Where environmental document references...
27 Mar 2025
Update Manager New Features
The new Update Manager features are designed to boost productivity when applying changes to updated work sections. Simplify work section updates with...
03 Mar 2025
CIL is Now Accepting Product Carbon Data for the National Embodied Carbon Data Repository for Construction.
CIL Masterspec is now accepting carbon information in the form of Environmental Product Declarations (EPDs) or Life Cycle Assessments (LCAs) from...
06 Jan 2025
Carbon 2025 and Beyond: Building a More Sustainable Future for NZ Construction
In July 2024, Construction Information Ltd (CIL) and the Building Research Association of New Zealand (BRANZ) announced a partnership to develop a...
01 Nov 2024
Introducing eCert: A Game-Changing Tool for Sustainable Construction
As the New Zealand construction industry increasingly focuses on sustainability and carbon reduction, there is a growing need for tools that can help...
26 Sep 2024
Masterspec Specified: Manawa House by Cube Architecture
"Masterspec has been an indispensable tool for our project Manawa House. During the specification, Masterspec streamlined our entire specification...
26 Sep 2024
Masterspec Specified: Award Winning Ligar Bay Bach by Young Architects
"Masterspec was used for providing a detailed, fully customised, specification as part of our comprehensive project documentation for the Ligar Bay...
25 Sep 2024
Masterspec Specified: Hilltop Home by Jon McAlpine Architecture
“Masterspec is a critical component in our studio. Its user-friendly platform and regular product specification updates, keep us constantly on the...
06 Aug 2024
NZ Building Code Changes: Type 1 Domestic Smoke Alarms
In Masterspec NOTES June 2024, we provided commentary around the changes to the NZ Building Code relating to domestic smoke alarms.
18 Jul 2024
New Industry Initiative to Reduce Carbon Emissions of New Zealand Buildings
A new industry-led initiative aims to reduce the environmental impact of Aotearoa New Zealand’s buildings, which contribute up to 20% of the national...
04 Jul 2024
Masterspec Announces New MasterKey4 for Revit 2025 Enhancements
Streamlined Workflows and Improved Collaboration with MasterKey4. We are excited to announce the latest update to MasterKey4 for Revit 2025, designed...
04 Jun 2024
Building Code Updates 2023-2024
This month we have published amendments in response to building code updates. The 2023-24 NZBC changes were published by MBIE on the 2 November 2023,...
04 Jun 2024
NZ Building Code Changes: Type 1 Domestic Smoke Alarms
From November 2023 the Building Code Acceptable Solutions for Protection from Fire (C/AS1 and C/AS2) have been amended to make Type 1 interconnected...
05 Apr 2024
Understanding Project Scope and How to Specify Window Systems
It is vital that Movement and Deflection criteria are correctly defined in the Specification. We cannot over emphasize the importance of correctly...
04 Apr 2024
MBIE Building Consent System Review - Overview and Update
In July 2022, MBIE commenced a review of the building consent system, as part of the Building System Reforms to improve the consenting process. The...
30 Nov 2023
NZCIC Guidelines Responsibility Schedule Goes Digital
The new online tool enables real-time collaboration among multiple stakeholders, fostering efficiency and innovation in construction processes.
10 Nov 2023
BCA Requests to Modify Manufacturers Technical Content
mDocs allows the specifier to quickly access the latest version of a document uploaded by the manufacturer or supplier. Importantly, these detailed...
27 Sep 2023
Masterspec Specified: Award Winning Taharoto Lane by X Studio Architects
The development will have 19 units, including studio, office, and retail space. The residential units will have balconies with views of the city...
27 Sep 2023
Masterspec Specified: Award Winning Soaring Box House by Turner Road Architecture
The house’s unique design fits into the rural landscape. The house has a cantilevered structure and a soaring angular volume. The interior design is...
13 Sep 2023
Hallmark Group Opens Up About BPIR
Recently, Hallmark Group turned to Masterspec, a trusted name in compliance solutions, for guidance on their BPIR for fire doors. In this article, we...

NEW GENERIC SECTION 7455 STORMWATER SOAKAGE SYSTEMS

17 Dec 2019

The section relates to the design, supply and installation of stormwater soakage systems for residential and non-residential applications.

Stormwater soakage systems are required for properties with no reticulated system provided by council for removing run-off from roofs and sealed hard surfaces.  They can be:

  • soak pits consisting of holes filled with rocks and underground chambers with porous sides and base, lined with filter cloth to provide soakage
  • soak holes comprised of excavated pits with sides and top wrapped in filter cloth and back filled with scoria, circular scoria filled pit constructed from concrete blocks with a precast lid, and pre-cast concrete manholes designed for soakage in fractured rock areas

Pre-treatment devices are required to feed into the soak pits/soakholes and the type suitable will depend on the situation.  For example:

  • for paved areas of more than 20m² - sand filter, filter-strip and scoria trench apply (provide a high level of treatment)
  • for paved areas of less than 20m² - catch pit applies (provides minimal treatment)
  • for roof areas - settling chamber applies (removes coarse solids only)

Guidelines for soakage design including sizing are provided in Verification Method NZBC E1/VM1 or can be obtained from your local council.  The first step in designing a soak pit is to determine the soakage rate of the natural ground.  This is done by conducting a percolation test and, from the results of the test, determining the soakage rate.  As part of the building consent application calculations for soak pit sizing must be approved by the BCA.

7455 STORMWATER SOAKAGE SYSTEMS is available in Standard, Structural & Civil, Services, Landscapes and Basic.