Design Services

Our architects and building surveyors work hand-in-hand to ensure you get a property that looks great, and will remain watertight into the future. Remedial design takes into account all the elements that need to be replaced, repaired or amended to remedy the issues and prevent them from recurring. This means Remedial Design is far more complex than designing a new building. 

What we can provide for you

Typical services and stages might include:

  • Site assessment and feasilibity studies

  • Conceptual design

  • Developed design

  • Detailed design

  • Resource consent documentation

  • Building consent documentation

  • Working drawings

  • Quantity Surveying Services


Residential Design

We offer residential design services, including private houses and multi-unit dwellings. Our architects have a wide range of experience in the residential sector and have won NZIA awards for their projects. Our experience in remedial works means we are highly competent in designing buildings that not only meet the requirements of the brief, but do so in a way that is designed to last a long time.

Commercial Projects

We currently have a number of remedial projects with values ranging from $3 million to $15 million, so are dealing with large projects on a daily basis. Our staff is experienced in new build commercial projects and have worked on office buildings, recreation facilities, mixed use developments, office fit-outs, hospitals, community and institutional buildings and industrial buildings.

Cladding Design

Cladding design involves the appraisal of architecture, aesthetics and science of materials to form a weathertight building enclosure. We regularly provide design reviews of building enclosures for architects. Internationally, architects recognise the value in obtaining specialist advice regarding building enclosures.

Enclosure Design

Our experience with building science and remediation processes provides you with enclosure design that exceeds expectations.


Independent Building Enclosure Design Review

The purpose of the review is to evaluate whether the enclosure of the building, if built in accordance with the plans and specification, would satisfy the performance requirements of the building code. The building enclosure is the parts of a building, above or belowground, that physically separate the exterior environment from the interior environment.

Our design review service is offered in three stages. The three reviews are held at the following stages of the design process:

·       Stage 1:  To be undertaken on completion of the concept design

·       Stage 2:  To be undertaken 30% through the detailed design

·       Stage 3:  To be undertaken on completion of the detailed design

Stage 1: Risk reduction

A review of the concept design to identify the areas of design risk that need to be mitigated. The output from this phase is a commentary regarding the proposed design and materials selection.

Stage 2: Identify, evaluate and recommend

This stage involves a review of documents to identify features or details that need further design consideration.  A written list of issues is provided with recommendations for improvement or a letter confirming that the design is satisfactory.

Stage 3: Check

Checking the changes made in response to the items raised within Stage 2. This will include collaboration with parties to provide design assistance regarding direction on how features or details need to be changed.

Providing a letter stating that the design review has been conducted and the building enclosure would, if built in accordance with the reviewed plans and specification, satisfy the performance requirements section E2 of the building code. 



Performance modelling

We offer a range of computer modelling services that predict the performance of your building during the design phase. This analysis determines that the design satisfies the requirements specification and supports design trade-off decisions. The modelling available includes:

  • WUFI
  • Energy Efficiency (THERM)


WUFI® (Wärme und Feuchte instationär) is a software family which allows realistic calculation of the transient coupled one and two dimensional heat and moisture transport in multi-layer building components exposed to natural weather. It is based on the newest findings regarding vapour diffusion and liquid transport in building materials and has been validated by detailed comparison with measurements obtained in the laboratory and on IBP's outdoor testing field.

WUFI can be used for assessing:

  • the drying time of masonry with trapped construction moisture
  • the danger of interstitial condensation
  • the influence of driving rain on exterior building components
  • the effect of repair and retrofit measures the hygrothermal performance of roof and wall assemblies under unanticipated use or in different climate zones.

WUFI is a tool for developing and optimising building materials and components. WUFI is directed at manufacturers of building products, consultants, designers, engineering offices and experts in the field of hygrothermics.


Building physics is one of the keys to a successful building project. The Fraunhofer Institute for Building Physics IBP focuses its work on research, development, testing, demonstration and consulting in the various fields of building physics. These include noise control and sound insulation in buildings, the optimisation of auditoria acoustics and solutions for improving energy efficiency and optimising lighting technology. Fraunhofer IBP’s work also covers issues of climate control and the indoor environment, hygiene and health protection, building material emissions, weatherproofing and protection against heat and moisture, preservation of building structures and the conservation of historic monuments. 

PC-Program for calculating the coupled heat and moisture transfer in building components

Realistic calculation of the transient hygrothermal behaviour of multi-layer building components exposed to natural climate conditions.

The menu-driven PC program WUFI (Wärme und Feuchte instationär - Transient Heat and Moisture), developed by IBP and validated using data derived from outdoor and laboratory tests, allows realistic calculation of the transient hygrothermal behaviour of multi-layer building components exposed to natural climate conditions. WUFI is based on the newest findings regarding vapour diffusion and liquid transport in building materials. WUFI only requires standard material properties and easy-to-determine moisture storage and liquid transport functions. WUFI can use measured weather data - including driving rain and solar radiation - as boundary conditions, thus allowing realistic investigations on the behaviour of the component under exposure to natural weathe

Below is a screen shot of the system.

Energy Efficiency (THERM)  

Two-Dimensional Building Heat-Transfer Modelling

THERM is a state-of-the-art computer program developed at Lawrence Berkeley National Laboratory (LBNL) for use by building component manufacturers, engineers, educators, students, architects, and others interested in heat transfer. Using THERM, you can model two-dimensional heat-transfer effects in building components such as windows, walls, foundations, roofs, and doors; appliances; and other products where thermal bridges are of concern. THERM's heat-transfer analysis allows you to evaluate a product’s energy efficiency and local temperature patterns, which may relate directly to problems with condensation, moisture damage, and structural integrity.

THERM’s two-dimensional conduction heat-transfer analysis is based on the finite-element method, which can model the complicated geometries of building products.

wufi plus 2.png

Sustainability Assessment

HomeStar assessment 

HomeStar is an independent rating tool that certifies the health, efficiency and sustainability of New Zealand homes. 

A home is rated on a 1-10 scale: a rating of 1 Homestar means it needs significant work, and 10 Homestar indicates international best practice. Most existing New Zealand homes only achieve a 2-3 Homestar rating. A new home built only to Building Code would achieve 3-4 Homestar.

At 5 Homestar, you have a home that’s better than Building Code; but 6 Homestar is the level at which you’ll start to notice a real difference in terms of better warmth, dryness, health and water efficiency. That’s because it’s certified as having:

  • better levels of insulation than Building Code requires, so your home is cheaper to heat
  • moisture-control measures
  • water-efficiency measures such as dual flush toilets and low-flow showers, to save you money on water and/or hot-water bills.

There’s no one way to achieve a Homestar rating – although houses have to score a mandatory minimum number of points in energy, health and comfort, there are many options in other areas. For example, some people might opt for photo-voltaic panels for solar energy; others may want to score high for good waste practice.

GreenStar assessment 

Greenstar is a commitment to standards of best practice and leadership for the development of environmental tools for buildings in New Zealand. These include:

  • A common language and standard of measurement
  • Promotion of integrated whole-building design
  • Awareness of green building design
  • Recognition of environmental leadership
  • And reduction of environmental impact of development