Welhaus specialises in panelised construction, for residential, commercial, public and community applications. We work with clients in a number of modes: we can supply design for your building and the ‘flat-packed’ panel kit for your building team to assemble; or work in with your architect to produce a bespoke design, just for you.

Welhaus pre-engineered panels are the basic elements of the Welhaus building system. Like other international leaders in panelisation, our designs are based on a 1.2m2 grid system.

A single module build

A single module build

A two storey home

A two storey home

Row and terraced housing

Row and terraced housing

Extension onto existing building

Extension onto existing building

Multi-level developments

Multi-level developments

Six advantages of prefab


Greater accuracy thanks to computer controlled production and craft person supervision.


Construction is unaffected by the weather and so it’s easier to keep within project deadline.


Construction time on-site is minimised so within 3 days your house can be weatherproof and secure.


Prefabrication is more energy-efficient and produces less waste so it is a more ecofriendly way of building.


Faster on-site construction means less disruption for you and your neighbours.


Greater ability to control quality, timing and therefore cost.

Quality starts with the selection and testing of the building materials. We use only high-quality timber that contains no potential pollutants and the engineered timber on the inside of your house is low in VOC. Unless specified by your building code, chemical preservatives are not used in framing timber and timber is dried in chambers and then stored in a dry atmosphere on site. The house is thermally insulated with an innovative Recycled wool insulation which ensures not only excellent moisture control, heat retention and energy efficiency, but ensures your home safeguards your health as much as possible.

All large elements such as walls, ceilings and roofs are prefabricated on our computer controlled production line. Many of the windows and some of the doors are fitted in the factory to avoid having to use harmful PU foam fillers. The façade is protect environmentally-friendly paint in the colour of your choice.

The interior design team working in the factory will always be present to control the machines, monitor quality, put the finishing touches to your home and only after your home passes a final inspection will your house be wrapped in a waterproof layer ready for transportation directly to your site.

The benefits of wood

Crucially, the use of wood supports environmental wellbeing. Wood stores carbon, and simply put, wood products require less energy to manufacture than equivalent materials such as steel. Due to its amazing thermal insulation properties, we save energy when running wooden homes and buildings. Welhaus is also proud that the use of wood products helps mitigate pollution – very little waste is generated through the manufacture of timber and wood products, used in our buildings.

Wood creates naturally healthy living conditions for ourselves and our families. – Its use helps maintain humidity balance, rooms warm up quickly and condensation is kept to a minimum. Wood is durable: more resistant to heat, frost, corrosion and pollution. Wood buildings are lower maintenance and therefore have lower running costs. Timber is inexpensive when produced in New Zealand.

Wood has the best thermal insulation properties of any mainstream construction material. Timber’s thermal efficiency means walls can often be slimmer, releasing up to 10% more space than other building methods. An external timber wall may have only half the thickness of a brick or concrete wall, yet provide double the thermal insulation value. Timber designs have a beautiful natural character, and wood is extremely versatile as an interior and exterior building material.

Earthquake Resistance of Wood Structures

Engineers have a saying: ‘Earthquakes don’t kill people, buildings do.’ According to TeAra the encyclopedia of New Zealand Destructive earthquakes have taught New Zealanders hard lessons in designing safe buildings. In early Wellington, buildings of brick and masonry collapsed in the 1848 earthquake. As a result, the town was largely rebuilt in wood, and suffered less damage during the magnitude 8.2 earthquake of 1855.

NZ Wood says that in post earthquake Canterbury the advantages to timber buildings are numerous:

  • Timber buildings are up to a third of the weight of the equivalent concrete building giving huge advantages in difficult soil ground conditions.
  • Timber has excellent properties in seismic design, which improves and leads to damage avoidance designs.
  • As a building material it is cost competitive due to increases in productivity and improved manufacturing methods.
  • It is a growing resource with a beneficial value chain.
  • Engineered timber represents new technology that builds on proven materials available now, tested and verified.



A plethora of design finishes awaits you, with a Welhaus construction. We take inspiration from leading international trends in housing design – and where better to turn than Europe? According to the CEI-Bois (European Confederation of Woodworking Industries) Architects are increasingly turning to timber cladding as a way of achieving a contemporary, yet natural look: a timeless elegance and simplicity. Used in combination with insulation materials, it keeps brick walls frost free, reduces heating costs and provides a more comfortable interior.



Welhaus can provide advice on a range of options for styling the interior of your building, be it your own home or commercial development, or public project. Wooden interior finishes (including flooring) are available options and offer a range of advantages; likewise Welhaus recommends windows designed to maintain optimum conditions for a healthy home. Our partnerships with leading kitchen, cabinetry and bathroom fixture suppliers ensures you are able to access quality fittings at exceptional prices.

The interior design team working in the factory will always be present to control the machines, monitor quality, put the finishing touches to your home and only after your home passes a final inspection will your flat pac or modular house kit be wrapped in a waterproof layer ready for transportation directly to your site.


Welhaus’s manufacturing facilities and the plans and specifications for its panels have been approved by local Authorities and our own engineers. Construction of Welhaus’s manufactured homes and the plumbing, heating and electrical systems installed in them must also comply with standards set.

A Local Authority approved organisation regularly inspects Welhaus’s prebuilt homes and other buildings for compliance during construction. The Welhaus Prebuilt homes built to date comply with all present local authority and government requirements. We are planning to get multiuse consent for our most popular designs so that only site specific consents need be applied for. This should reduce time and cost to deliver for those who make their new home one form our series.


Imagine a home that uses a fraction of energy consumption of brick, block and concrete homes and commercial buildings even after transport is taken into account; one that cuts waste, saves you money and protects the environment. Every Welhaus house and commercial building comes with this energy efficiency as standard, providing you with immunity to fluctuating fossil fuel prices, whilst ensuring you do more than your bit for our planet.

Our houses come from nature and can be returned to it; perfectly in tune to the natural cycle and the need now and in the future for ever greater sustainability.
Safeguarding our world has always been at the heart of the philosophy. Primarily using timber, installing the best thermally efficient windows and because our construction process is so energy efficient it has ensured our homes are at least double the quality of those built to typical building codes which would rate them high on programmes such as “LEEDS” and Homestar not to mention the CEMARS: Certified Emissions Measurement And Reduction Scheme : the wood’s locked away more CO2 than is emitted during manufacture, transportation and construction.

Our ecological vision is all-encompassing; it includes the choice of sustainable timber and all building materials, the component design, the manufacturing process, packaging and transportation, waste management and site operations. But it doesn’t end there, for the lifespan of your home, it will continue to run in an energy efficient manner and be truly environmentally friendly.


Natural materials: Your home will be built with only natural, beautiful, pollutant free wood. Unless required by your building code, Timber (primarily Douglas fir from NZ which doesn’t require treatment under most building codes) is not further treated with hazardous chemicals and this improves air quality and your wellbeing .

Air quality: The choice of insulation material very much determines the air quality in a building. Welhaus in condition with its supply partners has developed its building system to accommodate recycled wool insulation material naturally, fire, fungus and pest resistant. Using the natural and avoiding artificial fibres means you can breath easy.

Good ventilation is also essential. Welhaus’s natural walls are able to breathe and thus extract condensation quicker than it is created. Our airtightness construction rap material allows moisture to diffuse to help maintain the right moisture levels and air quality inside the house and since dust mites cannot survive below 55% humidity, this can help people with allergies.

The Welhaus system can be summarised as:

  • Thermal insulation with natural recycled NZ wool in walls, ceilings and roof
  • Low energy consumption as a result of thick energy-efficient timber walls
  • Maximum energy savings as a result of European quality windows with highest thermal performance
  • Carbon neutral and even carbon positive homes and commercial buildings available
  • Excellent climate and fresh air supply controlled by decentralised ventilation with heat recovery
  • The construction materials are reusable, recyclable, biodegradable and thus sustainable
  • Emphasis on renewable energy sources such as heat pumps, wood pellet heating and solar units