A warm, dry home is a healthy home - Building NZ
A warm, dry home is a healthy home

A warm, dry home is a healthy home

Often when building, it’s the decisions around which materials you choose, including the ones you’ll never see, that have the greatest impact on the eventual comfort and liveability of your home.

Words by ArchiPro Editorial Team

Building a new home is a major project for most of us, with many decisions and choices to be made along the way—and not all related to the decorative details.

There’s the overall aesthetic, colours and finishes to consider and then there is the practical side, which includes products and materials that can’t easily be seen. But these shouldn’t be underrated—many of them can have a huge impact, not only on the health and wellbeing of the people living there, but also on the structural integrity and longevity of the house.

A healthy home is one that is dry and well ventilated; it should also be energy efficient and easy to keep warm in winter and cool in summer. To achieve this, architects, developers and builders need to ensure the homes they design and build use quality materials and systems.

New Zealand-owned and operated Ebuilt has developed a track record over the past 20 years for the quality of the hardware products that it sources and distributes.

Company Owner and Director Malcolm Macnaught says that over the 20 years Ebuilt has been operating, it has concentrated on sourcing premium products from around the world that are “best in class”.

“A home is the largest, most valuable asset most people own and it should be protected over the long term. We work hard to find products that do the best possible job for architects, builders, roofers, developers and, ultimately, for the homeowners,” he says.

The Ventia underlay systems are low water vapour resistance underlays and can be used as part of a warm, non-ventilated or cold, ventilated roof system.

Ventia underlays: contributing to healthy homes

The company’s latest products, Ventia Iron and Ventia Platinum Plus, are top-of-the-line roof and wall underlays made in Europe by one of the most technologically advanced membrane manufacturers in the world, mdm®NT.

The BRANZ-appraised Ventia system comprises two high-performance underlay products for roof and wall applications that can be installed in both residential and commercial projects. Ventia Iron Roof & Wall Underlay is used for residential builds and self-supporting Ventia Platinum Plus Heavy-Duty Underlay is generally specified for commercial projects and for homes with low-pitched roofs.

The key features of a good underlay system in a home should be the levels of absorbency and breathability it offers. In New Zealand, high humidity naturally leads to problems of condensation, and daily activities such as cooking, showering and using a laundry dryer create water vapour. If this can’t escape, your house will end up with problems of condensation that can lead to the growth of mould.

Mouldy homes lead to poor health outcomes, such as asthma and other respiratory illnesses. And the other impact of dampness issues is long-term damage and degradation to our homes. As we know, these problems can be costly and difficult to fix.

Ventia underlay is a technologically advanced product that has been designed to have exceptional absorbency and breathability, with its three layers cleverly bonded together to create a product that lets humid air escape out through it, while also being highly absorbent and repelling water from the outside.

Typically, in a house, when the outside temperature drops during the night, water vapour will contact with a surface that is at a lower temperature than itself, the air is chilled at the point of contact and sheds its surplus water vapour on that surface, initially in the form of mist and, if excessive, eventually in the form of droplets of water. If an underlay isn’t absorbent and breathable enough, water can condense on the inside of it during this cool night phase, with the risk it may drip, run or pool in places where it can lead to mould growth. Non-existing insulation and ventilation will highly contribute to condensation to happen. Ventia underlay is highly absorbent, important in these cooler night times to avoid this issue within the home. And it is highly breathable, so less humidity gets trapped in the home in the first place. The combination of absorbency and breathability gives you a dryer, healthier home.

Ventia Iron consists of a micro-porous, water-resistant polypropylene film laminated between two layers of spun-bonded polypropylene and has been deemed compliant with the New Zealand Building Code.

Ventia underlays: European innovation right here in New Zealand

The quality of the raw materials and the way Ventia is made ensure this award-winning product has very high tensile strength and tear resistance, making it suitable to use in all wind zones New Zealand-wide.

Ventia Iron wall underlay is also designed to withstand 90 days’ UV exposure, which allows builders more time to complete exterior cladding and deal with any delays that arise during the building process, potentially saving time and money.

Both Ventia underlays are simple and quick to install and Ebuilt supplies all the necessary flashing tape and penetration seals, which are also BRANZ-appraised.

Both underlays are certified as fire retardant and are made using zero-waste production methods. They are also internationally quality certified, have received awards from prestigious, independent international organisations, and can be seen at the most important construction Fairs in Europe.

Learn more about the roof and wall underlay products available for your next residential or commercial project.

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