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A new Kiwi innovation is about to be launched into the New Zealand roofing market. Created by a chemist who works at Ardex New Zealand’s manufacturing operation in Christchurch, WeldTec contains Impervashield technology, which makes it an especially flexible and versatile membrane for waterproofing roofs and bathrooms, and it can also be manipulated around complex architectural details.

“No one else has this technology,” explains Ronald Rose, technical services manager at Ardex. “This is a New Zealand-developed product created by our rubber chemist. It’s exciting because it’s not shipped from the other side of the world like other waterproofing membranes, reducing its footprint.” On top of that, WeldTec products emit lower emissions than competing products and, at the end of their lifecycle, they can be re-blended or recycled.

A new Kiwi innovation is about to be launched into the New Zealand roofing market. Created by a chemist who works at Ardex New Zealand’s manufacturing operation in Christchurch, WeldTec contains Impervashield technology, which makes it an especially flexible and versatile membrane for waterproofing roofs and bathrooms, and it can also be manipulated around complex architectural details.

“No one else has this technology,” explains Ronald Rose, technical services manager at Ardex. “This is a New Zealand-developed product created by our rubber chemist. It’s exciting because it’s not shipped from the other side of the world like other waterproofing membranes, reducing its footprint.” On top of that, WeldTec products emit lower emissions than competing products and, at the end of their lifecycle, they can be re-blended or recycled.

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WeldTec roofing products successfully launched into the Australian market a year ago, with great uptake, suggests Ronald. “The response from people who have used it is that it improves the application process, compared with existing membranes,” he says.

“It is not as bulky and cumbersome to work with and its inherent flexibility not only makes it excellent as a product, but its applications are better too. This allows one type of membrane to be used throughout all aspects of the waterproofing, which makes the install much more cost-effective.”

Ronald suggests that the installation process is now about 70 to 75 per cent of the overall cost of installing a membrane roofing system (and even more in Auckland). “We have reduced that cost by producing a membrane that shortens the time involved in installing the product and making it easier to do, as well. Let’s face it, time is money,” quips Ronald.

He suggests that it is quicker to install because the sheets can be applied in one piece and manipulated and, due to the superior strength and elongation, there is less risk of issues with rips occurring as a result of high winds and general movement of the building. “Uniquely, it doesn’t need any ancillary products or unnecessary extras, such as seam tapes, seam primers, or base layers or mechanical fixings, which is very important.”

WeldTec roofing products successfully launched into the Australian market a year ago, with great uptake, suggests Ronald. “The response from people who have used it is that it improves the application process, compared with existing membranes,” he says.

“It is not as bulky and cumbersome to work with and its inherent flexibility not only makes it excellent as a product, but its applications are better too. This allows one type of membrane to be used throughout all aspects of the waterproofing, which makes the install much more cost-effective.”

Ronald suggests that the installation process is now about 70 to 75 per cent of the overall cost of installing a membrane roofing system (and even more in Auckland). “We have reduced that cost by producing a membrane that shortens the time involved in installing the product and making it easier to do, as well. Let’s face it, time is money,” quips Ronald.

He suggests that it is quicker to install because the sheets can be applied in one piece and manipulated and, due to the superior strength and elongation, there is less risk of issues with rips occurring as a result of high winds and general movement of the building. “Uniquely, it doesn’t need any ancillary products or unnecessary extras, such as seam tapes, seam primers, or base layers or mechanical fixings, which is very important.”

While Butynol roofing systems have proven themselves to be stable products in New Zealand and Oceania for over 50 years, Ardex’s new technology not only simplifies and speeds up the application process, it also has inherent benefits as a waterproofing product. “In terms of testing, we know that it has excellent UV resistance,” says Ronald. “It also has the ability to overcome inadequate substrate preparation, so it can be used on rougher surfaces or non-conforming substrates.”

There are six types of WeldTec waterproof membranes available, with each designed for different conditions, such as exposed areas, sunlight, heat and ozone; applications like external tiling on decks, roofs, ponds and cavity door flashings; and another has an inbuilt root inhibitor to repel root growth, without killing the roots, on areas exposed to soil and plants. There is also a below-ground system for tanking foundations, basements and so on, and there is an internal under-tiling system for the walls and floors of bathrooms and showers.

It is also possible to combine multiple Ardex products as part of the overall system, such as using one membrane for the roof and another for an adjoining tiled terrace. And tiles can be laid directly on top of the membrane within an hour of being laid, which, of course, speeds up the completion time.

While Butynol roofing systems have proven themselves to be stable products in New Zealand and Oceania for over 50 years, Ardex’s new technology not only simplifies and speeds up the application process, it also has inherent benefits as a waterproofing product. “In terms of testing, we know that it has excellent UV resistance,” says Ronald. “It also has the ability to overcome inadequate substrate preparation, so it can be used on rougher surfaces or non-conforming substrates.”

There are six types of WeldTec waterproof membranes available, with each designed for different conditions, such as exposed areas, sunlight, heat and ozone; applications like external tiling on decks, roofs, ponds and cavity door flashings; and another has an inbuilt root inhibitor to repel root growth, without killing the roots, on areas exposed to soil and plants. There is also a below-ground system for tanking foundations, basements and so on, and there is an internal under-tiling system for the walls and floors of bathrooms and showers.

It is also possible to combine multiple Ardex products as part of the overall system, such as using one membrane for the roof and another for an adjoining tiled terrace. And tiles can be laid directly on top of the membrane within an hour of being laid, which, of course, speeds up the completion time.

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Ardex currently has 30 people working in its Christchurch factory, many of whom have worked there for decades. “We’ve been manufacturing in New Zealand since 1968 and we supply around 700,000 square metres of membrane roofing and tanking into the local market each year,” says Ronald.

“All of our products are installed by Ardex-approved installers, which protects consumers from any ‘cowboys’ who might cut corners to make things work, which acts alongside our extensive 20-year warranty.”

Ronald says that the company is dedicated to keeping its manufacturing operation in New Zealand to keep local jobs: “This is the right thing to do but we also believe it gives us greater quality control and better reliability as a waterproofing membrane.”

More information about Ardex products is available via ArchiPro here.

Ardex currently has 30 people working in its Christchurch factory, many of whom have worked there for decades. “We’ve been manufacturing in New Zealand since 1968 and we supply around 700,000 square metres of membrane roofing and tanking into the local market each year,” says Ronald.

“All of our products are installed by Ardex-approved installers, which protects consumers from any ‘cowboys’ who might cut corners to make things work, which acts alongside our extensive 20-year warranty.”

Ronald says that the company is dedicated to keeping its manufacturing operation in New Zealand to keep local jobs: “This is the right thing to do but we also believe it gives us greater quality control and better reliability as a waterproofing membrane.”

More information about Ardex products is available via ArchiPro here.

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