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One of the biggest issues in residential housing is moisture management. As people use more water in their daily lives in terms of cooking, washing, showering and clothes drying, they generate more moisture in homes, resulting in ever-increasing levels of condensation and humidity on walls and external joinery during winter.

Wienerberger Porotherm clay construction blocks by Stellaria NZ are a perfect solution to this problem. This fully breathable external and internal clay construction block has been developed not only for strength, thermal performance and durability but also as a fully breathable hygrometric regulator (i.e the block regulates both the humidity in the airspace, as well as allows air movement at a microscopic level through the walls).

One of the biggest issues in residential housing is moisture management. As people use more water in their daily lives in terms of cooking, washing, showering and clothes drying, they generate more moisture in homes, resulting in ever-increasing levels of condensation and humidity on walls and external joinery during winter.

Wienerberger Porotherm clay construction blocks by Stellaria NZ are a perfect solution to this problem. This fully breathable external and internal clay construction block has been developed not only for strength, thermal performance and durability but also as a fully breathable hygrometric regulator (i.e the block regulates both the humidity in the airspace, as well as allows air movement at a microscopic level through the walls).

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In many of Porotherm builds, block walls are coupled with Internorm triple glazed joinery which guarantees no condensation on the joinery, no moisture build-up and no mould or stale air. As with many joinery systems, passive ventilators within the frame of the joinery are another way to minimise moisture build up and maintain a higher air quality.

In many of Porotherm builds, block walls are coupled with Internorm triple glazed joinery which guarantees no condensation on the joinery, no moisture build-up and no mould or stale air. As with many joinery systems, passive ventilators within the frame of the joinery are another way to minimise moisture build up and maintain a higher air quality.

With Porotherm clay block walls being a monolithic structural walling system (consisting of just one wall construction material, with no built-up walling systems, insulation batts or wall cavities), there is also no build-up of mildew or mould within the wall structure itself.

With Porotherm clay block walls being a monolithic structural walling system (consisting of just one wall construction material, with no built-up walling systems, insulation batts or wall cavities), there is also no build-up of mildew or mould within the wall structure itself.

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The external and internal wall finishes are all mineral and lime based fully breathable solid plaster systems. Lime paints and plasters absorb internal air and C02 and remove toxins by releasing oxygen into the air, thereby producing a much higher indoor air quality. Lime paints and plasters can be manufactured to be applied the same as more standard acrylic or oil-based paints, with the lime binding to all surfaces without the use of synthetic bonding agents.

With lime as a key wall finishing element, the air is constantly being cleaned. With the matrix design and porosity of the clay blocks, the permeability ensures constant air changes.

The Porotherm clay block range has thermal R-values of R1.71 through to R5.4 as stand-alone building elements. In general terms, it takes around 12 hours for the heat or cool to pass through the thickness of the wall, so as a consequence of this it is far easier to maintain an even temperature (22-26 degrees) within the home. This together with the ability of the block to hold and release moisture comes the ability to more easily manage humidity levels. If the air is too dry air this can cause skin to crack and become irritated more easily. It will also dry out the airways. International Occupational Safety and Health Administrations recommend indoor air be maintained at 20-24.5°C with a 20-60% relative humidity. This is easily achievable with Porotherm clay block.

The external and internal wall finishes are all mineral and lime based fully breathable solid plaster systems. Lime paints and plasters absorb internal air and C02 and remove toxins by releasing oxygen into the air, thereby producing a much higher indoor air quality. Lime paints and plasters can be manufactured to be applied the same as more standard acrylic or oil-based paints, with the lime binding to all surfaces without the use of synthetic bonding agents.

With lime as a key wall finishing element, the air is constantly being cleaned. With the matrix design and porosity of the clay blocks, the permeability ensures constant air changes.

The Porotherm clay block range has thermal R-values of R1.71 through to R5.4 as stand-alone building elements. In general terms, it takes around 12 hours for the heat or cool to pass through the thickness of the wall, so as a consequence of this it is far easier to maintain an even temperature (22-26 degrees) within the home. This together with the ability of the block to hold and release moisture comes the ability to more easily manage humidity levels. If the air is too dry air this can cause skin to crack and become irritated more easily. It will also dry out the airways. International Occupational Safety and Health Administrations recommend indoor air be maintained at 20-24.5°C with a 20-60% relative humidity. This is easily achievable with Porotherm clay block.

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