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We use the external breathable membrane ‘KangDa’, which in contrast to other available wall and roof underlays has the ability to keep constructions permanently dry and protected from structural damage due to its high performance moisture management properties.

While being highly resistant to wind and water penetration from the outside Kangda breathable membrane is highly “diffusion open” on the inside giving it the ability to freely transport moisture from within the inner wall or roof cavity to the outside. This effectively prevents the mould and subsequent structural damage that can result when moisture becomes trapped during construction, and over time, from driving rain and internally driven dampness caused by condensation when humidity levels are high. Adding to the risk of structural decay is the wall and roof insulation which also becomes damp as a result of trapped moisture.