Klober air-open underlay tops performance ratings

Published:  11 January, 2017

The variable performance of vapour permeable underlays ultimately led to the decision by the NHBC and BSI that only air-open membranes can now be used without supporting high-level ventilation.

For roofs needing the highest ventilation performance, Klober Permo air offers not just an exceptional level of breathability, with a water vapour transmission sd-Value of 2736 g/m2/day, but a water vapour resistance which has been independently confirmed to be as low as 0.03 MNs/g.

Permo air has been used to upgrade countless historic buildings and to provide unparalleled performance during the critical drying out period on new builds.

For more information, visit www.klober.co.uk/shop/category/air-open-underlay.

Sign Up

For the Builders' Merchants News enewsletter.

In the spotlight

We have vacancies all over the UK for those who work within the Building Supplies sector.