In recent months, the Premier Guarantee Technical Standards team have been conducting in-depth research into the use and performance of MgO boards, following some potential systemic failures in Denmark.
When subjected to high levels of humidity, the boards are prone to leaching chloride, which can have an effect on fixings and the internal environment within the building. The true impact of this issue within the UK is not yet known, however we are aware that these boards are used on a number of our developments.
The Premier Guarantee Technical Standards team have consulted on this issue with the NHBC, Kiwa BDA, BBA and MOBBTA, a trade association for magnesium board manufacturers.
From these meetings we have realised that there are some inconsistencies in the testing of building products and that there are limiting test requirements that confirm that the board will not leach. As a result, it has been agreed that, at present, these boards may only be used where all the following conditions apply:
At this time, the above applies to MgO boards that contain either Chloride or Sulphate free ions.
BBA and Kiwa BDA have informed us that, at present, the only MgO boards that are available with third party certification are the Resistant MgO Board and the Euroform MgO Board.
Our investigations remain ongoing and we will keep you updated as new information becomes available.
Please email email@example.com with any issues, queries or concerns you may have with the above information.