Moisture damage with magnesium oxide boards in Danish facade structures | Zendy

Carsten Rode | Zendy; Tommy Bunch-Nielsen | Zendy; Kurt Kielsgaard Hansen | Zendy; Bent Grelk | Zendy

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Moisture damage with magnesium oxide boards in Danish facade structures

Author(s) -

Carsten Rode,

Tommy Bunch-Nielsen,

Kurt Kielsgaard Hansen,

Bent Grelk

Publication year - 2017

Publication title -

energy procedia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.474

H-Index - 81

ISSN - 1876-6102

DOI - 10.1016/j.egypro.2017.10.025

Subject(s) - moisture , facade , magnesium , oxide , humidity , materials science , composite material , environmental science , metallurgy , structural engineering , engineering , meteorology , physics

Magnesium oxide boards have been widely used on facades in Denmark during 2010-2015. However, the magnesium salts absorb humidity from the ambient, and they begin to leak salty water, which is highly corrosive, and leads to moisture and mould problems in wooden members of the structures. MgO-boards were not tested for their hygrothermal function before being used on exterior wall structures, which has had detrimental consequences, such as an expected cost of repair of around 2 billion DKK. Properties for moisture transport and retention properties have been determined and will be shown together with some examples of damaged structures.

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