EcoBiblioteca project is using Magnesium Oxyde and PIR Structural Insulated Panles provided by Ozone Homes

March 27, 2012 at 12:00 pm | Posted in Certification, ecobiblioteca, Green Building Projects | Leave a comment
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As EcoBiblioteca project is pursuing the sustainable certification system Living Building Challenge, the renovated building of the library must reach a zero energy consumption level used for heating and cooling the indoor air. Therefore, having a highly thermal-efficient building envelope  is essential. But, in order to maintain the traditional look of the façade, the designers chose to clad it in horizontal wood planks. So, in order to support this additional weight, the insulated panels must also have rigid properties.

Most of the structural insulated panels (or shotly SIPs) are made as a sandwich of rigid OSB faces and polyisocyanurate  foam (PIR). But in order to achieve the Living Building Challenge’s Materials Petal, none of the elements used in the project can contain traces of the substances included in the list of forbidden construction materials  (Red List) that has been issued by the Living Future Institute. The fact that most of the wood – based products contain formaldehydes or other added flame retardant substances directed us to find alternative solutions.

The structural insulated panels acquired from Ozone Homes are of two kinds, judging by  the material used to support the faces of the sandwich. The middle is the same –PIR, having as prime matter locally harvested rapeseed oil – but the faces of the panel are made of Red List-friendly and FSC –certified OSB layers (the SIPs), respectively Magnesium Oxide sheets (the DIP panels).  The latter  material is fireproof, bu also water-resistant, which allows for it to be used both underground, for insulating the base and wet areas, and as false ceiling with insulating and fire-resisting properties. It looks similar to gypsum board, and supports both plaster-based finishes and screw-fixed solutions, so that the exterior finishing of the panel is opend to more than one options. In addition to these features, 65% of the product is recyclable, which makes it a truly green option.

So far, three facades have been clad in DIP panels.  The construction site of EcoBiblioteca has been re-opened this week, and amongst the first scheduled works are placing the structurally insulated panels  on the northern façade, but also starting to place the  interior ones, that act as flooring support and false ceiling mounted beneath the beams.

We’ll be back soon with construction site pictures.

Arch. Luiza Hanc, RoGBC

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