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Construction system
Morob Frame

Component id: 1041cs03
Manufacturer: Moffitt & Robinson Ltd.
Category: Construction 
Construction type: Light 
Window: Analysis was undertaken using a generic, passive house-standard timber-framed, triple-glazed window unit, featuring phA thermal values for the spacer. For the roof windows, a VELUX GGU-008230 window was used, which features a TGI spacer. PIR Insulation (Ballythermm, 0,022 W/(mK)) is used at the window installations. The calculations undertaken demonstrate that the window installation locations are suited to the cool-temperate climate zone, with no risk of surface condensation. 
Airtightness: The airtightness of the construction system is achieved through the use of a certified airtight OSB product (e.g. Smartply Propassiv) within the external walls, and an airtight membrane in the roof and floor build-ups. Connections are taped using specialist air tightness tape. 
Illustration: The Passive House Institute has defined international component criteria for seven climate zones based on hygiene-, comfort- and affordability criteria. In principle, components which have been certified for climate zones with higher requirements may also be used in climates with less stringent requirements. This use might make sense in certain circumstances. 
Climate zones: Cool, temperate
Remark: Morob is a lightweight timber-frame construction system. The external walls comprise timber studs and mineral wool (ISOVER Metac, 0.034 W/(mK), Rockwool Roll, 0.044 W/(mK)). The walls are designed to be used with a ventilated rainscreen to the exterior, for which additional point thermal bridges may need to be taken into account in the PHPP. Two roof options are included, pitched and cold roof, both comprising 'open' timber beams and solid beams with mineral wool (Rockwool Roll, 0.044 W/(mK)). The floor comprises poured concrete, PIR insulation (Quinn Therm QF, 0.022 W/(mK)) and cement screed. The system has undergone analysis by the Passive House Institute against the thermal performance criteria for cool-temperate climate zones and has been deemed suitable for the construction of passive houses in both this and and warm-temperate climates.

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