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Extension and refurbishment to Passive House Enerphit standard

An existing two storey farmhouse was refurbished to the passive house Enerphit standard while at the same time given a single storey extension. A passive raft slab was used in the construction of the extension and EPS insulation and Weber render was used on all walls. The existing roof slates were removed and the roof insulated and made airtight from the outside. A new Nibe air to water heat pump was installed to provide hot water and space heating through underfloor heating pipes.