Tethera
Aerial view courtesy Lunar AI
Replacement of an existing worn out bungalow in the Lake District with a new build Passivhaus holiday home.
Existing:
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Stunning location on north shore of Ullswater with view across lake to Hallin Fell.
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Existing bungalow built in late 1950s as staff accommodation for Outward Bound Centre; no architectural merit, modular build, no insulation, cold and damp.
Brief:
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New home to have three bedrooms, oriented to take advantage of views.
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Simple form, highly energy efficient, low maintenance, robust.
Planning:
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Located in World Heritage Site of National Park.
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Replacement build to have similar footprint form and materials as existing property.
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Full permission granted August 2020.
Proposals:
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New home to have three bedrooms, oriented to take advantage of views.
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Exceptional location and lake views have driven design concept.
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Simple rectangular, pitched roof form sits comfortably in the context.
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Improved accessibility by lowering internal floor level has allowed sufficient height for additional mezzanine floor at one end.
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Designed to certifiable Passivhaus Classic standard.
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Triple glazed windows and doors; quad glazed rooflights; larger windows on south and west elevations to maximise winter heat gain.
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Entirely timber frame, built as pre-fabricated and insulated panels in local factory.
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Roof and wall U-value 0.090W/m2K.
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Isoquick insulated raft and 60/40 concrete slab U-value 0.10W/m2K.
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Integrated in-roof PV panels powering Givergy battery storage, Mixergy dhw cylinder, radiant heating panels, Myenergi EV charge point.
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Full mechanical ventilation with heat recovery (MVHR).
Progress:
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Demolition and site clearance started in January 2021.
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Isoquick insulation installed in half a day.
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Concrete poured February 2021.
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Timber frame panels erected, windows installed, first fix started March 2021.
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Intermediate airtightness test achieved n50 of 0.14 ach/h in April 2021 with all penetrations complete.
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First fix and plasterboard completed by mid May. External render carrier boards, roof slating and PV panels mostly complete by mid May.
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June: plastering, decorations, tiling and kitchen installed.
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July: Final airtightness test confirmed n50 of 0.14 ach/h.
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August: 95% complete internally, external works in progress.
Existing bungalow
Oops
Ground floor plan
First floor plan
Isoquick installation 10am
Isoquick installation 2pm
Ready for concrete.
Concrete. 40% GGBS replacement
Frame panels from Eden Insulation
That view
Frame panels took a day and a half to erect and make weathertight
View from A592
Hidden gutters span end to end
1st fix complete, ready for plasterboard
Craftsman at work
Much as though we liked the green Smartply Propassiv OSB, we prefer the plasterboard
Stone walled
Plastered
Sunrise
