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SNUG AS A BUG IN A RUG Robert Steininger about converting his former 1970s county council home

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What we started with 1970s county

council home 70m2 / 750

sqft Rated “G” 520

kWh/m2/yr

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What we started with No insulation old windows Central heating &

hot water: gas combi boiler

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The plan… Architect Extension 40m2 Deep retrofit A3/B1– New electrics– New heating– New windows– Insulation

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Insulation Pebble dash External wall

insulation, Weber K5 board, 100 mm

uPVC, double pane windows uw = 1.4W/m2K

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Insulation

Attic Mineral wool 300 mm,

cross threaded

Ventilation!

Before After

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Heating Combi Boiler Natural gas No hot water

storage tank Thermostats Day/Week timers

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Heating Controls 5 independent

Circuits Thermostat

controlled Day / week

timer

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Heat distribution Floor insulation

300 mm Partially for

existing Under floor

heating

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Heat distribution Aluminium Low volume High

efficiency Noisy

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Ventilation Passive uncontrolled Decentralized active

heat recovery ventilation

Negative impact on BER!

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The outcome

74 kWh/m2/yr.Annual Heating & Hot Water: €450

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The one that lost out … Open fire place 50% of fuel energy

lost through chimney 30% of room heat lostAlternatives: “closed” stoves

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