Making a home extension more sustainable
An extension is a chance to improve comfort and reduce energy demand, not just add floor area.
Sustainable choices work best when they are integrated into the design from the start.
Insulation, airtightness, glazing, heating and materials all influence the result.
Build the shell well
A well-insulated, airtight shell is the foundation of an efficient extension.
Thermal bridges around steel, thresholds and roof edges need careful detailing.
Choose systems that fit
Underfloor heating, low-temperature systems and heat pumps work well when the insulation level is high.
Ventilation should be designed so comfort and air quality stay balanced.
Material choices
Timber frame, recycled materials, sedum roofs and durable finishes can reduce impact.
The most sustainable choice is also one that lasts and is easy to maintain.
Summary
Sustainability is strongest when shell, systems and materials are treated as one design.
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