Dome-shaped passive solar homes combine architectural innovation with sustainable design. Their curved geometry reduces surface area, improving heat retention, while passive solar design principles maximise sunlight capture in winter and minimise overheating in summer.
Although these homes perform exceptionally well in real life, they present unique challenges when assessed for an Energy Performance Certificate (EPC).
Why Dome-Shaped Homes Perform Differently
Reduced heat loss: A dome has less external surface area than a traditional box-shaped home of the same volume, lowering conductive heat loss.
Natural wind deflection: The curved surface reduces wind pressure, minimising air infiltration.
Optimised daylight: Passive solar orientation allows strategic window placement for maximum winter heat gain and summer shading.
EPC Modelling Limitations
Standard EPC software is built for rectangular building geometry and assumes conventional wall, roof, and floor layouts. Dome-shaped designs cause challenges such as:
Inaccurate surface area calculations: The geometry may be forced into a “box model” approximation.
Non-standard glazing orientation: Passive solar window arrangements may be oversimplified.
Thermal mass treatment: EPC models may not fully capture the stabilising effect of the dome’s integrated mass.
Learn more about our experience with unconventional and sustainable architecture on our About Us page.
Residential EPC for Dome Homes
Owners of dome-shaped passive solar homes may find that their EPC ratings understate actual performance. Our Residential EPC service ensures your home’s unique features are clearly documented for buyers, tenants, or planning purposes.
Same-Day EPC for Specialist Properties
If you need quick certification for your dome-shaped home, our Same Day Energy Performance Certificate (EPC) service is designed for fast yet accurate assessments.
Cost Implications
Non-standard buildings may require extra site measurement time during EPC inspections. For a breakdown of service costs, see our Pricing Plan page.
Expert Advice
Want to know how your dome-shaped passive solar home will be handled in EPC modelling? Contact our team via the Contact Us page.
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