By focussing on an energ y-efficient desig n, renewable technolog ies and natural materials, you can reduce your home’s overall environmental impact while enhancing its sustainablit y credentials

1 This Passivhaus was built using natural materials, quality insulation and high-spec glazing from Norrsken (norrsken.co.uk).

DUG WILDERS

In an era where we’re more conscious of environmental challenges, building a property that has been created with sustainability in mind is a priority for many. Eco homes come in many guises; they can be created with natural materials, specify renewable tech or have high thermal efficiency. Building an eco home may seem like a significant investment, but in reality, the long-term benefits outweigh the costs. Energy-efficient systems lower utility bills, while sustainable materials often have greater durability and require less maintenance.

The materials used in a home build are crucial to its sustainability. Prioritising natural, renewable, recycled or locally sourced products reduces the embodied energy needed for manufacture and transport. Reclaimed items such as bricks or tiles minimise waste while adding character; and renewable materials, like FSC-certified timber or bamboo, provide a low-carbon footprint.

Addressing heat loss is a cornerstone of eco home design. High-quality insulation, is a crucial first step, and could be achieved with natural materials, such as sheep’s wool. Equally important is airtight construction, which prevents drafts and minimises energy loss by sealing gaps around doors, windows etc. Incorporating passive solar design, pairing large south-facing glazing with thermally massive products, will maximise natural light and heat.

Integrating renewable energy is popular among self builders, reducing reliance on fossil fuels, such as gas or oil. Solar panels, including PV units for electricity and thermal panels for hot water, are common. Heat pumps are another option for well-insulated homes, with ground source heat pumps offering high efficiency but requiring significant investment, while air source heat pumps are more affordable and easier to install in most properties.

2 Designed by Greenheart (greenheartuk.com), this project in Somerset saw a previouslyconverted cowshed extended in timber frame, with Warmcel recycled cellulose insulation, high-performance windows, a heat pump and MVHR.