Wimland Farm

Situated on a 180-acre arable farm in West Sussex, this highly energy-efficient private house utilised cost effective construction and materials throughout, achieving energy reduction normally associated with a Code for Sustainable Homes Level 6 property.

The project included the upgrading of all the existing farm outbuildings to create a purpose built grain store and a new smaller, more sustainable home, as the original Grade II listed farmhouse was too large for their requirements.

The house is designed as an open courtyard with a two-storey living/guest accommodation and single-storey sleeping wing which has been further extended into the landscape to protect the external spaces and the southern elevation from the direction of the prevailing wind.

The superstructure was constructed using a SIP system further enhanced to achieve a uniform U Value of 0.1 throughout, with a simple rain screen of Grade A+ Fibre cement tiles to walls and roof.

This ensured high levels of air tightness and insulation to the fabric, together with a simple strategy to minimise thermal bridges. Heating and hot water is provided by a ground source heat pump located within the field, integrated with a whole house ventilation system supplied by a Nilan VP18 unit. Air is collected from bathroom and kitchen spaces, as well as the double height dining space, to recycle heat within the system.

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