email: . tel: 00 44 (0)1481 200388


Cheyne Walk

Cheyne Walk an ongoing project in which E-Si are responsible for all aspects of an extension build.

Our role is:

Project manage the entire build.

Oversee all architectual and building control design specifications and permissions and responsible for all sub contractors.

Implement Renewable Energy installation and all aspects of hydronics and electrics.

Once completed E-Si will also of been responsible for the install of:

2x Ecodan Air Source Heat Pumps by Mitsubishi integrated with existing Solar Water Heating which will heat house Central Heating, Hot Water and Swimming Pool.

100mm Rockwool Cavity Wall Insulation.

Underfloor Heating.

Multi-zone controls.

100mm floor insulation.

All Lighting and Electrical Fittings.

100mm roof insulation with Alkorbright roof covering membrane reflecting light for summer efficiency keeping house cool.


Visit the installation pages documenting each stage of works.

Demolition & Groundworks


Building walls



Windows & Doors

Multi-zone controls

Air Source Heat Pump install

Under Floor Heating


Guernsey Granite - Contracted Eco-builders

Guernsey Glass - Windows and Glass

Ice Energy - Air Source Heat Pumps

Warmworld - Heating controls

Craig Anderson, Chief Renewable Energy Engineer, Project Manager for Cheyne Walk. Email: Mobile: 07781 137 362