We’ve changed, for the future. Green Building Store is now 21°
Green Building Store is now 21°
We want to enable you to achieve the best you can in the context of your objectives and resources. We offer our consultancy services to self-builders and their architects.
Discover our range of triple glazed windows, suitable for low energy and Passivhaus homes. We make home a healthier and more comfortable place to be.
Discover our range of inward and outward opening entrance, french, lift and slide doors and Lacuna® bi-fold doors, suitable for low energy and Passivhaus homes.
Harness the power of the sun with our high-efficiency solar panels. Save on energy costs, reduce your carbon footprint, and enjoy reliable, sustainable energy for your home or business.
These cutting-edge heating and cooling systems harness the stable ground temperature or take air from outside to deliver remarkably energy-efficient solutions for residential, commercial and industrial properties.
We're nationally recognised for our expertise in designing, supplying and commissioning MVHR systems for Passivhaus and low energy projects.
We've been supplying pioneering sustainable building products since 1995. Get to know us a little better and our range of specialist products and services.
Mill building office radical retrofit: Materials, Fittings and Furniture
Marsden Bungalow Radical Retrofit: Joining the Two Storeys Together
Mill Building Office Radical Retrofit: Heating & Ventilation
Masonry Cavity Wall Construction: Embodied Energy & Buildability
Preventing Overheating – Without the Need for ‘Active Cooling’
Marsden Bungalow Radical Retrofit: It’s a Wrap
Marsden Bungalow Radical Retrofit: The Timber Frame Roof
Marsden Bungalow Radical Retrofit: Timber Frame/ Masonry Hybrid
Can an MVHR system be used for cooling?
Holmfirth Farmhouse Radical Retrofit: Window Detailing
Efficient Building Solutions
Installing Windows in Energy Efficient Retrofits
