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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.

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Windows

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.

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Doors

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.

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Solar panels

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.

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Heat pumps

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.

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MVHR

We're nationally recognised for our expertise in designing, supplying and commissioning MVHR systems for Passivhaus and low energy projects.

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Units

About us

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.

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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 all services

Services

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 windows

Options

Range

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.

Discover our doors

Options

Range

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.

Discover our solar panels

Range

Discover our heat pumps

Range

We're nationally recognised for our expertise in designing, supplying and commissioning MVHR systems for Passivhaus and low energy projects.

Discover MVHR

Options

Units

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.

Find out more

Discover

Technical Resource | 11 Mar 2024

Lacuna Bi-fold Doors

Download all the files you need including PDF files, installation instructions and brochures for Lacuna® bi-fold doors.

Lacuna door sections

Download PDF

Lacuna door sections

Download DWG

Information sheet

Download PDF

Installation instructions

Download PDF

Are you an architect?

More technical resources

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technical resource

Entrance Doors Technical Information

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Windows GBS-98A Technical Information

technical resource

Windows & Doors Technical Information

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T: 01484 461705 E: info@21degrees.com

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21° is a trading name of Environmental Construction Products Ltd. Registered Office: 85 Great Portland Street, London, W1W 7LT. We are an Efficient Building Solutions business. VAT registration number: 640 7097 42. Company registration: Cardiff 3359943

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