At 21°, we believe you thrive in the places where you experience comfort. Discover our range of doors, suitable for low energy and Passivhaus homes. We improve the very fabric of your building, making it energy efficient and a healthier and more comfortable place to be.
Doors
We believe you thrive in the places where you experience comfort. Discover our range of high performance doors, suitable for low energy and Passivhaus homes.
Our doors
Comfort matters
Our door range
Our door configurations are perfect for low energy and Passivhaus projects. All configurations have secured by design and Part Q compliant options with good thermal performance and airtightness.
Certified and quality tested
All of our products are thoroughly tested and quality assured.
FSC Certified Wood
Part Q Complient
Secured by design
Make your doors unique to you
How do triple-glazed doors work?
Each layer of glass is separated by sealed gaps of Argon. These gaps act as insulation that keeps your home warm in the winter and cool in the summer.
Low U values
Argon-filled triple glazing as standard for comfort and great thermal performance
Airtightness
Dual compression seals ensuring long-term class 4 airtightness
High security
Multipoint locking tested to Secure by Design standard
As well as looking great, 21°'s windows and doors offer excellent thermal and airtightness performance, which was obviously very important for us in working towards a Passivhaus self-build.
Polly Upton & Kirk Rushby - Clients
FAQs
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Please contact us for advice on the best range for your project.
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Yes, we do! Our fitting service operates throughout the UK.
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21° doors have the option to be Secured by Design compliant, please specify this when requesting a quote with us.
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Yes, we can include cat-flaps in fully glazed doors. Please note that the cat flap would be at least 300mm from floor level. Our doors all achieve the highest level of airtightness at Class 4, but adding a cat flap would obviously affect this. Cat flaps are not advised for Passivhaus builds unless you use a specialist Passivhaus-suitable cat-flap, which we can advise on.
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Yes, we supply PHPP data on our windows and doors for those needing the information for Passivhaus projects. You can download our PHPP10 file on our technical page.
News & inspiration hub
Webinars, interviews, technical guides, news, case studies and more.
How can we help?
Visit the showrooms
Doors are a big investment, so come and visit our showrooms in Huddersfield and Swindon or catch us at exhibitions around the UK to see our products for yourself.
