An ideal choice for low-energy projects, whether simply replacing your windows or specifying your new home.
U value
from 0.79 W/m2K
Openings
Our french doors are available as inward or outward opening.
Airtightness
Class 4 airtightness with dual compression seals
Security
SBD high security option (PAS 24 and Part Q compliant)
French doors
Take a look at our French doors which are suitable for all project types from replacement right through to low energy retrofits and new build. Our French doors are available in both timber or Timber Aluclad, and can be inward or outward opening. We can modify the design to incorporate glazing and insulated panels to meet your project specific design.
Features of our French doors
Part M Compliant
Our doors come with a thermally broken part M compliant threshold as standard. Meeting the requirements for wheelchair access
Weather exposure
All of our products are third party tested to the highest levels of exposure.
FSC timber and aluminium cladding
All of our products use responsibly sourced FSC certified timber. Using a chain of custody we can track the timber
Triple glazed as standard
All of our products use triple glazed units with swiss spacer ultimate warm edge glazing spacers, argon filled cavities and lowE coatings.
Matching window ranges
All of our doors and windows are available in matching suites.
Technical data
Frame sections available in all formats, PDF, DWG and Revit. Backed up with PHPP ready data.
Secured by Design (SBD)
When it comes to security we go above and beyond. All ranges are tested to the SBD standard which uses live police data to combat against the latest break in trends.
Optional glazing bars
Glazing bars with duplex warm edge spacers are available on request.
Bespoke designs
We have some standard designs to give you some inspiration however all of our products are bespoke so we can work with you to achieve the door that best suits your style.
Discover our triple-glazed windows, available to make unique to you.







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
FAQs
-
Approved Document Q of the Building Regulations for England became mandatory for all new dwellings on 1 October 2016. This means that windows and doors in new dwellings, where Part Q is applicable, will need to be security tested to PAS 24, or equivalent standard.
-
Either a window or doorway, any part of which is within 2m vertically of an accessible level surface such as the ground or basement level, or an access balcony, or a window within 2m vertically of a flat or sloping roof (with a pitch of less than 30°) that is within 3.5m of ground level.
-
21 Degrees windows & doors are all made from timber. Our ranges are made from FSC® certified Redwood. Modern timber finishes are now so durable that, for most applications, we recommend them over aluminium cladding or UPVC.
-
U-Values measure how well heat is transferred by the entire window/ door – the frame, sash and glass – either into or out of the building. The lower the U-Value number, the better the window or door will keep heat inside a building on a cold day.

Download our french doors technical information
Download our technical drawings and UKCA declarations regarding our french doors.
Be inspired
See our french doors for our clients within our case studies.
Certified and quality tested
All of our products are thoroughly tested and quality assured.
FSC Certified Wood
Part Q Compliant

Secured by design
How can we help?

Visit our showrooms
Windows are a big investment, so come and visit our showrooms or catch us at exhibitions around the UK to see our products for yourself.

Request a quote
Tell us about your project, and we'll make sure you get a no-obligation quote from us. Take a step towards a more energy-efficient home today.

Get in touch
We offer a friendly and responsive aftersales service for our windows and door ranges, with a dedicated office and on-the-road aftercare team.