Aluminium Single Doors by Windows in the Lakes
Architectural Aluminium

Premium Aluminium Single Doors

Clean proportions. Slim aluminium frames. Designed around your home. A beautifully simple solution for side entrances, garden rooms, extensions and contemporary entranceways — surveyed and installed by our own teams across Cumbria and the Lake District.

5.0 from 7 Google reviews

Recent installations

Aluminium Single Doors we have designed, surveyed and installed

Slim anthracite aluminium single door to a stone and render extension — Aluminium Single Doors by Windows in the Lakes
Slim anthracite aluminium single door to a stone and render extension
Aluminium door and matching gable glazing on a contemporary elevation — Aluminium Single Doors by Windows in the Lakes
Aluminium door and matching gable glazing on a contemporary elevation
Run of aluminium windows and side door to a brick extension — Aluminium Single Doors by Windows in the Lakes
Run of aluminium windows and side door to a brick extension
Aluminium glazing to a clad garden room — Aluminium Single Doors by Windows in the Lakes
Aluminium glazing to a clad garden room
Aluminium windows and doors specified together across one elevation — Aluminium Single Doors by Windows in the Lakes
Aluminium windows and doors specified together across one elevation
Aluminium glazing set into traditional Cumbrian masonry — Aluminium Single Doors by Windows in the Lakes
Aluminium glazing set into traditional Cumbrian masonry

Why this system exists

01

Slim sightlines, more daylight

A narrow aluminium frame around a single large pane gives a side or garden door the same architectural discipline as the rest of the elevation.

02

Strong and durable

Aluminium carries large glass areas on a slender frame and holds its geometry through Cumbrian winters without swelling, warping or dropping.

03

Low maintenance

Powder-coated frames need washing down, not repainting — an honest advantage on an exposed rural elevation.

04

Security taken seriously

Multipoint locking as standard, with PAS 24 tested configurations and laminated glass available. Specification varies depending on system and configuration.

05

Thermally broken frames

Polyamide thermal breaks and modern sealed units keep a rear or side door comfortable rather than draughty. Final figures are confirmed against the chosen system at quotation.

06

Made to measure, properly fitted

Every door is made to the surveyed opening and installed by our own teams — no packing out a stock size and hoping the reveal forgives it.

A simpler aluminium door

Not every opening needs a bifold or a large sliding system. Where the brief is one well-proportioned door onto a garden, a terrace or a utility yard, a single aluminium door does the job with less hardware, less cost and a quieter elevation.

It suits side doors, garden doors, utility entrances, extension entrances, glazed rear doors, home offices, garden rooms and contemporary secondary entrances — anywhere a full-height pane of glass is worth more than a solid leaf.

The same family as our aluminium bifolds

Selected configurations can be created from the same aluminium door platform used across our bifolding door systems. In practice that means a single door, a French pair and a folding set can share frame depth, sightline and hardware across one extension.

It is the difference between three doors that happen to be aluminium and one coherent piece of architecture. Where a configuration sits outside that platform we will say so rather than imply a match that does not exist.

Design options

Fully glazed — maximum natural light and clean architectural simplicity. Part glazed — glazing above, a solid section below, where privacy or a working entrance calls for it.

Side panel configurations add fixed glazed panels where the structural opening is wider or the room needs more daylight. Open-in or open-out configurations are available depending on the layout of the property and how the space around the door is used.

Colours

Aluminium doors are specified in polyester powder-coated finishes. Anthracite grey and black remain the two most requested architectural colours in Cumbria, with a wider palette of contemporary greys and neutrals behind them, and bespoke RAL colours available on many systems.

Dual colour — one finish outside, another inside — is frequently the detail that makes a door disappear against a plastered reveal. Colour availability is confirmed against the final supplier specification before order.

One complete aluminium glazing package

Most of our work is not a single door. It is an extension, a renovation or a whole house where aluminium windows, single doors, French doors, bifolds, slim sliding doors and fixed glazing are specified together and installed as one programme.

Coordinate your aluminium windows, French doors and sliding systems across one complete extension and the elevation reads as a composition rather than a series of purchases.

Aluminium Single Doors installed in a Cumbrian home

Considered detailing is what separates a fitted window from a finished one.

Recent installs

Recently completed across Cumbria and the North West

Real installations from across Cumbria and the North West — surveyed, specified and installed under our own supervision.

Alunet Aluminium Picture Windows, Eco Forest Lodges, installed in Ravenstonedale, 2026

Alunet Aluminium Picture Windows, Eco Forest Lodges

Ravenstonedale · 2026

Alunet Aluminium French Door Sets, Eco Forest Lodges, installed in Ravenstonedale, 2026

Alunet Aluminium French Door Sets, Eco Forest Lodges

Ravenstonedale · 2026

Glazed Rear Elevation, Heritage Aluminium Windows, installed in Near Penrith, 2025

Glazed Rear Elevation, Heritage Aluminium Windows

Near Penrith · 2025

24 Heritage Aluminium Windows, Matt Black, installed in Near Penrith, 2025

24 Heritage Aluminium Windows, Matt Black

Near Penrith · 2025

Garden Room Glazed on Three Sides, Jet Black Bifolds, installed in Near Keswick, 2025

Garden Room Glazed on Three Sides, Jet Black Bifolds

Near Keswick · 2025

Four-Panel Aluminium Bifold Run, installed in Near Keswick, 2025

Four-Panel Aluminium Bifold Run

Near Keswick · 2025

Aluminium French Door Sets In Original Brick Arches, installed in Near Cartmel, 2025

Aluminium French Door Sets In Original Brick Arches

Near Cartmel · 2025

Timber-Look uPVC Windows, Barn Conversion, installed in Near Cartmel, 2025

Timber-Look uPVC Windows, Barn Conversion

Near Cartmel · 2025

Steel-Look Georgian-Bar Casements & Bay Windows, installed in Near Windermere, 2025

Steel-Look Georgian-Bar Casements & Bay Windows

Near Windermere · 2025

Full-Width Garden Room Glazing & Lantern Rooflight, installed in Near Windermere, 2025

Full-Width Garden Room Glazing & Lantern Rooflight

Near Windermere · 2025

Full-Width Slimline Sliding Doors, Clad Remodel, installed in North West, 2025

Full-Width Slimline Sliding Doors, Clad Remodel

North West · 2025

Black Aluminium Picture Windows, Timber-Clad Elevation, installed in North West, 2025

Black Aluminium Picture Windows, Timber-Clad Elevation

North West · 2025

32 Heritage Windows and 4 Doors, Stone Self Build, installed in West Yorkshire, 2025

32 Heritage Windows and 4 Doors, Stone Self Build

West Yorkshire · 2025

Black Heritage Windows with Georgian Bars, installed in West Yorkshire, 2025

Black Heritage Windows with Georgian Bars

West Yorkshire · 2025

Triangular Gable Glazing and Heritage Casements, installed in West Yorkshire, 2025

Triangular Gable Glazing and Heritage Casements

West Yorkshire · 2025

Steel-Look Doors and Screens, Barn Conversion, installed in North West, July 2026

Steel-Look Doors and Screens, Barn Conversion

North West · July 2026

Flush Casement Windows, Oak-Framed Garden Room, installed in Cumbria, July 2026

Flush Casement Windows, Oak-Framed Garden Room

Cumbria · July 2026

Grey Aluminium Windows and Doors, Full Elevation, installed in North West, July 2026

Grey Aluminium Windows and Doors, Full Elevation

North West · July 2026

Steel-Look French Doors and Window Set, installed in North West, June 2026

Steel-Look French Doors and Window Set

North West · June 2026

Anthracite Bifolding Doors, Brick Extension, installed in North West, July 2026

Anthracite Bifolding Doors, Brick Extension

North West · July 2026

Steel-Look Screen and Doors, installed in North West, July 2026

Steel-Look Screen and Doors

North West · July 2026

Three-Panel Slimline Sliding Doors, installed in North West, July 2026

Three-Panel Slimline Sliding Doors

North West · July 2026

Five-Panel Bifolding Doors, Cottage Extension, installed in Cumbria, June 2026

Five-Panel Bifolding Doors, Cottage Extension

Cumbria · June 2026

Steel-Look Doors and Matching Screen, installed in North West, June 2026

Steel-Look Doors and Matching Screen

North West · June 2026

Slimline Sliding Doors, Brick Courtyard, installed in North West, June 2026

Slimline Sliding Doors, Brick Courtyard

North West · June 2026

Full-Width Steel-Look Glazed Screen, installed in North West, June 2026

Full-Width Steel-Look Glazed Screen

North West · June 2026

Heritage French Doors with Side Screens, installed in North West, May 2026

Heritage French Doors with Side Screens

North West · May 2026

Aluminium Windows and Glazed Doors, installed in North West, May 2026

Aluminium Windows and Glazed Doors

North West · May 2026

Bifolding Doors to a Barn Courtyard, installed in Cumbria, May 2026

Bifolding Doors to a Barn Courtyard

Cumbria · May 2026

Gable-End Glazing and French Doors, installed in North West, May 2026

Gable-End Glazing and French Doors

North West · May 2026

Internal Steel-Look Screen, installed in Cumbria, April 2026

Internal Steel-Look Screen

Cumbria · April 2026

Bifolding Doors, Clad Garden Room, installed in Cumbria, April 2026

Bifolding Doors, Clad Garden Room

Cumbria · April 2026

Aluminium Vertical Sliding Sash Windows, installed in Cumbria, March 2026

Aluminium Vertical Sliding Sash Windows

Cumbria · March 2026

Slim 20mm Sliding Door Set, installed in Windermere, May 2026

Slim 20mm Sliding Door Set

Windermere · May 2026

Heritage French Door Set, installed in Barrow, May 2026

Heritage French Door Set

Barrow · May 2026

Single Door and Window, installed in Windermere, May 2026

Single Door and Window

Windermere · May 2026

AB60 Smart French Doors, installed in Bowness, May 2026

AB60 Smart French Doors

Bowness · May 2026

Heritage Alunet Bifold Doors, installed in Lancaster, May 2026

Heritage Alunet Bifold Doors

Lancaster · May 2026

AS20 Smart Slimline Sliding Doors, installed in Carlisle, January 2026

AS20 Smart Slimline Sliding Doors

Carlisle · January 2026

Farmhouse Extension Aluminium Windows, installed in Carlisle, January 2026

Farmhouse Extension Aluminium Windows

Carlisle · January 2026

Full House Aluminium Windows, installed in Kirkby Stephen, August 2025

Full House Aluminium Windows

Kirkby Stephen · August 2025

Technical

Specification at a glance

Final performance figures depend on configuration, glass make-up and installation detail. Full data sheets are issued with every quotation.

System
FrameX aluminium door platform, including the Aluna range
Configurations
Single swing, open-in or open-out, with optional fixed glazed side panels
Glazing
Fully glazed or part glazed; double or triple glazed units
Thresholds
Low-line or weathered — specification varies depending on system and configuration
Finish
Polyester powder coated, architectural and RAL colours, dual colour available
Security
Multipoint locking; PAS 24 tested configurations available
Service
Measured survey, supply and installation across Cumbria and the Lake District

Specify it your way

Colours, glass, hardware and details worth saving

Save anything that appeals and it travels with you — into your Inspiration Collection and then into your consultation.

Frame colours

  • RAL 7016 AnthraciteThe contemporary default — quiet against stone and render alike.
  • Jet BlackSteel-look elevations and rural conversions.
  • Painted CreamTraditional joinery language for cottages and farmhouses.
  • Heritage GreenA soft period colour that settles into landscape.

Glass & glazing

  • Slim 20mm sliding sightlinesMaximum glass, minimum frame, panes that stack behind one another.
  • Steel-look divided lightsAstragal bars and fine profiles echoing original metal windows.
  • Flush casementsSashes sitting level with the frame, as painted joinery would.

Hardware

  • Monkey-tail handlesForged period detailing for heritage and conservation openings.
  • Flush lever handlesMinimal, colour-matched and unobtrusive on modern frames.
  • Brushed bronze ironmongeryWarm metal against dark frames — the detail people touch.

Design features

  • Slim sightlines, more daylight

    A narrow aluminium frame around a single large pane gives a side or garden door the same architectural discipline as the rest of the elevation.

  • Strong and durable

    Aluminium carries large glass areas on a slender frame and holds its geometry through Cumbrian winters without swelling, warping or dropping.

  • Low maintenance

    Powder-coated frames need washing down, not repainting — an honest advantage on an exposed rural elevation.

  • Security taken seriously

    Multipoint locking as standard, with PAS 24 tested configurations and laminated glass available. Specification varies depending on system and configuration.

Start the conversation

If you are planning an extension, renovation or new-build project and want glazing designed and installed without compromise, we would be glad to talk.

Approximate sizes are fine at this stage. Most homeowners simply send drawings or photos of their openings.

Direct

01768 254554projects@windowsinthelakes.co.uk

Based in Appleby-in-Westmorland, with installation teams across Penrith, Keswick, Kendal, Windermere and the South Lakes.

Common questions

Aluminium Single Doors: your questions answered

Practical answers to what homeowners ask us most about this system. Anything else, just ask.

Ask Us DirectlyVisit the Knowledge Centre

Not sure if this would suit your home?

Share a photograph and we’ll show you how this collection works on properties like yours.

Discover Your Home

Wondering what this collection typically costs?

Plan your project investment with a guide based on comparable completed projects.

Plan Your Project Investment

Designed with

Frequently paired with this collection.

Begin

Let’s design something exceptional.

Bring us your drawings, your site photographs or simply an idea. We will tell you what is possible, what it should cost and how long it will take.