aWindow.

Supply & installation · London and surrounding areas

Genuine Crittall Windows & Doors

Slim steel frames bring daylight further into your home. Keep the character of a period façade, open a room to the garden, or let light pass between rooms.

Arched black glazed double doors with one leaf open beside a marble console
aWindow installationArched internal steel doors

Exterior casement windows

Keep the lines that give your home character.

Replace existing steel casements or design a new opening. Start with the proportions you want to see from the street and how you want the window to work inside.

Request a window estimate
Match the elevation
Use the existing pane pattern as a starting point. We can discuss how glazing bars should line up across neighbouring windows.
Plan how it opens
Decide which sections should open for ventilation, which can stay fixed and where you can comfortably reach the handles.

Interior & exterior doors

Give daylight room to travel.

Frame the view onto a terrace or separate a hallway, kitchen or study with a glazed steel door. Explore single, double and arched arrangements for your opening.

Request a door estimate
Between rooms
Choose clear glazing to keep a view through, or discuss obscured glass where you want more privacy.
Out to the garden
Think about which leaf you’ll open every day, whether you want both leaves to open, and whether glazed side panels would suit the width.

How we work

From first ideas to fitting.

You can start with a photo of what’s there now or a sketch of what you have in mind.

  1. Tell us what you’re planning

    Share your postcode, a few photos or drawings, and approximate sizes if you have them.

  2. Agree the details

    At survey we check the openings and confirm the layout, glazing and hardware before manufacture.

  3. Arrange installation

    We agree the fitting scope and talk through access and site preparation with you before work starts.