Proven performance

Decalu, the aluminium window, door and curtain walling system, from Deceuninck. Easier to fabricate, easier to install. Industry leading through-life performance.

Innovation in aluminium window, door and curtain walling grounded on a core understanding of what manufacturers, installers, and the end user, want – and a commitment to deliver it.

Proven performance

Decalu, the aluminium window, door and curtain walling system, from Deceuninck. Easier to fabricate, easier to install. Industry leading through-life performance.

Innovation in aluminium window, door and curtain walling grounded on a core understanding of what manufacturers, installers, and the end user, want – and a commitment to deliver it.

The Decalu88 Flush Casement

Designed for & with
UK fabricators & installers.

The Decalu88 Flush Casement.

The future in the making.

Want to make and fit a better aluminium window and door range? You’re in the right place.

Deceuninck aluminium windows and doors
Deceuninck aluminium bi-fold doors

The Decalu88 Aluminium Bi-folding Door

Fit an extra bi-fold a day.

Fitted in under two-hours and glazed in less than four minutes*

*Three pane bifold

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We’re here to do things differently

Design from the ground-up

A product range developed with and designed for fabricators and installers

When we developed Decalu we knew that we wanted to shake things up. We went back to the drawing-board and redesigned our entire range from the ground-up.

We asked fabricators, installers, homeowners and specifiers what they wanted – and we made it.

Decalu is an energy efficient, easy to fabricate and easy to install aluminium window and door system.

Service innovation

A great product offer is no good if it’s not backed up by great service

We want to give you the best possible service. Aluminium supply has been hit and miss – that is until now. We’re committing to changing the way supply works, with an industry leading OTIF and extensive customer support.

How much extra do you pay for dual-colour, textured and marine grade finishes – our customers don’t.

Re-thinking window and door design

Decalu uses a single energy efficient mid-section, with integrated insulation and slim profiles.

Hover over the hotspots on the image to see it’s features.

General features:

decalu 88 standard

Accommodates IGUs of up to 71mm in depth

Knock-in glazing bead with pre-inserted gaskets

Modular - single inner frame with an identical mid-section

Integrated pre-inserted thermal insulation

Flush finish gasket. Maximises the glazed area

Optimised central closure

Keep up to date

Latest News

The Decalu 88 Flush Casement

Five products to make you money in 2024.

It’s time to shake off the festive period hangover and get back to making money. We’ve drawn up a list of our favourite Decalu products, each of which is designed to help you maximise sales. Nigel Headford, Director, Deceuninck Aluminium explains.

Still bouyant?

Offering a marine grade finish and dual colour as standard, we look at how Decalu is giving fabricators and installers a competitive edge in aluminium.