Trade approved aluminium windows and doors

We thought it was time that an aluminium systems company listened to its customers

We’re here to listen, to learn and to build a product offer that helps our trade customers make more money by working smarter, not harder.

Decalu is based on extensive fabricator and installer research. We think it’s pretty good but we’re always working to be better based on what our customers tell us that they need. It’s a team effort and everyone benefits.


Decalu has been designed to maximise opportunities and margin for fabricators and installers.

This includes big wins in fabrication including lower stock holding, faster manufacturing times and a simple standardised colour offer.

Designed and developed to make installation easier, Decalu makes squaring and setting simpler, while our pioneering use of a pre-inserted co-extruded knock-in glazing bead, saves time on site and prevents call-backs for shrinkage.

Ultra-energy efficient with u-values as low as 0.68W/m2k, we’re also committed to redefining expectations of service in aluminium trade supply.

Deceuninck Products