We manufacture aluminium systems for window and door joinery and façades. Since 2008, first under the brand name Blyweert Aluminium and since 2018 as So Easy System Sp. z o.o., we have been creating So Easy aluminium technology solutions under the DECALU brand. We are part of the Deceuninck Group. We support door and window manufacturers by supplying aluminium systems to shorten and simplify the production process. “DECALU high-five” is: five elements that distinguish DECALU structures made with So Easy technology: - seals integrated in the profiles - unique design and slimness - hidden hinges - invisible drainage - unique central plastic five distinctive features of DECALU aluminium window and door systems: - easy and quick prefabrication - timeless design - energy efficiency - reduced number of components required for production - quick installation