This is by far the biggest disadvantage of this type of window. Currently, aluminium window joinery is the most expensive on the market. This is, of course, due to its very good quality and reliability. Admittedly, we can also find cheaper solutions, but then we have to reckon with the fact that the thermal insulation parameters will be at a much lower level.
This die becomes shorter and wider until it can never expand anymore due to container wall restriction. That’s when the aluminum material starts forcing its way out through the die’s orifice and form a particular profile.

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cast iron panel. The rich texture and visual depth of cast iron can create a striking contrast with surrounding materials, adding visual interest and character to any design. Whether used as a focal point or a subtle accent, cast iron panels can enhance the overall look and feel of a space.
In essence, it is the natural finish the extruded aluminum profiles have the moment they emerge from the extruder die.
Appearance
In summary, window and door fittings are an essential aspect of home design that should not be overlooked. They contribute to the aesthetics, security, energy efficiency, functionality, and maintenance of our living spaces. Whether you are renovating your home or building a new one, it’s crucial to invest in high-quality window and door fittings that meet your personal style and practical needs. By doing so, you can create a safe, comfortable, and beautiful home that stands the test of time.