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.

Aluminum sliding door rollers are wheel mechanisms that facilitate the opening and closing of sliding doors. Typically made of durable materials like nylon or metal, these rollers glide along a track, allowing the door to move smoothly without much effort. The design of these rollers can vary significantly based on the type of door and its intended use, but their core function remains the same ensuring that the door slides effortlessly.


cast iron ball. These games involve throwing heavy metal balls towards a target, and the weight and density of cast iron make them perfect for this purpose. The smooth surface of the balls allows them to roll easily across the playing surface, while their solid construction ensures they will hold up to repeated use.


Conclusion
Depending on the aspect of their application, their cross-sectional shapes can vary. Generally speaking there are four main cross-sectional shapes of fixed window profiles: flat, round, unequal polygon and equal polygon. Among them, the plane type is commonly used in door frames, wall corner lines, etc.; round profiles are mainly used for aluminum alloy pipes; unequal polygons and equal polygons are commonly used for window frames, partitions, etc.
4. Door profile