Aluminium doors and windows are made from extrusions. The extrusions are manufactured from either prime or recycled aluminium billets and can be finished by anodising or painting. The extrusion process is a method by where the aluminium is heated and forced through an extrusion die that has the shape of the profile machined into it. Aluminium is one of the most recyclable construction products in use today and is also used in the manufacture of vehicles due to its strength and light weight.
Extrusions used in windows and doors have gone through some major developments in the last few years and are now extremely efficient when it comes to keeping in heat and eliminating condensation.