uPVC is currently considered the most eco-friendly plastic in the industry, consisting of more than 57% Chlorine (from ordinary rock salt). The stabilizers in our PVC is heavy metal free – being Calcium based, thus labelled as a “green” PVC. The process itself of refurbishing still perfectly working windows back to its former glory (in situ!) shouts “energy and environment saving!”. Why remove and replace a working window, if you can up cycle at ½ the cost? With the aid of insulating sealing gaskets, steel can be just as “air tight” as any other ordinary system. At a fraction of the costs.