PVC is now used by all construction companies for numerous uses.  Here is a brief chemical definition of PVC and its main features.

It is a thermoplastic material, created by chlorination and subsequent polymerisation of an unsaturated hydrocarbon, in turn from a "cracking" or technical division of a petrol byproduct: pure naptha.

It appears in the form of a white powder of a variable granulometry, after the relative addition of stabilisizing agents, lubricants, pigments, antioxidants, opacifiers etc, it can be "drawn" to create profiles whose shapes, dimensions and weights may be extremely varied.

It is not sensitive to acids, to mould and to micro organisms in general: it is elastic, resistant to shocks and, at the same time, rigid. It is self-extinguishing, thermoacoustic and unalterable in time.