PVC (poly-vinyl chloride) is just about the most hated (and widely used) plastic in our homes. To start with, the manufacturing process uses carcinogenic vinyl chloride (aka VCM) as the base material, and to finish with if it is disposed of by burning it releases other carcinogenic compounds – dioxins – into the atmosphere. Some PVCs have phthalates added for elasticity, which are linked to cancer, kidney damage and interference with the reproductive system. To identify PVC, look for the number 3 as the plastic type on the product.

One of the most common uses of PVC is PVC-u (or uPVC) for replacement windows. Why not use wood – hardwood will last just as long, look just as good, but will admittedly require a little more maintenance.

PVC is difficult to recycle, and much ends up in landfills. Opinion is that there is no need for this plastic to be produced at all – if you want to help speed its demise avoid it.

More information, especially on alternatives, is at PVC Information. High and low density polyethylene (HDPE, LDPE), polypropylene (PP), polyethylene (PE) and polyethylene tetraphthalate (PET) are currently thought to have less all round environmental impact.