Which window frames are the best: Fiberglass, PVC or Fiberglass hybrid uPVC?
...windows may be the cheapest, we are not fans of PVC or uPVC as they are both made of polyvinyl chloride which is a very toxic and dangerous substance. PVC window frames are also more susceptible to warping with extreme temperature fluctuations, so for colder climates uPvC may be better of the two. UPVC has no plasticiz...