Vinyl Windows Versus Fiberglass Windows

As you decide to undertake a window replacement program for you home, you have two good options, that of fiberglass and vinyl. Vinyl is the commercial word for polyvinyl chloride or PVC that is mostly used for making a variety of durable plastic materials for domestic and industrial applications and includes plumbing and electrical pipes. Polyvinyl chloride is a complex combination of different chemicals, including plasticizers and pigments. Because of the chemicals used environmental concerns were raised against PVC but they seem to have been resolved now. Fiberglass is derived from glass fibers that are combined together to make sheets.

Being on the net to compare the two kinds won’t really help, as the manufacturers of each kind will project its positive features only. Obviously, manufacturers of fiberglass windows will highlight the positive aspects of fiberglass, whereas the manufacturers of PVC windows will talk about all the positive futures of their product. Ultimately it is decided by your requirements. You’ll have to see what goes better with the interiors, as well the exteriors of your home, though both are available in a variety of colors and designs. Then, you also need to consider your budget.


An important characteristic that we look for in windows is their capacity to insulate the room. PVC windows that have trapped air pockets within provide better insulation than fiberglass windows. As a matter of fact vinyl windows offer three times the insulation as offered by fiberglass. If insulation were your preference, you should go for vinyl windows.

Fiberglass is claimed to be stronger than vinyl. Though technocrats may debate on that issue, practically good quality fiberglass windows outlast the vinyl kind. However, it is true that fiberglass windows do not contract or expand as much as vinyl windows with changing temperature. Therefore they don’t suffer much because of weather changes.
Vinyl windows are prone to warping, rotting, bowing, cracking, and shrinking in areas with harsh weather. You will not encounter such problems with fiberglass windows, as they are not so brittle and temperature changes don’t affect them so much.

A helpful feature of fiberglass windows is that you can repaint them in a color of your choice, thus allowing you to change their color as and when you change the interiors of your room, thus you won’t need to change the complete window. On the other hand vinyl needs no painting or can’t be repainted rather.

Characteristically, PVC is prone to catch and spread fires. That way, fiberglass windows are safer as fiberglass being derived from glass fibers is not easily flammable. Fiberglass is more expensive than vinyl.

So, we end up concluding the most often way: each product has it merits and limitations. It all depends upon individual’s preferences. However, it always helps to know and look at the available options and decide what suits you most. It would be good to look at the designs and colors of both the types and find what goes best with the rest of your interiors. As far as materials are concerned, both are equally good and dependable. Yet, you may like to consider other factors. For instance if you live in a place that faces a wide difference of temperatures with changing climates, you may prefer to have fiberglass.

Leave a Reply