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What Types of Plastic Are Used for Windows?

John Papiewski

Home builders use three kinds of plastic extensively for windows: acrylic, polycarbonate and PVC. Acrylic and polycarbonate have sufficient hardness and transparency to make good substitutes for glass. PVC has taken the place of wood and metal in many window frames.


Many homes now have plastic window glazing and frames.

Also known as Plexiglass, acrylic is used as a substitute for glass in window panes. While more expensive and less scratch-resistant than glass, acrylic is lighter and less prone to shattering.


Sold under trade names including Makrolon and Lexan, polycarbonate windows are up to 250 times stronger than glass and 30 times stronger than acrylic. Its greater strength justifies its higher cost.


Window frames made of polyvinyl chloride (PVC) plastic resist weathering, insulate well against heat and sound and are termite-proof. Since PVC has its color built into the material, it needs no painting.