Composite Window Frame
This information reflects our best understanding of product composition in 2024.
Composite wood window frames are typically made of wood fiber held together with a plastic binder, such as polyvinyl chloride (PVC). Composite wood frames are used for a variety of windows such as double-hung, single-hung, awning, fixed, sliding,...
Composite wood window frames are typically made of wood fiber held together with a plastic binder, such as polyvinyl chloride (PVC). Composite wood frames are used for a variety of windows such as double-hung, single-hung, awning, fixed, sliding, and casement as well as patio doors and offer improved strength and heat stability compared to vinyl windows at a lower cost than wood windows. Manufacturers use pre-consumer recycled wood fibers, and sometimes recycled polymers, as inputs, creating an avenue for waste generated from the manufacture of other wood and vinyl windows. The resulting composite material includes pigments and does not require painting. Pigments such as titanium dioxide also help stabilize the polymer against degradation from UV radiation. This CP describes a white composite wood window with a PVC binder, and excludes other window components that may be used with all types of frames such as glass pane(s), films, sealant, seals, spacers, gas fill, and hardware. Other polymer binders and additional pigments may be used; see the All Contents for details.