Windows Sash component:

1.Glass: ?Two sheets of glass for a double-paned window, one sheet for single panes.

2.Frame: ?Frame is a convenient term for the wood, fiberglass, vinyl, or metal parts that hold the glass together. ?It is actually composed of rails (horizontal pieces) and stiles (vertical pieces).?

3.Grille: ?Within that frame may be smaller sections of window that go under different terms but collectively called grillework. ?Older, single-pane windows may have true mullions, in which panes are separated by wood. ?Newer double-pane windows may have a \"mullion look,\" called GBG or grille-between-glass, in which false mullions are placed between the sheets of glass and serve no structural purpose. ?GBGs provide aesthetic appeal and allow for easier cleaning of the glass.

4.Gaskets: ?Glass must be sealed into the framework. ?Gaskets made of rubber or?TPVs (thermoplastic vulcanizates) serve this purpose.

5.Gas: ?Arguably, this colorless, odorless gas injected between the sheets of gas for its insulating properties can be said to be an element of a window sash, too. ?Single-pane windows have no gas.

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