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Georgian & Astragal Bars

The Right Glazing Bars for Your House

The bar pattern says more about the age of a house than almost anything else on the front elevation. Here's how to choose it, and how we make it.

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Patterns by Period

Four patterns, two hundred years of sash windows.

Glass was expensive and made in small panes in the eighteenth century, so Georgian sashes are divided into many panes. As larger sheets became affordable through the nineteenth century, the bars thinned out and disappeared.

White six over six sliding sash window in a stone wall
Georgian

Six over six

The definitive Georgian sash: six equal panes in each sash, slender bars and no horns.

White two over two sliding sash window in an ivy-covered brick wall
Victorian

Two over two

A single upright bar in each sash. The classic mid-Victorian arrangement, usually with horns.

White sliding sash bay window on a red brick Victorian house
Late Victorian & Edwardian

One over one

Clear, undivided sashes, once larger panes of glass became affordable.

Round-headed sliding sash window with Georgian bars in a stone reveal
Georgian & Victorian

Arched heads

Bars carried up into a round head, for stair windows and grand front elevations.

Photographs show the sash range we install, on homes across the UK. For our own work, see our recent projects.

Two Ways to Make Them

Astragal bars or Georgian bars?

Close-up of astragal glazing bars meeting on a white sash window
On the glass

Astragal bars

Fixed to the outside face of the glass, so each bar stands proud and casts a fine shadow line. From the street the window reads as individual panes, just like a traditional glazed sash. Our choice for the front of a period house.

Close-up of a glazing bar junction on a white sash
In the glass

Georgian bars

Set inside the sealed glass unit, between the panes. The pattern is there, but the glass is completely flat, so cleaning is quicker. A practical choice for rear elevations, kitchens and bathrooms.

Getting It Right

How we set out the bars.

Panes that line through

Bars on the upper and lower sash line up vertically, so the window reads as one grid, not two.

Proportioned panes

Georgian panes are taller than they are wide. We set out each opening so the panes keep that proportion, rather than dividing a nominal size.

Matched across the house

Where windows differ in width, we keep the pane sizes consistent across the elevation and around bays.

FAQs

Glazing bars: your questions answered.

Astragal bars are fixed to the outside of the glass, so they stand proud and cast a shadow, like the glazing bars of a traditional sash. Georgian bars sit inside the sealed glass unit, which gives the pattern with completely flat glass to clean. Astragal bars look the more authentic of the two from the street.
Free Home Survey

Book Your Free Sash Window Survey

We'll look at your existing windows, measure every opening individually, bring real colour, glass and hardware samples, and give you a fixed written quotation with no pressure.

  • Free, no-obligation home survey
  • Every opening measured individually
  • Fixed written quotation
  • Directly employed installers
Prefer to talk? Call 01865 416496
Free Home Survey
Book Your Free Sash Window Survey

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