Keystones

Keystone mouldings give a door, window or arch a clear focal point at the top of the opening. They add profile and a considered finish to the surround, and their decorative role means the choice is about proportion and style. The six products in this collection from Exterior Mouldings make it easy to compare shapes and sizes before you decide.

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  • Brighton Keystone

    Brighton Keystone

    Brighton Keystone

    $21.45
    Sale price  $21.45 Regular price 
  • Diamond Keystone - Small

    Diamond Keystone - Small

    Diamond Keystone - Small

    $21.45
    Sale price  $21.45 Regular price 
  • Diamond Keystone - Medium

    Diamond Keystone - Medium

    Diamond Keystone - Medium

    $52.25
    Sale price  $52.25 Regular price 
  • Diamond Keystone - Large

    Diamond Keystone - Large

    Diamond Keystone - Large

    $79.25
    Sale price  $79.25 Regular price 
  • Salisbury Keystone

    Salisbury Keystone

    Salisbury Keystone

    $58.25
    Sale price  $58.25 Regular price 
  • Vaucluse Keystone

    Vaucluse Keystone

    Vaucluse Keystone

    $79.75
    Sale price  $79.75 Regular price 

Browse Decorative Keystone Mouldings

A keystone moulding draws the eye upward and gives the facade a sense of completeness. Depending on the product you choose, decorative door keystones and window keystones sit above the opening they finish, and an arch can take the same detail. Check the product page before deciding whether a design suits your opening.

Look at the overall scale of your opening before you select a design. A compact profile can suit a narrower window, while a larger shape gives a wide entry more presence. Consider how the keystone will read against cornices, columns or simple render, because the surrounding detail changes what feels balanced.

Compare Keystone Shapes and Sizes

The range includes four design families, with the Diamond profile offered in three sizes, so you can weigh character, context and scale. Set the profiles next to each other and think about how much visual presence you want above the opening. A keystone that is too small can feel lost on a broad facade, while an oversized piece can crowd a modest window.

Because keystones are decorative, focus on proportion, profile and placement. Keep the surrounding mouldings in mind, and measure your own opening instead of assuming one size suits every doorway or arch. View each design from the street as well as close up, because scale reads differently from a distance.

Shop the Keystone Range Online

The six keystone mouldings make up the current keystone range from Exterior Mouldings. Open any product page to view its dimensions and details before you choose.

Keystones work well with other decorative pieces when you want a coordinated facade. Compare the corbel collection and the wall plaque collection from Exterior Mouldings, or browse all three collections in one place. If you would rather scan every design at once, view the complete product range listed by category.