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Outside Mount Measuring for a Square-Set Window

A square-set window has no separate architrave, so an outside-mounted shutter fixes directly to the wall face around the recess.

Measuring Outside Mount for a Square-Set Window

A Square-Set window is an opening without a timber frame (Architrave).

Measure from the inside edges of the opening; the required shutter frame allowance can then be applied around the opening.

  • Measure the drop in three places.
  • Measure the width in three places.
  • Use the largest width and largest drop

If you do not have a protruding window sill: add 42mm to each side — 84mm total to the width and 84mm total to the drop.

If you have a protruding window sill: add 42mm to the left, right and top only — 84mm total to the width and 42mm total to the drop.

Measuring Outside Mount for a Window with a Sill

The height begins at the top surface of the sill.

  • Measure height in three places from the sill to the upper reference point.
  • Measure width in three places.
  • Use the largest width and largest height.

 

For a protruding window sill: add 42mm to the left, right and top only — 84mm total to the width and 42mm total to the drop.

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