What is a vertical pivot window?
A vertical pivot window turns about a vertical axis on pins set into the head and sill of the frame. In Dutch it is called a “taatsraam”. The pivot points are not at the side, as with a casement, but set in from the edge: often at about a third of the width, sometimes in the middle. When it opens, one part of the sash swings inwards and the other outwards.
A window that turns the same way about a horizontal axis, with pivots in the side jambs, is a horizontal pivot window. A door built on the same principle is a pivot door.
The benefits are a small swing on each side and the ability to clean the outside of the glass from indoors. Large pivot windows also look clean because no hinges are visible. The drawbacks are that an insect screen is hard to fit and that you must keep space clear indoors for the part that swings in.
In practice
- Keep space clear inside. Curtains, plants and a deep window board can get in the way of the inward-swinging part. Measure the swing.
- Mind the seals. Because one part opens out and the other in, the rebates change sides at the pivot. A good continuous draught seal is especially important there.
- Choose suitable hardware. Pivot hardware must match the weight of sash and glass. Heavy insulating glass needs heavier pivots.
- Fit a restrictor or stay. An open pivot window can slam or swing through in wind. A friction stay or restrictor prevents damage.
- Think about security. For easily reached windows, choose hardware and locking points tested for burglar resistance.
Common mistake: fitting a pivot window where an insect screen or roller blind will later be needed on the inside. They do not combine well.
Related terms
- Casement window
- Top-hung window
- Sash window
- T-window
- Fanlight
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