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Description

Cast stone keystones, generally used to finish arches around windows and entrances.

Can be integrated into the window head or supplied on its own. All heads are non-loadbearing components, and must be used in conjunction with a suitable load-relieving lintel.

General information
Specification data
Product Reference

Keystones

Type

Projecting and flush versions available. Consult manufacturer and insert requirements.

Colour

Aire

Cheshire Red

Dark Portland

Light Portland

Light Yorkshire

Millstone Grit

Millstone Light

Natural

Product Options

Type:

- Projecting keystones:

  • Size (h x w x d): 290 x 150/ 250 x 100 mm.
  • To be used with 215 mm or 290 mm high lintels only.
  • Supplied in a minimum of three pieces.

- Flush keystones:

  • Size (h x w x d): 215 x 130/ 290 x 100 mm.
  • To be used with 140 mm or 215 mm high lintels only.
  • Supplied in one piece.

A wide range of non-standard keystone types is available – consult manufacturer and requirements. Keystones to suit lintels in render are also available.

Literature
Third party certifications
  • BS 1217