Keystone
Cast stone keystone.
Cast stone keystone. Integrated into a window head or placed on its own above a window, a keystone adds some architectural flair to a building’s facade.
Standard designs available, all of which can either sit alone above a window or can be built into the window head. Bespoke keystones to meet individual requirements.
Material:
- Haddonstone (Semi-dry cast limestone):
High quality semi-dry cast stone, consisting of over 50% limestone aggregate. With a surface texture similar to Portland Stone, Haddonstone is regularly used alongside or as an alternative to natural stone.
- TecStone (wet cast limestone):
High quality wet cast stone, comprising over 60% natural limestone aggregate. Denser than the Haddonstone material, TecStone is acid etched as standard to provide an attractive appearance similar to a finished natural stone. Designed to meet demanding performance criteria and can incorporate structural reinforcement and cast-in fixings. TecStone is the preferred material for architectural projects where structural performance is required.
Material | Haddonstone (semi-dry cast limestone) TecStone (wet cast limestone) |
Uniclass 2015 | |
CAWS | F22/110 Cast stone F30/770 Cast stone dressings laid in cement gauged mortar F30/771 Cast stone dressings laid in hydraulic lime:sand mortar |
Product Reference | Keystone |
Type | Q900Q920BespokeInsert requirement. |
Material | Haddonstone (semi-dry cast limestone)TecStone (wet cast limestone) |
Colour | Bath 02Ivory Limestone ILPortland 01BespokeInsert requirement for colour. |
Accessories | NoneCast-in fixingsInsert requirements for cast fixings. Cast-in lifting socketsInsert requirements for lifting sockets. |
Standard product features | Compressive cube strength after 28 days (minimum):
Both materials exceed the requirements of the United Kingdom Cast Stone Association (UKCSA) specification and comply with the requirements of BS 1217, BS 5642-2+ A1 and BS EN 13198. Haddonstone:
TecStone:
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Product Options | Type:
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