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The Alu-Timber window range includes casement and tilt and turn windows. The range provides side, top hung or fixed windows, with options for larger sizes providing a french casement option.Frames comprise of internal timber sections, manufactured from Larch as standard but available in a range of timber species, bonded to external aluminium profiles, with a flexible seal between the timber and aluminium framing sections.

Performance Standards:

  • The Alu-Timber range has exceeded the requirements of BS 6375, achieving 600 Pa for air, 500 Pa for water, and wind resistance to 2400 Pa.
  • Wind loadings and calculations are undertaken to BS 6399 and CWCT standards.
  • Windows are designed to conform to BS 7950.

General information
Specification data - Composite window units
Product Reference

Composite Windows


Fixed light

Side hung

Top hung

Tilt and turn


As drawing ___

As schedule ___

Internal framing






As drawing ___

As schedule ___

External framing/ Cover cap

Black anodized aluminium

Bronze anodized aluminium

Silver anodized aluminium

Liquid organic coated

Polyester powder coated, colour

Finishes are available in all RAL, Syntha Pulvin and BS colours.

As drawing ___

As schedule ___

Glazing -

Double glazed

Triple glazed

As drawing ___

As schedule ___


24 mm

28 mm

As drawing ___

As schedule ___

Standard product features

Dimensions (maximum w x h):

- Fixed light window:

3200 x 3200 mm.

- Top hung window:

1300 x 1500 mm.

- Side hung window:

900 x 1500 mm.


  • Coated with three coats of lacquer.
  • Glue laminated and finger jointed in profile lengths, glues and adhesives comply with BS EN204 Category D4.
  • Produced from sustainable, managed forests.


Extruded from EPDM. rubber.


  • All glazing shall comply with the requirements of BS 6375 and BS 6262: 1982, British Standard Code of Practice for Glazing in Buildings.
  • Glazing beads and gaskets allow for glazing of 28 mm units.
  • Depending on the configuration, glazing beads are fitted internally or externally.
  • Profiles have drainage slots in the glazed recess and rebated areas to ensure ventilation and drainage of the rebates as well as providing a water barrier.
  • Where specified, hermetically sealed double glazed units shall comply with the requirement of BS 5713: 1979.

Product Options

External framing/ Cover cap:

Extruded aluminium profiles are of aluminium alloy 6063 T5, T6 to BS EN 12020 and BS EN 755-1: 1997.

  • Alu-Timber aluminium finishes are available in all RAL, Syntha Pulvin and BS colours.
  • Silver, bronze and black anodizing AA 25 to BS EN 12373-1: 2001 or BS 3987.
  • Liquid organic coating to BS 4842: 1984.
  • Polyester powder coating to BS 6496: 1984. Polyester powder coated profiles are to a minimum of 60 microns.