System 5-20

Thermally Broken Tilt and Turn Window

The Metal Technology thermally broken tilt and turn window has been designed to offer the specifier the advantages of polyamide themal break technology in meeting the latest thermal requirements of the current building regulations.

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Performance Overview

Weather Performance

Independently weather performance tested to BS 6375-1

Air infiltration BS EN 1026Class 4
Watertightness BS EN 102Class E900
Wind resistance BS EN 12211Class E2400

Average air permeability’s under positive and negative air pressures at 50pa 0.79 m3/h.m2

Size Limitation

Vent SectionVent WidthVent Height
Tilt Before Turn
130-230F1000mm1650mm
131-231F1200mm1800mm
132-232F1500mm2100mm
133-233F1250mm2400mm
132-236F1437mm2000mm
Tilt Only Sashes
130-230F1500mm1500mm
131-231F1600mm1800mm
132-232F1600mm2100mm
133-233F2400mm2400mm
Turn Only Sashes
130-230F1000mm1650mm
131-231F1200mm1800mm
132-232F1500mm2100mm
133-233F1250mm2400mm

Note that maximum height and maximum width cannot be achieved simultaneously.
For complete details of maximum/minimum sizes, handle positions and weight restrictions, see the size limitation charts in Metal Technology’s technical literature.

Security

This system has been successfully tested to PAS 24 (using the annex C method) specification for "Enhanced Security Performance Requirements for Doorsets and Windows" as generally accepted on Secure by Design projects.

BREEAM Sustainability Rating

A+ Rating


Materials

Aluminium profiles are extruded fromaluminium alloy 6060T6, T5, or T4 complying with the recommendations of BS EN 12020-2 / BS EN 755 Parts 1 to 9. Polyamide thermal breaks are produced from glass reinforced nylon sections designed to withstand temperatures in excess of 200°C, allowing the sections to be powder coated after thermally breaking.


Construction

Frame members are mitre cut at 45°, corners are reinforced with extruded aluminium crimping cleats and corner braces, and a secure joint is formed by pneumatically crimping into the extruded crimping cleat. Mullion and transom bars are square cut shaped and fixed securely to the frame by means of stainless steel screws and fixing cleats. All frame joints are sealed during construction against entry of water using Metal Technology’s two-part adhesive. Metal Technology recommend that only A2 or A4 Austenitic (300 series/class 70) stainless steel fixing screws are used in the assembly of their products.


Finishes

The range of sections can be provided in either of the following ranges of finishes:

  1. Anodised to BS 1615 or BS 3987 or BS EN 12373-1
  2. Powder organic coated to BS 6496 or BS EN 12206-1

This system can accommodate a different colour finish internally to that used externally. Metal Technology's powder coating is produced to Qualicoat standards.


Glazing

This system offers internally glazed sashes and can accommodate glazing units from 24mm to 34mm units. Fixed panes may be externally or internally glazed.

Materials

Aluminium profiles are extruded fromaluminium alloy 6060T6, T5, or T4 complying with the recommendations of BS EN 12020-2 / BS EN 755 Parts 1 to 9. Polyamide thermal breaks are produced from glass reinforced nylon sections designed to withstand temperatures in excess of 200°C, allowing the sections to be powder coated after thermally breaking.

Construction

Frame members are mitre cut at 45°, corners are reinforced with extruded aluminium crimping cleats and corner braces, and a secure joint is formed by pneumatically crimping into the extruded crimping cleat. Mullion and transom bars are square cut shaped and fixed securely to the frame by means of stainless steel screws and fixing cleats. All frame joints are sealed during construction against entry of water using Metal Technology’s two-part adhesive. Metal Technology recommend that only A2 or A4 Austenitic (300 series/class 70) stainless steel fixing screws are used in the assembly of their products.

Finishes

The range of sections can be provided in either of the following ranges of finishes:

  1. Anodised to BS 1615 or BS 3987 or BS EN 12373-1
  2. Powder organic coated to BS 6496 or BS EN 12206-1

This system can accommodate a different colour finish internally to that used externally. Metal Technology's powder coating is produced to Qualicoat standards.

Glazing

This system offers internally glazed sashes and can accommodate glazing units from 24mm to 34mm units. Fixed panes may be externally or internally glazed.


Thermal Performance

Metal Technology’s System 5-20, in conjunction with the correct glass specification, is designed to aid compliance with the latest thermal requirements of the current building regulations.

System 5-20U-Frame Values
Fixed Light Outer Frame2.94 W/m2K
Outer Frame and Sash2.89 W/m2K

The following table, based on a standard commercial GGF window configuration and warm edge spacers, demonstrates how such improved U-frame values then contribute to improving the overall thermal performance of a complete window

Window U-valueCentre Pane U-Value
1.1 W/m2K0.6 W/m2K
5-20 glazed-in tilt and turn1.70 W/m2K1.39 W/m2K

Metal Technology can provide tailored U-value calculations using their dedicated estimating software to calculate overall project average window U-values for their full range of systems.


Downloads

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