System 8

Low Rise Curtain Walling

Metal Technology's System 8 offers the designer a wide and diverse range of profiles that will provide structural integrity, weather performance and thermal enhancement. Considered a highly cost-effective glazing solution, System 8 is considered as an optimum solution for expansive low rise glazed applications. All Metal Technology’s window and door systems are complementary to System 8 offering the designer complete versatility.

Performance Overview

Weather Performance - Independently Weather Performance Tested to BS 6375-1

Size Limitation

Air Infiltration BS EN 1026 Class 4 at 600Pa
Watertightness BS EN 1027 Class 9A at 600Pa
Wind Resistance BS EN 12211 Class E2400 at 3600Pa
Air Leakage at 50Pa 0.64 m3/h/m2

Thermal Performance

Metal Technology's Curtain Walling Range, in conjunction with the correct glass specification, is designed to aid compliance with the latest thermal requirements of the current building regulations. The thermal isolator profile has been specifically designed to minimise heat transfer across the mullion and transom.

System 8 U-Frame Values System 8
Mullion 2.51 w/m2k
Transom 2.47 w/m2k

The following U-values for System 17 HR are based on a 7m (w) x 8m(h) curtain walling screen.

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.


Aluminium profiles are extruded from aluminium alloy 6060T6, T5 or T4 complying with the recommendations of BS EN 12020-2 / BS EN 755 Parts 1 to 9.


The system shall be fabricated in ladder modules using a two-piece mullion assembly to be snapped together on site. The frame members shall be square cut and fixed securely to the frame by means of stainless steel screws driven into integral screw ports within the sections. All frame joints are sealed during construction against entry of water using Metal Technology's small gap sealant with glazing tape applied over the front face of each joint. Metal Technology recommends that only A2 or A4 austenitic stainless steel fixing screws are used in the assembly of their products.

Carefully designed fixing brackets have been developed for System 8 to allow a secure and simple fix so that all loads can be transferred back to the building’s main structural form with ease.


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

  • Anodised to BS1615 or BS3987 or BS EN 12373-1
  • Powder organic coated to BS6496 or BS EN 12206-1
  • Metal Technology's powder coating is produced to Qualicoat standards.
  • The System 17 curtain walling can accommodate a different colour/finish internally to that used externally.


The system is externally glazed and can accomodate glazing units from 6mm to 36mm.

Read More »