Comprehensive system for high-rise buildings with thin aluminium frames surrounding glass panes and fast & easy installation

MU4200 Semi Structural Thermal is MUSKITA’s comprehensive curtain wall system offering simple, safe and sound solutions to the most demanding design concepts of modern architecture. Ideal for low and high rise buildings, MU4200 Semi Structural Thermal is engineered for fast and easy installation, with windows blending seamlessly with glass units creating beautiful building façades.

The system is designed with a thin visible aluminium frame surrounding glass panes, concealed hinges and the choice of top hung projected openings at any part of the entire screen.

The system is also available without thermal insulation.

MU4200 Semi Structural
Engineered for extreme weather conditions with excellent performance ratings
  • The system is thermally insulated and “severe weather rated” by full size dynamic tests conducted according to CWCT UK test sequence and meets the strictest European and international standards achieving global commercial success particularly in countries such as England, Ireland and Germany.
  • The system is closed at 3 points with an EPDM watertight seal, achieving perfect air and water tightness, preventing the transfer of temperatures from the outside in and vice versa.
Combines fast and easy installation with design flexibility
  • The system is engineered for fast and easy installation particularly on high-rise buildings. The glazing units are hung onto the building frame with specialized accessories for easy and quick on-site installation, greatly reducing cost. 
  • MU4200 Semi Structural has the important advantage of flexibility. Any fixed frame can be converted to an opening frame by simply changing the accessories, providing the choice of top hung projected openings at any part of the entire screen.
  • Accommodate a wide range of shading solutions and are compatible with the MUSKITA range of windows and doors.
  • Custom made solutions are offered for specific project requirements.
  • Metal and finishing directly from our own in-house production lines assures quality, fast deliveries and offers substantial cost reductions via mullion length optimization for value added engineering.
Technical Features & Solutions
  • The system comes with a 12 mm (non-thermal) or 14 mm (thermal) visible aluminium frame which provides mechanical support for added security on normal double-glazed units thus substantially reducing costs.
  • Vertical and horizontal spaces of 15 mm between the units allow easy access for cleaning.
  • Mullions are 55 mm and 70 mm hollow sections, providing very high resistance to wind pressure. The 70 mm mullion allows easy introduction of standard partitioning.
  • Mullions are interspaced at each floor so that each floor takes only the weight of its frames, which allows for better expansion and contraction.
  • Special flanges are placed on horizontal transoms to eliminate noise arising from expansion and contraction.
  • Glass units are independent of the structure and are secured at the top.
  • The system is engineered with the advantage of being flexible. It can move up or down, left or right, greatly reducing the impact of earthquakes. Movements from seismic loads on mullions and transoms are absorbed by the specialized support brackets of the system.
  • Mullion fixing is achieved with aluminium brackets that are adjustable left or right and up or down. Brackets can be anodized or powder coated and steel brackets may also be used.
  • The number of fixing points of the frame are in proportion to its height with no less than 4. The use of special, high resistance brackets with rounded surfaces at the contact points gives secure fixing, while also increasing freedom of movement of the frame.
  • The system offers several auxiliary profiles for the upper and lower trim of vertical column profiles and special profile joints between floor slabs.
  • The system is ventilated by the frame, mullions and transoms.
  • Our technical support team offers shop drawings for large projects, detailed static, acoustic and thermal calculations, as well as installation guidelines and support to architects and specifiers.
Technical Characteristics
Finishes & Colours
Technical Characteristics: MU4200 Semi Structural
Mullion Width
55 & 70 mm
Mullion Depth
From 54.5 - 150 mm
Maximum Sash Weight
120 kg
Glass Options
Up to 33 mm
Performance & Classification: MU4200 Semi Structural
Thermal Transmittance – Uw [W/(m²K)]
≥ 1.5
Sound Reduction
44 dB
Air Permeability
600 Pa
Water Tightness
600 Pa
Resistance to Wind Load
2400 Pa Service Load; 3600 Pa Safety Load
Finishes & Colours
Powder Coating
Sublimation & wood finishes
Architects & specialists - technical data

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