BUG mullion-transom construction
Your partner for mullion-transom facades in wood-aluminium construction
Product overview
The mullion-transom construction facade 50 at a glance
The elegant mullion-transom construction facade 50 from BUG stands out with refined, narrow external width. Numerous technical features help to optimise design and production. Variable sealing systems and profile dimensions make the mullion-transom construction the perfect partner for wood-aluminium facades. The glass thicknesses can be changed flexibly from panel to panel, allowing for different installation situations and creative freedom.
Benefits of BUG’s mullion-transom construction:
A mullion-transom facade combines wood and aluminium into a robust system. Choose aluminium elements from BUG for your facade and enjoy the benefits of advanced technical features and refined aesthetics:
- Narrow exterior width of 50 mm on the outside
- Can be used for 50 mm or 60 mm wooden substructures
- High thermal insulation (Uf values from 0.8 W/m²K to 1.7 W/m²K depending on the construction)
- PVC-free insulating profile
- Usable glass thicknesses from 24 mm to 52 mm and up to 450 kg filling weight per panel (applicable for vertical glass walls)
- Simple installation of opening elements
- No continuous screwing from the outside into the timber construction
- Modern, screwless design
- Optimum and effective glazing rebate ventilation without additional effort
- Perfect protection of the substructure (and therefore low maintenance)
- Optimum drainage of moisture, waterlogging and condensation
Installation of mullion-transom constructions made of wood and aluminium
The modular design of the BUG mullion-transom construction allows for flexible design of large openings and facade areas. Furthermore, the facade can be prefabricated by a specialist company and then simply assembled and installed on site.
Professional installation is also critical to the long-term performance and durability of a mullion-transom facade.. Choose materials that meet the specific requirements of the building. The simple design principle ensures a high level of installation safety.
Create unique designs with the mullion-transom construction
The mullion-transom construction facade 50 features a particularly narrow external width of just 50 mm, serving as a delicate visual highlight and can function as a transparent wall spanning several storeys. Take advantage of the wide variety of combinations and the extensive range of fittings to create different room uses and individual architectural styles.
Mullion-transom facade with integrated, stepless sealing system
The mullion-transom construction made of wood and aluminium, combined with insulating bars, ensures a high level of thermal insulation of the frame construction. A patented sealing system and integrated ventilation channels ensure controlled removal of condensation and moisture. The panel by panel separation of the glazing means that drainage levels are not required. Each glass panel is functionally independent and does not affect adjacent panels.
Water tightness under heavy rain and thermal insulation
The insulation profile used in the mullions and transoms guarantees excellent thermal insulation. The single-level sealing layer ensures reliable ventilation of the glazing rebate and drainage of condensation. This is a key advantage over other systems on the market, as it enables BUG to achieve high water tightness under heavy rain and excellent thermal insulation values.
Effect of thermal separation
In order to use aluminium profiles in wood-aluminium constructions as efficiently and cost-effectively as possible, care should be taken at the design stage to ensure that the mullion-transom construction is designed with thermally insulated profile systems. Thermal bridges and large temperature differences between the central and edge areas of the glazing can be prevented by carefully installing the outer clamping profiles with thermal separation from the base profile on the inside.
Also suitable for passive house standards
The mullion-transom construction can be optimised to meet the stringent requirements of energy efficiency and thermal insulation for passive houses. By using thermally separated profiles with high thermal insulation, mullion-transom systems can minimise thermal bridging and significantly reduce heating and cooling requirements.
Security
Small additions, such as special anti-burglary glazing, provide optimum protection without compromising appearance. Simply choose the glazing technology you want for your structure and you will get a high level of security.
FAQ – mullion-transom construction
Below we answer the most frequently asked questions about mullion-transom facades.
A mullion-transom construction is a load-bearing structure made of wood and aluminium, comparable to a skeleton. In this case, the wooden structure provides structural support and the aluminium system supports the glazing. Together with the glazing, this creates a secure mullion-transom facade. Elastic seals in the base and clamping profile ensure that the glazing is held securely in place..
A mullion-transom facade is suitable for large, multi-storey glass facades. Mullion-transom facades are traditionally used where large installation heights and panel widths are required.
BUG supplies the aluminium profile system for holding the glazing for mullion-transom construction in wood-aluminium construction. Sealing profiles, system screws, insulation profiles and other accessories are also included. The wooden substructure and glass panels are available from specialist companies or from our specialist dealers and processors.
In general, mullion-transom construction offers the advantage that aluminium is a corrosion-resistant, load-bearing yet lightweight material. It can therefore be flexibly adapted to a building’s architecture and requires minimal maintenance. The aluminium profile systems also provide reliable and durable protection for the supporting wooden structure. Longevity and reliability are guaranteed.
Seals play a vital role in preventing water and air ingress and providing thermal insulation. For this reason, BUG mullion-transom constructions are fitted with matching glazing seals made of high-quality EPDM material for both the interior and exterior.
All common window types can be installed in a mullion-transom facade – regardless of opening type, shape, manual or electric operation. As well as mullion and transom windows, doors and other elements can be integrated.
Unrivalled quality: BUG mullion-transom construction
BUG is a specialist in extruded aluminium profiles. We produce systems that integrate thermal insulation and water tightness under heavy rain, modular construction and easy installation from the start. If you have any questions about mullion-transom construction, please contact us. Simply use the contact form. We will then get in touch with you personally.
