Facade is the outer wall enclosure of a building, which is not load-bearing and hangs like a curtain, hence it is also known as a "curtain wall". It is a lightweight wall with decorative effects commonly used in modern large and high-rise buildings. A building envelope or decorative structure composed of panels and support structure systems, which can have a certain displacement capacity or deformation capacity relative to the main structure and do not bear the role of the main structure.

1. What is unitized curtain wall?


Unitized curtain walls are attached to the building structure, self-supporting, and portraying an expansive, uninterrupted glass appearance. 


The curtain wall frames (transoms and mullions) and glass or opaque panels are installed and connected together piece by piece. In the unitized system, the curtain wall is composed of large units that are assembled and glazed in the factory, then shipped to the site, and installed on the building. Vertical and horizontal mullions of the units mate together with the adjoining modules. Panels are generally constructed one story tall and one panel wide but may incorporate multiple panels. Typical units are 5–6 feet wide.

Applicable place:

Commercial, residential, apartment, educational, cultural and community development

2. Advantages of unitized curtain wall

  • In this system, all the panels are pre-assembled before arrival on-site, so the speed of construction is fast.

  • Due to the main assembly occurring in a carefully controlled factory environment, this system has higher quality and also easier to manage.

  • For mid to tall rise buildings with large areas of curtain wall, unitized systems are typically reserved.

  • As one of the top wholesale unitized curtain wall system suppliers, we provide high-performance  unitized curtain walls which can accommodate large structural displacement and provide good waterproof performance, making them meet the modern building development level requirement.

3.What is stick curtain wall?


Easy to design and flexible installation method; Materials are easy to store on site, easy to repair, and have lower costs than unitized curtain wall.


Stick system curtain wall, which the members were pre-processed in factory and send to site as parts, require a skillful stick curtain wall installation team when installing the stick type curtain wall. Subframe installation and glazing both are done on-site. The weather sealant of the stick system curtain wall provide the major waterproof. The stick curtain wall allows for easier detailing of connections and larger tolerances in the building structure.

Applicable place: 

The method is usually suited for low-rise buildings or in limited regions.

4. Advantages of stick curtain wall

  • Stick curtain walls will keep some of the heat and light out of the internal, resulting in better thermal efficiency and glare reduction, making the residence more comfortable.

  • It is possible to employ these walls to either block or enable light to penetrate deeper into the building.

  • Additional noise isolation is provided by stick curtain walls from the exterior.

  • Stick curtain walls prevent water and moisture from getting into the building.

  • These walls give it a distinct and more refined appearance for building envelope.

5.Unitized Curtain Wall or stick curtain wall?


Unitized systems are made of different seperate panels (and erected on the building’s façade). On the other hand, stick curtain walls are sent to on-site by parts and installed parts by parts in sequence.

How to choose:

1. Facade size: The larger the size, the more suitable option is unitized. Giving a rule of thumb, we advises unitized for more than 5,000 square meters, and stick if the facade is less than 3,000 square meters, as there isn’t not enough space to achieve the economy of scale to justify unitized.

2. Degree of repetition: If the floor height is constant and the distance between mullions is repetitive, then breaking the facade into units of a similar size—as is the case with unitization—and prefabricating them in the factory makes sense.

3. Shape and dimensions: Taller buildings above six floors are more suitable for unitized systems, but a low, extended building is a better fit for stick.

4. Planarity: If dealing with flat, vertical walls, the on-site assembly of a stick system will be best. But once slope, three-dimensional slopes, and the like are added, the preference shifts to unitized. According to Sola, the same applies for penetrations. The more brackets required for external sunshades, for instance, the more prefabrication is favored.