Ventilated façade structures

The basis of the ventilated façade is the suspended frame that bears the weight of the cladding that is fastened to it. Frames are made of various materials such as galvanised steel, stainless steel, timber and aluminium. All of the materials used to build the load-bearing structures of ventilated façades have certain advantages and disadvantages, as compared to one another. This might mean differences in durability, resistance to environmental impact, price, complexity of installation or in the mechanical or physical properties of the material.

Ever since the emergence of the ventilated façade, the aluminium frame has been the structure of choice across most countries due to its great resistance to corrosion, simple installation, light weight, price and the fact that it is easy to work with.

The guide profiles used in the construction of ventilated façades are typically made of a more malleable aluminium alloy and the load-bearing corner brackets are produced from a sturdier aluminium and magnesium alloy.
The type of metal frame, the distances between profiles, the thickness of the metal frame's components, screws and their quantities should all be selected and calculated in consideration of wall type, wind load in certain areas, building height, cladding element type and other factors.

Plantas UAB manufactures aluminium ventilated façade frames for the installation of cladding with a ventilated air gap. The frame is universal, allowing the use of different types of components and cladding materials such as:

  • fibre cement panels; 
  • High-pressure laminate (HPL) panels; 
  • Engineered stone panels; 
  • Ceramic tiles; 
  • Porcelain (ceramic) panels; 
  • Aluminium composite panels.

The aluminium frame consists of the following components:

  • Thermal insulating washers (placed between corner brackets and the wall);
  • Corner brackets (also known as corner braces);
  • Masonry screws;
  • Profiles;
  • Self-tapping screws/bolts (for fastening profiles and corner brackets);
  • Fastening hardware for cladding material: bolts, screws, staples, anchors, wall plugs, glue, etc.

                

 

 

                                 

 

                                            FIG. Components of an aluminium façade frame

 

Technical parameters of an aluminium frame:

ComponentMaterialStandard
Corner bracket

EN AW-6063/T66 make
aluminium alloy

EN 573-3:2007, EN 515:1993, EN 15088:20005
Profiles

EN AW-6063/T66 make
aluminium alloy

EN 573-3:2007, EN 515:1993, EN 15088:20005
Self-tapping screws Stainless steel, A2 DIN 7504K
Plinth profile Aluminium EN AW 5754, H22 EN 573-3, EN 485-1, EN 485-2, EN 485-3, EN 485-4
Masonry screws Galvanised steel/nylon Certificate Z-21.2-589
Thermal washers Polyethylene LDPE Cast

Physical indicators of aluminium:

Physical indicatorsValues
Elastic modulus E (MPa) 70 000
Shear modulus G (MPa) 27 000
Poisson's ratio v 
0,3
Linear expansion coefficient α, °C-1 0,23  10-6
Average density ρvalue, kg/m3 2700

Joint detail of aluminium ventilated façade frame:

                                         

1. Masonry screw
2. Rivet
3. Bracket
4. Self-tapping screw/rivet
5. Profile
6. Thermal insulating washer PE
7. Cladding element
8. Thermal insulation.

The aluminium frame is an essential structural element of the ventilated façade and has to withstand all of the environmental impact and loads that the façade has to bear. This means that the frame must be meticulously designed, calculated, tested for allowable masonry screw loads (for each individual project) and then installed.