Standard vs Custom
Perforation is a design element highly valued by designers as it creates depth in the siding, while creating a unique look.
Perforation is also used to create patterns and insert plays of light.
Although there are certain rules to follow when incorporating perforated liner, it opens up an endless range of possibilities for designers.
The first thing to determine is if you can use standard “Pre-perforated” aluminum sheet for your project.
Pre-perforated material is less expensive than custom perforation.
In addition, if the sheets are in stock at a supplier, the total production lead time of your project will be shorter.
However, note that in about 80% of situations, custom perforation is required to meet the concept of the project.
Custom perforation is required, if any of these conditions are desired:
– If you want more than 1 hole size on the same panel;
– If you want to have a “non-perforated” perimeter border on each panel;
– If you want to interrupt the perforation on a panel;
– If you want a shape of holes other than round;
– If you want random perforation or make patterns;
– If the perforation pattern is not available from a supplier;
STAGGERED vs INLINE
The standard perforation is mainly made with round holes and is detailed in 2 types of hole positioning:
Staggered and Inligne.
R: Represents the diameter of the hole
T: Represents the center distance between 2 staggered holes
U1: Represents the center distance between 2 vertically aligned holes
U2: Represents the center distance between 2 horizontally aligned holes
The diameter of the hole (R) is mainly kept in inventory according to the following diameter dimensions :
0.062″ | 0.093″ | 0.125″ | 0.140″ | 0.156″ | 0.187″ | 0.250″ | 0.312″ | 0.375″ | 0.500″ | 0.750″ | 1.000″ | 2.000″
The open area is the area occupied by the perforation over the total area of a sheet or panel. We recommend not to exceed 40% opening in order to avoid weakening the material too much.
It is possible to quickly calculate the open area with the following formulas:
For a staggered perforation: % = R2 x 90.69 / T2
For inligne perforation: % = R2 x 78.5 / (U1 x U2)
What parameters should be followed when developing a custom perforation?
- The minimum diameter of a hole must be at least equal to the thickness of the material.
For example: If we are using 1/8″ thick aluminum sheets, the smallest possible hole will be 1/8″;
- The minimum distance between 2 holes must be at least 0.060 “;
- A non-perforated border of 1/8″ is required on the perimeter of the raw sheets.
- We recommend not to exceed 40% opening in order to avoid weakening the material too much.
NON-PERFORATED BORDER FOR PANELS
Whether it is for aesthetic or other reasons, it is often required to have a non-perforated border around the perimeter of a panel.
For example, when you want to have a perforation with the DA-1000 or DA-5000 system, it is necessary to provide a non-perforated border of approximately 2″ at the perimeter of the panel in order to avoid seeing the extrusions attached to the back of the panel.
It is the same for all systems, if you want to avoid bending or cutting through the perforated material, you must provide a non-perforated perimeter for each panel.
Therefore, it is important to note that each panel with a different dimension will automatically be a custom-made drawing and will incur launch costs related to the perforation. In order to limit costs, it is judicious to determine standard panel dimensions in order to limit the quantity of different panel models.
Don't limit yourself
Knowing the considerations and limitation, let your imagination run wild and don’t limit yourself to what is known. Perforation offers endless design possibilities, whether it is by the shape of the holes, the perforation pattern, the representation of an image or a random pattern, your project will be extraordinary and will attract the eye of the public.