Step 1
Measuring the façade surfaces to be clad:
Step 2
You can determine the separation of the individual profile lengths, and thus also the design of the façade, depending on the direction of the profiles on the façade (horizontal, vertical or diagonal).
Please pay attention to production related profile lengths and correct execution of expansion joints.
In the case of installation with an even offset or in the case of consistent profile length, it is recommended to divide the façade, using a siding, siding.X or perforated siding, in order to achieve the required quantity.
Use the standardised PREFA installation schemata for determining the quantity of a siding.X façade.
Step 3
Cut-outs, such as for doors or windows, that partially intrude into a siding should be ignored during material determination and adapted on-site (areas marked in red).
Gaps, such as window openings < 1 m² should be ignored.
In the case of triangular surfaces, such as gable wall cladding, the symmetrical orientation of the siding is important to ensure a visually attractive appearance.
Diagonal cuts must be done on site to make the panel suit required dimensions. Consider that prepared panels should be approx. 10 mm shorter to allow unobstructed installation. Cutting edges are concealed with a channel profile.
Note
If a diagonal stop end is required to stiffen the panel, do not forget to add dimensions.
For logistic reasons, PREFA recommends grouping at least 4-6 parts per profile length and determining as follows:
Step 4
You should also calculate the running metre for the starter profile and the amount of screws required (6–9 pcs./m² – depending on the spacing on the substructure) and storm-proof clips if necessary.
Step 5
Do not forget to order spare material. Depending on the order volumes, PREFA recommends at least 1-2 sidings with the longest profile length.
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