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PVC profiles classification

 


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When a client decides to replace a window or a door, the first things that come into his mind are:

• the prices. How expensive is the profile?
• the brand name of the profile. What brand should I choose: Gealan, Rehau, Veka …?
• how many chambers should the profile have etc… Should I choose 3 chambers profiles, 5 chambers or higher;
• and the list could continue.

Of course these are important issues and there a many articles that gives criteria to differentiate them and what to choose.
One aspect that should never be neglected is PVC profile class. According to European standard SR EN 12608 – Unplasticized polyvinylchloride (PVC-U) for the fabrication of windows and doors.

Classification, requirements and test methods – PVC profiles are divided into 3 classes according to:

• exterior wall thickness (practically the 2 sides of the profiles that you can see from inside and outside of the house);
• interior wall thickness (practically the side of the profiles that “sits” on the building wall and the side that sustain the glass);

as follows:

• A class - exterior wall thickness ≥ 2.8mm, interior wall thickness ≥ 2.5mm;
• B class - exterior wall thickness ≥ 2.5mm, interior wall thickness ≥ 2mm;
• C class – no requirements.

A profile can be part of a class if both conditions are respected simultaneously; otherwise the profile is suitable for immediate inferior class.

For example: a profile with exterior wall thickness of 2.9mm and interior wall thickness of 2.4mm can be classified as B class. You can ask the producer certificate from notified laboratory.
A window made of A class profiles has a lower transfer coefficient then a window made of C class profiles, but its price will be higher.

To have a lower thermical transfer coefficient is better because heating loss is smaller. The higher price of the window can be compensated by energy savings.
Competitive price can be obtained by having a balanced rapport between: profile class - montage depth – number of chambers.



P. S. In our next articles we will pubslih a thermal transfer coefficient calculator, easy to use, and in pdf format.

Author details : Termopane preturi ; Termopane Gealan ; Termopane . . .

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