Each individual cover manufactured by SUM Poland undergoes a detailed two-stage quality control process!!!

Yes, every cover is inspected twice.
We must be certain that a product carrying a nameplate with the SUM Poland logo meets all requirements for this type of insulation. The jacket must conform to the technical drawing, and aesthetic aspects are also taken into account.

In the photograph shown, our Quality Controller is checking that the cover’s dimensions correspond to those specified in the design.