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Is it necessary to insulate alpex multilayer composite pipes for cold water lines against condensation water?

Yes, insulation of cold drinking water pipes is required according to DIN 1988-200 tab. 8 and 9 in order to prevent condensation and to protect drinking water from warming-up due to elevated ambient temperatures. Pipes that come into contact with the structure (floating, screed, etc.) must be protected with at least one layer of insulation (pipe with protective sheathing). Sound insulation according to DIN 4109 must be provided. Appropriate insulation is recommended for prevention of cracking and flow noise.