Windows and exterior doors

Summary

The contract covers the supply and installation of windows and doors for a new apartment building at Inrather Straße 160, Krefeld. The work includes aluminium entrance doors, PVC windows and balcony doors in various sizes and configurations, roof windows, and galvanised steel basement windows. Installation includes the required fixings, joint filling, and connections providing weather, thermal, moisture and acoustic protection. Typical stated requirements include security class S3, thermal transmittance Uw 0.8 W/(m²K), a g-value of 0.55 and sound insulation of 35 dB; roof windows are specified with sound insulation of 38 dB. The contractor must prepare and submit the necessary structural calculations and installation drawings, and provide operating, maintenance and cleaning instructions after completing the work. The bid must be submitted electronically by 2 November 2026 at 10:00. It must include the fully completed priced bill of quantities and the required evidence; alternative bids are not permitted. Price is the sole award criterion. The tender form gives the work period as 11 January 2027 to 8 October 2027. The bidder must provide current suitability evidence, including registration, insurance and tax and social-contribution certificates, together with information on comparable work, turnover and employee numbers for the last three completed financial years. Declarations concerning anti-corruption requirements, minimum-wage compliance and Russia-related sanctions are also required.