Specifically details the manufacture, delivery, dismantling of old windows, and installation of new PVC windows, including windowsill and drainage components.
Verify if the "standard installation" includes removal of old windows, installation of flashing ( отливы), sealing (mounting foam), and adjustment of fittings. dogovor montazh plastikovye okna
Ensure the contract mentions installation according to ГОСТ 34378-2018 (or the updated 2024 equivalent). Specifically details the manufacture
Breakdown of prepayment (usually 50–100%) and final payment upon completion. dismantling of old windows
Signed by both sides to prevent disputes over window sizes.