Windows and doors professionally installed
Professional installation is the key to the durability and functional reliability of your windows and doors. With modern construction technology and precise sealing solutions, you prevent heat loss and effectively protect your home against moisture and drafts. Use the perfectly fitting installation material from Gretsch-Unitas, which meets all requirements of the Energy Saving Ordinance. Together with planners, craftsmen, and builders, we ensure that your construction project is perfectly implemented from the very beginning – with coordinated systems from a single source.
Fastening technology
Professional fastening ensures the long-term function and service life of your windows. GU offers high-quality fastening solutions for the building envelope that guarantee secure installation. This reduces error costs and protects your construction project from complaints.
Fastening technology
General questions about installation material for windows and doors
With our high-quality installation material for windows and doors, you benefit from professional and reliable installation of your window and door elements. Here you will find answers to the most important questions.