45421110 - Installation of door and window frames

CPV code 45421110 in the EU Common Procurement Vocabulary refers to Installation of door and window frames. It sits at level 6 of the CPV hierarchy as a subcategory within the 45 division. This code is nested directly under 45421100, narrowing the broader category into the specific area of installation of door and window frames. As a leaf code, 45421110 has no further subdivisions and represents the most precise classification available in this branch — buyers should reference it directly in tender notices when the procurement primarily concerns installation of door and window frames. Contracting authorities across the EU use 45421110 in TED notices and national procurement portals to signal that a tender relates to installation of door and window frames.