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Dachfenster.one is a German vertical home-improvement e-commerce/service platform focused on 1:1 replacement of VELUX roof windows. Users upload a photo of the nameplate on their old window or enter the code, and after the system identifies the model, it provides a fixed price including materials and professional installation, with online ordering available.
The platform digitizes the traditional “on-site measurement—quote—installation” process: AI identifies the VELUX model, and users select the configuration for the new window, such as plastic/wood frames, triple glazing, or an Energy-Plus model. They then receive a clear quote. Fulfillment includes removal of the old window, delivery of original VELUX windows, installation according to VELUX specifications, interior lining connection, acceptance documentation, and warranty. Installation typically takes 2–4 hours per window, and standard 1:1 replacements generally do not require changes to the interior lining.
The main text indicates that standard replacement including installation starts at around €900, depending on size and model. Orders of 5 windows or more automatically receive a 3% discount, while orders of 10 or more receive 5%. The fixed price does not include certain special items, such as changing the roof opening, scaffolding/lifting equipment, interior painting, or drywall work; disposal of old windows costs an additional €75 per window. Payment is completed in the shopping cart, with Klarna installment payments explicitly supported. BAFA energy-efficiency subsidies can reach 15%–20%, but require an energy consultant, costing around €500, so they are usually more worthwhile for 3–4 windows or more.
The advantages are transparent pricing, a short process, no need for on-site measurement, and installation by master roofing companies, making it well suited to standardized replacements. The platform focuses on VELUX, making its supply chain and installation process more controllable. The drawbacks are also clear: it does not support other brands such as Braas or Roto; complex roofs, cases requiring scaffolding, or structural modifications are not covered by the fixed price; and service coverage is not clearly specified.
It is suitable for homeowners in Germany with aging VELUX roof windows who want to quickly obtain a fixed quote and complete an energy-efficiency upgrade, especially users replacing multiple windows in bulk. For Chinese cross-border sellers, this is not an open marketplace platform for merchants, but a localized home-improvement fulfillment service. Access from mainland China is not provided in the main text, so it is considered unknown.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on dachfenster.one official site.
dachfenster.one is an Germany Local Life provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of Limited (proxy recommended). Click "Visit Official Site" to reach dachfenster.one directly.