Prefab Online offers free construction software for dormer windows to professionals

The tool makes building more efficient: quick design, error-free drawing, and instant quotes.

Prefab Online provides its professional construction software free of charge to contractors, carpenters, and roofers. With this tool, professionals can design a dormer window in 3D, immediately see the cost price, easily manage projects, and automatically generate a complete technical drawing in just a few minutes. The software saves time, prevents errors, and makes the process more transparent.

Efficiency for the professional

The tool replaces separate calculations, drawings, and price requests. The user works entirely digitally and remains in control of the entire process—from the initial sketch to delivery at the construction site.

With Prefab Online, professionals can work faster, more accurately, and with greater clarity at every stage of the process:

• Designs: Work with the customer to design a dormer window in 3D and immediately see the current price.
• Sales: Simply add your own margin and use the calculation as a sales offer at the table.
• Calculation: The cost price is adjusted in real time with every change, so quotes are ready within minutes.
• Work preparation: After saving, a technical drawing is automatically generated and saved in the personal dashboard.
• Delivery: Select the desired delivery date with a fixed delivery time and have the dormer window delivered to the location with a self-unloading truck.

All steps follow each other automatically, without separate documents or additional phone calls. This makes the process clear, error-free, and considerably faster than traditional methods.

Without an account, visitors see consumer prices. After registering, professionals see their business net prices.

Greater efficiency and better sales opportunities

“Many software packages only provide a price quote,” says Hans Hendrikx, founder of Prefab Online. “Our configurator calculates everything immediately and makes ordering possible right away. The professional no longer has to wait for quotes or drawings. This not only speeds up the process, but also increases the chance of a sale. Everything happens while you are sitting at the table with the customer.”

Carpenter Koen Daelmans has noticed the same thing in practice: “I put together the dormer window with the customer, add my margin, and place the order immediately. The working drawing is ready and delivery is scheduled. The customer sees exactly what they are getting and can make a decision more quickly. This is efficient and prevents misunderstandings.”

Free and ready to use

The software is available free of charge immediately via www.prefab.online.

There is no license, subscription, or trial period.